{"id":2331,"date":"2026-01-09T13:54:14","date_gmt":"2026-01-09T12:54:14","guid":{"rendered":"https:\/\/www.nickelcasting.com\/?page_id=2331"},"modified":"2026-03-28T15:35:49","modified_gmt":"2026-03-28T14:35:49","slug":"kovar","status":"publish","type":"page","link":"https:\/\/www.nickelcasting.com\/de\/nickellegierungen\/kovar\/","title":{"rendered":"Kovar"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"2331\" class=\"elementor elementor-2331\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3365d6e e-flex e-con-boxed e-con e-parent\" data-id=\"3365d6e\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6a4cd01 elementor-widget elementor-widget-html\" data-id=\"6a4cd01\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<link rel=\"stylesheet\" href=\"\/zicss\/nickel6.css\">\n\n<div class=\"product-detail-wrapper\">\n\n    <div class=\"breadcrumbs\">\n        <a href=\"\/de\/\">Startseite<\/a> \n        <span class=\"separator\">\/<\/span> \n        <a href=\"\/de\/nickellegierungen\/\">Nickel-Legierungen<\/a>\n        <span class=\"separator\">\/<\/span> \n        Kovar\n    <\/div>\n\n    <div class=\"prod-hero\">\n        <div class=\"prod-image-box\">\n            <img decoding=\"async\" src=\"http:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/nickel30.jpg\" alt=\"Kovar Glas-Metall-Dichtungslegierung\">\n        <\/div>\n        \n        <div class=\"prod-info-box\">\n            <h1>Kovar\u00ae.<\/h1>\n            <div class=\"prod-subtitle\">UNS K94610 | W.Nr. 1.3981 | ASTM F15<\/div>\n            \n            <p>\n                Kovar ist eine Legierung aus Nickel (29%), Kobalt (17%) und Eisen (54%) mit kontrollierter Ausdehnung. Sie ist weithin daf\u00fcr bekannt, einen W\u00e4rmeausdehnungskoeffizienten zu haben, der dem von Borsilikat- (Hart-) Gl\u00e4sern und Aluminiumoxid-Keramik entspricht, was sie zum Industriestandard f\u00fcr zuverl\u00e4ssige hermetische Dichtungen macht.\n            <\/p>\n\n            <ul class=\"key-specs-list\">\n                <li><strong>Gebr\u00e4uchliche Formulare:<\/strong> Sheet, Strip, Plate, Rod, <a href=\"https:\/\/www.nickelcasting.com\/ko\/product-forms\/wire\/\">Draht<\/a>, Tubing.<\/li>\n                <li><strong>Hauptmerkmal:<\/strong> Entspricht dem WAK von Borosilikatglas und Aluminiumoxid.<\/li>\n                <li><strong>Anwendung:<\/strong> Hochintegrierte hermetische Dichtungen (vakuumdicht).<\/li>\n                <li><strong>Qualit\u00e4t:<\/strong> Doppelt geschmolzen (VIM-VAR) f\u00fcr einschlussfreies Gef\u00fcge.<\/li>\n            <\/ul>\n\n            <div class=\"action-area\">\n                <a href=\"\/de\/kontakt\/\" class=\"quote-btn\">Angebot anfordern<\/a>\n                <a href=\"#\" class=\"download-btn\">Datenblatt herunterladen<\/a>\n            <\/div>\n        <\/div>\n    <\/div>\n\n    <div class=\"section-head\">Warum Kovar w\u00e4hlen?<\/div>\n    <p>\n        Die meisten Metalle dehnen sich beim Erhitzen viel schneller aus als Glas. Wenn Sie versuchen, einen Kupferstift in Glas zu versiegeln, wird das Glas beim Abk\u00fchlen zerspringen. <strong>Kovar l\u00f6st dieses Problem.<\/strong> Seine W\u00e4rmeausdehnungskurve passt sich perfekt an harte\" Gl\u00e4ser (wie Pyrex) und Keramik von -80\u00b0C bis 450\u00b0C an und gew\u00e4hrleistet, dass die Dichtung w\u00e4hrend ihrer gesamten Lebensdauer spannungsfrei und vakuumdicht bleibt.\n    <\/p>\n\n    <div class=\"feature-grid\">\n        <div class=\"feature-col\">\n            <h4>Hermetische Abdichtung<\/h4>\n            <p>Sorgt f\u00fcr vakuumdichte Versiegelungen, die f\u00fcr Vakuumr\u00f6hren, R\u00f6ntgenr\u00f6hren und milit\u00e4rische Elektronikgeh\u00e4use unerl\u00e4sslich sind.<\/p>\n        <\/div>\n        <div class=\"feature-col\">\n            <h4>Phasenstabilit\u00e4t<\/h4>\n            <p>Pr\u00e4zise chemische Kontrollen sorgen daf\u00fcr, dass die Legierung ihre austenitische Struktur bis zu -80 \u00b0C beibeh\u00e4lt, wodurch Volumen\u00e4nderungen, die zu Rissen in den Dichtungen f\u00fchren k\u00f6nnten, verhindert werden.<\/p>\n        <\/div>\n        <div class=\"feature-col\">\n            <h4>Sauberes Mikrogef\u00fcge<\/h4>\n            <p>Unser Kovar wird in der Regel im Vakuum-Lichtbogen-Umschmelzverfahren (VAR) hergestellt, um Verunreinigungen zu minimieren und einheitliche \u00c4tz- und Beschichtungseigenschaften zu gew\u00e4hrleisten.<\/p>\n        <\/div>\n    <\/div>\n\n    <div class=\"section-head\">Chemische Zusammensetzung (%)<\/div>\n    <div class=\"data-table-wrap\">\n        <table class=\"tech-table\">\n            <thead>\n                <tr>\n                    <th>Element<\/th>\n                    <th>Inhalt (%)<\/th>\n                <\/tr>\n            <\/thead>\n            <tbody>\n                <tr>\n                    <td><strong>Nickel (Ni)<\/strong><\/td>\n                    <td>29.0<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Kobalt (Co)<\/strong><\/td>\n                    <td>17.0<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Eisen (Fe)<\/strong><\/td>\n                    <td>Bilanz<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Kohlenstoff (C)<\/strong><\/td>\n                    <td>0,02 max<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Mangan (Mn)<\/strong><\/td>\n                    <td>0.30<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Silizium (Si)<\/strong><\/td>\n                    <td>0.20<\/td>\n                <\/tr>\n            <\/tbody>\n        <\/table>\n        <p style=\"font-size:0.85rem; color:#666; margin-top:10px;\">*Hinweis: Die spezielle Nickel-Kobalt-Eisen-Waage ist f\u00fcr eine pr\u00e4zise Ausdehnungskontrolle kalibriert.<\/p>\n    <\/div>\n\n    <div class=\"section-head\">Standard-Spezifikationen<\/div>\n    <div class=\"data-table-wrap\">\n        <table class=\"tech-table\">\n            <thead>\n                <tr>\n                    <th width=\"30%\">Produkt Form<\/th>\n                    <th>Normen (ASTM \/ AMS \/ MIL)<\/th>\n                <\/tr>\n            <\/thead>\n            <tbody>\n                <tr>\n                    <td><strong>Stange, Stab, Draht<\/strong><\/td>\n                    <td>ASTM F15, AMS I-23011 Klasse 1, MIL-I-23011 Klasse 1<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Bleche, B\u00e4nder, Platten<\/strong><\/td>\n                    <td>ASTM F15, AMS I-23011 Klasse 1, MIL-I-23011 Klasse 1<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Schl\u00e4uche<\/strong><\/td>\n                    <td>ASTM F15<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>DIN-Norm<\/strong><\/td>\n                    <td>DIN 17745, W.Nr. 1.3981<\/td>\n                <\/tr>\n            <\/tbody>\n        <\/table>\n    <\/div>\n\n    \n    <div class=\"section-head\">Available Forms for Kovar\u00ae (ASTM F15)<\/div>\n    <p style=\"margin-bottom: 25px;\">\n        To support the rigorous demands of the semiconductor, aerospace, and high-vacuum electronics industries, we supply Kovar in precision-manufactured forms optimized for deep drawing, stamping, and machining.\n    <\/p>\n\n    <div class=\"forms-grid\">\n        <a href=\"\/de\/product-forms\/wire\/\" class=\"form-card-link\">\n            <div class=\"form-card-icon\">\ud83e\uddf5<\/div>\n            <div class=\"form-card-content\">\n                <h4>Precision Strip & Foil<\/h4>\n                <p>Ultra-thin coil and strip optimized for high-speed stamping and photo-etching of flat packs, hybrid circuit packages, and TO headers.<\/p>\n            <\/div>\n        <\/a>\n\n        <a href=\"\/de\/product-forms\/wire\/\" class=\"form-card-link\">\n            <div class=\"form-card-icon\">\ud83e\udea1<\/div>\n            <div class=\"form-card-content\">\n                <h4>Sealing Wire & Pin<\/h4>\n                <p>High-purity wire engineered specifically for creating flawless, vacuum-tight glass-to-metal seals in x-ray tubes and scientific instruments.<\/p>\n            <\/div>\n        <\/a>\n\n        <a href=\"\/de\/product-forms\/plate-and-sheet\/\" class=\"form-card-link\">\n            <div class=\"form-card-icon\">\ud83d\udd32<\/div>\n            <div class=\"form-card-content\">\n                <h4>Sheet & Plate<\/h4>\n                <p>Flat stock with excellent deep drawing properties, used extensively for manufacturing military-grade electronic enclosures and radar components.<\/p>\n            <\/div>\n        <\/a>\n\n        <a href=\"\/de\/product-forms\/bar\/\" class=\"form-card-link\">\n            <div class=\"form-card-icon\">\ud83d\udccf<\/div>\n            <div class=\"form-card-content\">\n                <h4>Stange &amp; Stab<\/h4>\n                <p>Round bar stock supplied for the precision CNC machining of high-vacuum feed-throughs, microwave tubes, and matched-expansion joints.<\/p>\n            <\/div>\n        <\/a>\n\n        <a href=\"\/de\/product-forms\/pipe-and-tube\/\" class=\"form-card-link\">\n            <div class=\"form-card-icon\">\ud83d\ude87<\/div>\n            <div class=\"form-card-content\">\n                <h4>Seamless Tubing<\/h4>\n                <p>Precision tubing utilized in the construction of high-power transmitting tubes, laser enclosures, and specialized medical equipment.<\/p>\n            <\/div>\n        <\/a>\n    <\/div>\n    <div class=\"section-head\">W\u00e4rmeausdehnungskoeffizient (typisch)<\/div>\n    <div class=\"data-table-wrap\">\n        <table class=\"tech-table\">\n            <thead>\n                <tr>\n                    <th>Temperaturbereich<\/th>\n                    <th>Durchschnittlicher WAK (\u00b5m\/m-\u00b0C)<\/th>\n                    <th>Streichh\u00f6lzer<\/th>\n                <\/tr>\n            <\/thead>\n            <tbody>\n                <tr>\n                    <td><strong>30 - 200\u00b0C<\/strong><\/td>\n                    <td>5.2<\/td>\n                    <td>Hartglas (Borosilikat)<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>30 - 300\u00b0C<\/strong><\/td>\n                    <td>5.1<\/td>\n                    <td>Tonerde-Keramik (92% - 99%)<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>30 - 400\u00b0C<\/strong><\/td>\n                    <td>4.9<\/td>\n                    <td>Saphir \/ Rubin<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>30 - 450\u00b0C<\/strong><\/td>\n                    <td>5.3<\/td>\n                    <td>Power Tube Glas<\/td>\n                <\/tr>\n            <\/tbody>\n        <\/table>\n    <\/div>\n\n    <div class=\"section-head\">Typische Anwendungen<\/div>\n    <div class=\"app-list\">\n        <div class=\"app-card\">\n            <h4>Power-R\u00f6hren<\/h4>\n            <p>Sender\u00f6hren, Wanderfeldr\u00f6hren (TWT) und R\u00f6ntgenr\u00f6hren, die Vakuumintegrit\u00e4t erfordern.<\/p>\n        <\/div>\n        <div class=\"app-card\">\n            <h4>Elektronische Pakete<\/h4>\n            <p>Transistorumrisse (TO-Header), Hybridschaltungen und Flachbaugruppen.<\/p>\n        <\/div>\n        <div class=\"app-card\">\n            <h4>Wissenschaftliche Instrumente<\/h4>\n            <p>Durchf\u00fchrungen f\u00fcr Hochvakuumkammern und Massenspektrometer.<\/p>\n        <\/div>\n        <div class=\"app-card\">\n            <h4>Beleuchtung<\/h4>\n            <p>\u00d6sen und Zuleitungsdr\u00e4hte f\u00fcr Gl\u00fchlampen mit hoher Lichtst\u00e4rke.<\/p>\n        <\/div>\n    <\/div>\n\n    <div id=\"quote-form\" style=\"margin-top: 60px; background: #f1f4f6; padding: 40px; border-radius: 5px; text-align: center;\">\n        <h3 style=\"color: var(--prod-primary); margin-top: 0;\">Ben\u00f6tigen Sie Kovar (ASTM F15) Material?<\/h3>\n        <p style=\"max-width: 600px; margin: 0 auto 20px;\">\n            We maintain a deep inventory of Kovar in plate, sheet, coil, rod, and wire forms.\n            Material is suitable for deep drawing and stamping.\n        <\/p>\n        <a href=\"\/de\/kontakt\/\" class=\"quote-btn\">Schnelles Angebot einholen<\/a>\n    <\/div>\n\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Home \/ Nickel Alloys \/ Kovar Kovar\u00ae UNS K94610 | W.Nr. 1.3981 | ASTM F15 Kovar is a nominal 29% nickel, 17% cobalt, 54% iron controlled-expansion alloy. It is widely known for having a coefficient of thermal expansion that matches borosilicate (hard) glasses and alumina ceramics, making it the industry standard for reliable hermetic sealing. [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"parent":1831,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_theme","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"no-sidebar","site-content-layout":"page-builder","ast-site-content-layout":"full-width-container","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-2331","page","type-page","status-publish","hentry"],"spectra_custom_meta":{"_edit_lock":["1774708550:1"],"_edit_last":["1"],"rank_math_internal_links_processed":["1"],"rank_math_seo_score":["82"],"rank_math_description":["Kovar is a precision alloy used in glass-to-metal sealing for electronics, aerospace, and medical applications."],"rank_math_focus_keyword":["kovar"],"_wp_page_template":["elementor_theme"],"site-sidebar-layout":["no-sidebar"],"ast-site-content-layout":["full-width-container"],"site-content-style":["default"],"site-sidebar-style":["default"],"theme-transparent-header-meta":["default"],"_elementor_edit_mode":["builder"],"_astra_content_layout_flag":["disabled"],"ast-title-bar-display":["disabled"],"ast-featured-img":["disabled"],"site-content-layout":["page-builder"],"_elementor_template_type":["wp-page"],"_elementor_version":["3.33.2"],"_elementor_pro_version":["3.32.3"],"_elementor_data":["[{\"id\":\"3365d6e\",\"elType\":\"container\",\"settings\":{\"flex_direction\":\"column\",\"display_condition_list\":[{\"display_condition_login_status\":\"subscriber\",\"_id\":\"770e0ad\"}]},\"elements\":[{\"id\":\"6a4cd01\",\"elType\":\"widget\",\"settings\":{\"html\":\"<link rel=\\\"stylesheet\\\" href=\\\"\\\/zicss\\\/nickel6.css\\\">\\n\\n<div class=\\\"product-detail-wrapper\\\">\\n\\n    <div class=\\\"breadcrumbs\\\">\\n        <a href=\\\"\\\/\\\">Home<\\\/a> \\n        <span class=\\\"separator\\\">\\\/<\\\/span> \\n        <a href=\\\"\\\/nickel-alloys\\\/\\\">Nickel Alloys<\\\/a>\\n        <span class=\\\"separator\\\">\\\/<\\\/span> \\n        Kovar\\n    <\\\/div>\\n\\n    <div class=\\\"prod-hero\\\">\\n        <div class=\\\"prod-image-box\\\">\\n            <img src=\\\"http:\\\/\\\/www.nickelcasting.com\\\/wp-content\\\/uploads\\\/2026\\\/01\\\/nickel30.jpg\\\" alt=\\\"Kovar Glass to Metal Sealing Alloy\\\">\\n        <\\\/div>\\n        \\n        <div class=\\\"prod-info-box\\\">\\n            <h1>Kovar\\u00ae<\\\/h1>\\n            <div class=\\\"prod-subtitle\\\">UNS K94610 | W.Nr. 1.3981 | ASTM F15<\\\/div>\\n            \\n            <p>\\n                Kovar is a nominal 29% nickel, 17% cobalt, 54% iron controlled-expansion alloy. It is widely known for having a coefficient of thermal expansion that matches borosilicate (hard) glasses and alumina ceramics, making it the industry standard for reliable hermetic sealing.\\n            <\\\/p>\\n\\n            <ul class=\\\"key-specs-list\\\">\\n                <li><strong>Common Forms:<\\\/strong> Sheet, Strip, Plate, Rod, Wire, Tubing.<\\\/li>\\n                <li><strong>Key Feature:<\\\/strong> Matches CTE of Borosilicate Glass & Alumina.<\\\/li>\\n                <li><strong>Application:<\\\/strong> High-integrity Hermetic Seals (Vacuum Tight).<\\\/li>\\n                <li><strong>Quality:<\\\/strong> Double melted (VIM-VAR) for inclusion-free microstructure.<\\\/li>\\n            <\\\/ul>\\n\\n            <div class=\\\"action-area\\\">\\n                <a href=\\\"\\\/contact\\\/\\\" class=\\\"quote-btn\\\">Request a Quote<\\\/a>\\n                <a href=\\\"#\\\" class=\\\"download-btn\\\">Download Datasheet<\\\/a>\\n            <\\\/div>\\n        <\\\/div>\\n    <\\\/div>\\n\\n    <div class=\\\"section-head\\\">Why Choose Kovar?<\\\/div>\\n    <p>\\n        Most metals expand much faster than glass when heated. If you try to seal a copper pin into glass, the glass will shatter as it cools. <strong>Kovar solves this.<\\\/strong> Its thermal expansion curve tracks perfectly with \\\"hard\\\" glasses (like Pyrex) and ceramics from -80\\u00b0C to 450\\u00b0C, ensuring that the seal remains stress-free and vacuum-tight throughout its life.\\n    <\\\/p>\\n\\n    <div class=\\\"feature-grid\\\">\\n        <div class=\\\"feature-col\\\">\\n            <h4>Hermetic Sealing<\\\/h4>\\n            <p>Ensures vacuum-tight seals essential for vacuum tubes, X-ray tubes, and military electronics packages.<\\\/p>\\n        <\\\/div>\\n        <div class=\\\"feature-col\\\">\\n            <h4>Phase Stability<\\\/h4>\\n            <p>Precise chemistry controls ensure the alloy maintains its austenitic structure down to -80\\u00b0C, preventing volume changes that could crack seals.<\\\/p>\\n        <\\\/div>\\n        <div class=\\\"feature-col\\\">\\n            <h4>Clean Microstructure<\\\/h4>\\n            <p>Our Kovar is typically produced via Vacuum Arc Remelting (VAR) to minimize impurities, ensuring uniform etching and plating properties.<\\\/p>\\n        <\\\/div>\\n    <\\\/div>\\n\\n    <div class=\\\"section-head\\\">Chemical Composition (%)<\\\/div>\\n    <div class=\\\"data-table-wrap\\\">\\n        <table class=\\\"tech-table\\\">\\n            <thead>\\n                <tr>\\n                    <th>Element<\\\/th>\\n                    <th>Content (%)<\\\/th>\\n                <\\\/tr>\\n            <\\\/thead>\\n            <tbody>\\n                <tr>\\n                    <td><strong>Nickel (Ni)<\\\/strong><\\\/td>\\n                    <td>29.0<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Cobalt (Co)<\\\/strong><\\\/td>\\n                    <td>17.0<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Iron (Fe)<\\\/strong><\\\/td>\\n                    <td>Balance<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Carbon (C)<\\\/strong><\\\/td>\\n                    <td>0.02 max<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Manganese (Mn)<\\\/strong><\\\/td>\\n                    <td>0.30<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Silicon (Si)<\\\/strong><\\\/td>\\n                    <td>0.20<\\\/td>\\n                <\\\/tr>\\n            <\\\/tbody>\\n        <\\\/table>\\n        <p style=\\\"font-size:0.85rem; color:#666; margin-top:10px;\\\">*Note: The specific Nickel-Cobalt-Iron balance is calibrated for precise expansion control.<\\\/p>\\n    <\\\/div>\\n\\n    <div class=\\\"section-head\\\">Standard Specifications<\\\/div>\\n    <div class=\\\"data-table-wrap\\\">\\n        <table class=\\\"tech-table\\\">\\n            <thead>\\n                <tr>\\n                    <th width=\\\"30%\\\">Product Form<\\\/th>\\n                    <th>Standards (ASTM \\\/ AMS \\\/ MIL)<\\\/th>\\n                <\\\/tr>\\n            <\\\/thead>\\n            <tbody>\\n                <tr>\\n                    <td><strong>Bar, Rod, Wire<\\\/strong><\\\/td>\\n                    <td>ASTM F15, AMS I-23011 Class 1, MIL-I-23011 Class 1<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Sheet, Strip, Plate<\\\/strong><\\\/td>\\n                    <td>ASTM F15, AMS I-23011 Class 1, MIL-I-23011 Class 1<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Tubing<\\\/strong><\\\/td>\\n                    <td>ASTM F15<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>DIN Standard<\\\/strong><\\\/td>\\n                    <td>DIN 17745, W.Nr. 1.3981<\\\/td>\\n                <\\\/tr>\\n            <\\\/tbody>\\n        <\\\/table>\\n    <\\\/div>\\n\\n    \\n    <div class=\\\"section-head\\\">Available Forms for Kovar\\u00ae (ASTM F15)<\\\/div>\\n    <p style=\\\"margin-bottom: 25px;\\\">\\n        To support the rigorous demands of the semiconductor, aerospace, and high-vacuum electronics industries, we supply Kovar in precision-manufactured forms optimized for deep drawing, stamping, and machining.\\n    <\\\/p>\\n\\n    <div class=\\\"forms-grid\\\">\\n        <a href=\\\"\\\/product-forms\\\/wire\\\/\\\" class=\\\"form-card-link\\\">\\n            <div class=\\\"form-card-icon\\\">\\ud83e\\uddf5<\\\/div>\\n            <div class=\\\"form-card-content\\\">\\n                <h4>Precision Strip & Foil<\\\/h4>\\n                <p>Ultra-thin coil and strip optimized for high-speed stamping and photo-etching of flat packs, hybrid circuit packages, and TO headers.<\\\/p>\\n            <\\\/div>\\n        <\\\/a>\\n\\n        <a href=\\\"\\\/product-forms\\\/wire\\\/\\\" class=\\\"form-card-link\\\">\\n            <div class=\\\"form-card-icon\\\">\\ud83e\\udea1<\\\/div>\\n            <div class=\\\"form-card-content\\\">\\n                <h4>Sealing Wire & Pin<\\\/h4>\\n                <p>High-purity wire engineered specifically for creating flawless, vacuum-tight glass-to-metal seals in x-ray tubes and scientific instruments.<\\\/p>\\n            <\\\/div>\\n        <\\\/a>\\n\\n        <a href=\\\"\\\/product-forms\\\/plate-and-sheet\\\/\\\" class=\\\"form-card-link\\\">\\n            <div class=\\\"form-card-icon\\\">\\ud83d\\udd32<\\\/div>\\n            <div class=\\\"form-card-content\\\">\\n                <h4>Sheet & Plate<\\\/h4>\\n                <p>Flat stock with excellent deep drawing properties, used extensively for manufacturing military-grade electronic enclosures and radar components.<\\\/p>\\n            <\\\/div>\\n        <\\\/a>\\n\\n        <a href=\\\"\\\/product-forms\\\/bar\\\/\\\" class=\\\"form-card-link\\\">\\n            <div class=\\\"form-card-icon\\\">\\ud83d\\udccf<\\\/div>\\n            <div class=\\\"form-card-content\\\">\\n                <h4>Bar & Rod<\\\/h4>\\n                <p>Round bar stock supplied for the precision CNC machining of high-vacuum feed-throughs, microwave tubes, and matched-expansion joints.<\\\/p>\\n            <\\\/div>\\n        <\\\/a>\\n\\n        <a href=\\\"\\\/product-forms\\\/pipe-and-tube\\\/\\\" class=\\\"form-card-link\\\">\\n            <div class=\\\"form-card-icon\\\">\\ud83d\\ude87<\\\/div>\\n            <div class=\\\"form-card-content\\\">\\n                <h4>Seamless Tubing<\\\/h4>\\n                <p>Precision tubing utilized in the construction of high-power transmitting tubes, laser enclosures, and specialized medical equipment.<\\\/p>\\n            <\\\/div>\\n        <\\\/a>\\n    <\\\/div>\\n    <div class=\\\"section-head\\\">Coefficient of Thermal Expansion (Typical)<\\\/div>\\n    <div class=\\\"data-table-wrap\\\">\\n        <table class=\\\"tech-table\\\">\\n            <thead>\\n                <tr>\\n                    <th>Temperature Range<\\\/th>\\n                    <th>Average CTE (\\u00b5m\\\/m\\u00b7\\u00b0C)<\\\/th>\\n                    <th>Matches<\\\/th>\\n                <\\\/tr>\\n            <\\\/thead>\\n            <tbody>\\n                <tr>\\n                    <td><strong>30 - 200\\u00b0C<\\\/strong><\\\/td>\\n                    <td>5.2<\\\/td>\\n                    <td>Hard Glass (Borosilicate)<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>30 - 300\\u00b0C<\\\/strong><\\\/td>\\n                    <td>5.1<\\\/td>\\n                    <td>Alumina Ceramics (92% - 99%)<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>30 - 400\\u00b0C<\\\/strong><\\\/td>\\n                    <td>4.9<\\\/td>\\n                    <td>Sapphire \\\/ Ruby<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>30 - 450\\u00b0C<\\\/strong><\\\/td>\\n                    <td>5.3<\\\/td>\\n                    <td>Power Tube Glass<\\\/td>\\n                <\\\/tr>\\n            <\\\/tbody>\\n        <\\\/table>\\n    <\\\/div>\\n\\n    <div class=\\\"section-head\\\">Typical Applications<\\\/div>\\n    <div class=\\\"app-list\\\">\\n        <div class=\\\"app-card\\\">\\n            <h4>Power Tubes<\\\/h4>\\n            <p>Transmitting tubes, traveling wave tubes (TWT), and X-ray tubes requiring vacuum integrity.<\\\/p>\\n        <\\\/div>\\n        <div class=\\\"app-card\\\">\\n            <h4>Electronic Packages<\\\/h4>\\n            <p>Transistor outlines (TO headers), hybrid circuit packages, and flat packs.<\\\/p>\\n        <\\\/div>\\n        <div class=\\\"app-card\\\">\\n            <h4>Scientific Instruments<\\\/h4>\\n            <p>Feed-throughs for high-vacuum chambers and mass spectrometers.<\\\/p>\\n        <\\\/div>\\n        <div class=\\\"app-card\\\">\\n            <h4>Lighting<\\\/h4>\\n            <p>Eyelets and lead wires for high-intensity incandescent lamps.<\\\/p>\\n        <\\\/div>\\n    <\\\/div>\\n\\n    <div id=\\\"quote-form\\\" style=\\\"margin-top: 60px; background: #f1f4f6; padding: 40px; border-radius: 5px; text-align: center;\\\">\\n        <h3 style=\\\"color: var(--prod-primary); margin-top: 0;\\\">Need Kovar (ASTM F15) Material?<\\\/h3>\\n        <p style=\\\"max-width: 600px; margin: 0 auto 20px;\\\">\\n            We maintain a deep inventory of Kovar in plate, sheet, coil, rod, and wire forms.\\n            Material is suitable for deep drawing and stamping.\\n        <\\\/p>\\n        <a href=\\\"\\\/contact\\\/\\\" class=\\\"quote-btn\\\">Get a Quick Quote<\\\/a>\\n    <\\\/div>\\n\\n<\\\/div>\",\"display_condition_list\":[{\"display_condition_login_status\":\"subscriber\",\"_id\":\"6c618c2\"}]},\"elements\":[],\"widgetType\":\"html\"}],\"isInner\":false}]"],"rank_math_og_content_image":["a:2:{s:5:\"check\";s:32:\"cd8fcf489e36024dd1f93b0917c2a8c6\";s:6:\"images\";a:1:{i:0;i:2321;}}"],"ilj_blacklistdefinition":["a:0:{}"],"ilj_linkdefinition":["a:1:{i:0;s:5:\"Kovar\";}"],"astra-migrate-meta-layouts":["set"],"_elementor_page_settings":["a:0:{}"],"_elementor_controls_usage":["a:2:{s:4:\"html\";a:3:{s:5:\"count\";i:1;s:15:\"control_percent\";i:0;s:8:\"controls\";a:2:{s:7:\"content\";a:1:{s:13:\"section_title\";a:1:{s:4:\"html\";i:1;}}s:8:\"advanced\";a:1:{s:26:\"display_conditions_section\";a:1:{s:22:\"display_condition_list\";i:1;}}}}s:9:\"container\";a:3:{s:5:\"count\";i:1;s:15:\"control_percent\";i:0;s:8:\"controls\";a:2:{s:6:\"layout\";a:1:{s:24:\"section_layout_container\";a:1:{s:14:\"flex_direction\";i:1;}}s:8:\"advanced\";a:1:{s:26:\"display_conditions_section\";a:1:{s:22:\"display_condition_list\";i:1;}}}}}"],"_uag_page_assets":["a:9:{s:3:\"css\";s:263:\".uag-blocks-common-selector{z-index:var(--z-index-desktop) !important}@media (max-width: 976px){.uag-blocks-common-selector{z-index:var(--z-index-tablet) !important}}@media (max-width: 767px){.uag-blocks-common-selector{z-index:var(--z-index-mobile) !important}}\n\";s:2:\"js\";s:0:\"\";s:18:\"current_block_list\";a:8:{i:0;s:11:\"core\/search\";i:1;s:10:\"core\/group\";i:2;s:12:\"core\/heading\";i:3;s:17:\"core\/latest-posts\";i:4;s:20:\"core\/latest-comments\";i:5;s:13:\"core\/archives\";i:6;s:15:\"core\/categories\";i:7;s:10:\"core\/image\";}s:8:\"uag_flag\";b:0;s:11:\"uag_version\";s:10:\"1776419131\";s:6:\"gfonts\";a:0:{}s:10:\"gfonts_url\";s:0:\"\";s:12:\"gfonts_files\";a:0:{}s:14:\"uag_faq_layout\";b:0;}"],"_uag_css_file_name":["uag-css-2331.css"],"_elementor_page_assets":["a:1:{s:7:\"scripts\";a:1:{i:0;s:18:\"elementor-frontend\";}}"],"_elementor_css":["a:6:{s:4:\"time\";i:1776543358;s:5:\"fonts\";a:0:{}s:5:\"icons\";a:0:{}s:20:\"dynamic_elements_ids\";a:0:{}s:6:\"status\";s:4:\"file\";i:0;s:0:\"\";}"],"_elementor_element_cache":["{\"timeout\":1776633358,\"value\":{\"content\":\"<div class=\\\"elementor-element elementor-element-3365d6e e-flex e-con-boxed e-con e-parent\\\" data-id=\\\"3365d6e\\\" data-element_type=\\\"container\\\">\\n\\t\\t\\t\\t\\t<div class=\\\"e-con-inner\\\">\\n\\t\\t\\t\\t<div class=\\\"elementor-element elementor-element-6a4cd01 elementor-widget elementor-widget-html\\\" data-id=\\\"6a4cd01\\\" data-element_type=\\\"widget\\\" data-widget_type=\\\"html.default\\\">\\n\\t\\t\\t\\t<div class=\\\"elementor-widget-container\\\">\\n\\t\\t\\t\\t\\t<link rel=\\\"stylesheet\\\" href=\\\"\\\/zicss\\\/nickel6.css\\\">\\n\\n<div class=\\\"product-detail-wrapper\\\">\\n\\n    <div class=\\\"breadcrumbs\\\">\\n        <a href=\\\"\\\/\\\">Home<\\\/a> \\n        <span class=\\\"separator\\\">\\\/<\\\/span> \\n        <a href=\\\"\\\/nickel-alloys\\\/\\\">Nickel Alloys<\\\/a>\\n        <span class=\\\"separator\\\">\\\/<\\\/span> \\n        Kovar\\n    <\\\/div>\\n\\n    <div class=\\\"prod-hero\\\">\\n        <div class=\\\"prod-image-box\\\">\\n            <img src=\\\"http:\\\/\\\/www.nickelcasting.com\\\/wp-content\\\/uploads\\\/2026\\\/01\\\/nickel30.jpg\\\" alt=\\\"Kovar Glass to Metal Sealing Alloy\\\">\\n        <\\\/div>\\n        \\n        <div class=\\\"prod-info-box\\\">\\n            <h1>Kovar\\u00ae<\\\/h1>\\n            <div class=\\\"prod-subtitle\\\">UNS K94610 | W.Nr. 1.3981 | ASTM F15<\\\/div>\\n            \\n            <p>\\n                Kovar is a nominal 29% nickel, 17% cobalt, 54% iron controlled-expansion alloy. It is widely known for having a coefficient of thermal expansion that matches borosilicate (hard) glasses and alumina ceramics, making it the industry standard for reliable hermetic sealing.\\n            <\\\/p>\\n\\n            <ul class=\\\"key-specs-list\\\">\\n                <li><strong>Common Forms:<\\\/strong> Sheet, Strip, Plate, Rod, Wire, Tubing.<\\\/li>\\n                <li><strong>Key Feature:<\\\/strong> Matches CTE of Borosilicate Glass & Alumina.<\\\/li>\\n                <li><strong>Application:<\\\/strong> High-integrity Hermetic Seals (Vacuum Tight).<\\\/li>\\n                <li><strong>Quality:<\\\/strong> Double melted (VIM-VAR) for inclusion-free microstructure.<\\\/li>\\n            <\\\/ul>\\n\\n            <div class=\\\"action-area\\\">\\n                <a href=\\\"\\\/contact\\\/\\\" class=\\\"quote-btn\\\">Request a Quote<\\\/a>\\n                <a href=\\\"#\\\" class=\\\"download-btn\\\">Download Datasheet<\\\/a>\\n            <\\\/div>\\n        <\\\/div>\\n    <\\\/div>\\n\\n    <div class=\\\"section-head\\\">Why Choose Kovar?<\\\/div>\\n    <p>\\n        Most metals expand much faster than glass when heated. If you try to seal a copper pin into glass, the glass will shatter as it cools. <strong>Kovar solves this.<\\\/strong> Its thermal expansion curve tracks perfectly with \\\"hard\\\" glasses (like Pyrex) and ceramics from -80\\u00b0C to 450\\u00b0C, ensuring that the seal remains stress-free and vacuum-tight throughout its life.\\n    <\\\/p>\\n\\n    <div class=\\\"feature-grid\\\">\\n        <div class=\\\"feature-col\\\">\\n            <h4>Hermetic Sealing<\\\/h4>\\n            <p>Ensures vacuum-tight seals essential for vacuum tubes, X-ray tubes, and military electronics packages.<\\\/p>\\n        <\\\/div>\\n        <div class=\\\"feature-col\\\">\\n            <h4>Phase Stability<\\\/h4>\\n            <p>Precise chemistry controls ensure the alloy maintains its austenitic structure down to -80\\u00b0C, preventing volume changes that could crack seals.<\\\/p>\\n        <\\\/div>\\n        <div class=\\\"feature-col\\\">\\n            <h4>Clean Microstructure<\\\/h4>\\n            <p>Our Kovar is typically produced via Vacuum Arc Remelting (VAR) to minimize impurities, ensuring uniform etching and plating properties.<\\\/p>\\n        <\\\/div>\\n    <\\\/div>\\n\\n    <div class=\\\"section-head\\\">Chemical Composition (%)<\\\/div>\\n    <div class=\\\"data-table-wrap\\\">\\n        <table class=\\\"tech-table\\\">\\n            <thead>\\n                <tr>\\n                    <th>Element<\\\/th>\\n                    <th>Content (%)<\\\/th>\\n                <\\\/tr>\\n            <\\\/thead>\\n            <tbody>\\n                <tr>\\n                    <td><strong>Nickel (Ni)<\\\/strong><\\\/td>\\n                    <td>29.0<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Cobalt (Co)<\\\/strong><\\\/td>\\n                    <td>17.0<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Iron (Fe)<\\\/strong><\\\/td>\\n                    <td>Balance<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Carbon (C)<\\\/strong><\\\/td>\\n                    <td>0.02 max<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Manganese (Mn)<\\\/strong><\\\/td>\\n                    <td>0.30<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Silicon (Si)<\\\/strong><\\\/td>\\n                    <td>0.20<\\\/td>\\n                <\\\/tr>\\n            <\\\/tbody>\\n        <\\\/table>\\n        <p style=\\\"font-size:0.85rem; color:#666; margin-top:10px;\\\">*Note: The specific Nickel-Cobalt-Iron balance is calibrated for precise expansion control.<\\\/p>\\n    <\\\/div>\\n\\n    <div class=\\\"section-head\\\">Standard Specifications<\\\/div>\\n    <div class=\\\"data-table-wrap\\\">\\n        <table class=\\\"tech-table\\\">\\n            <thead>\\n                <tr>\\n                    <th width=\\\"30%\\\">Product Form<\\\/th>\\n                    <th>Standards (ASTM \\\/ AMS \\\/ MIL)<\\\/th>\\n                <\\\/tr>\\n            <\\\/thead>\\n            <tbody>\\n                <tr>\\n                    <td><strong>Bar, Rod, Wire<\\\/strong><\\\/td>\\n                    <td>ASTM F15, AMS I-23011 Class 1, MIL-I-23011 Class 1<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Sheet, Strip, Plate<\\\/strong><\\\/td>\\n                    <td>ASTM F15, AMS I-23011 Class 1, MIL-I-23011 Class 1<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Tubing<\\\/strong><\\\/td>\\n                    <td>ASTM F15<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>DIN Standard<\\\/strong><\\\/td>\\n                    <td>DIN 17745, W.Nr. 1.3981<\\\/td>\\n                <\\\/tr>\\n            <\\\/tbody>\\n        <\\\/table>\\n    <\\\/div>\\n\\n    \\n    <div class=\\\"section-head\\\">Available Forms for Kovar\\u00ae (ASTM F15)<\\\/div>\\n    <p style=\\\"margin-bottom: 25px;\\\">\\n        To support the rigorous demands of the semiconductor, aerospace, and high-vacuum electronics industries, we supply Kovar in precision-manufactured forms optimized for deep drawing, stamping, and machining.\\n    <\\\/p>\\n\\n    <div class=\\\"forms-grid\\\">\\n        <a href=\\\"\\\/product-forms\\\/wire\\\/\\\" class=\\\"form-card-link\\\">\\n            <div class=\\\"form-card-icon\\\">\\ud83e\\uddf5<\\\/div>\\n            <div class=\\\"form-card-content\\\">\\n                <h4>Precision Strip & Foil<\\\/h4>\\n                <p>Ultra-thin coil and strip optimized for high-speed stamping and photo-etching of flat packs, hybrid circuit packages, and TO headers.<\\\/p>\\n            <\\\/div>\\n        <\\\/a>\\n\\n        <a href=\\\"\\\/product-forms\\\/wire\\\/\\\" class=\\\"form-card-link\\\">\\n            <div class=\\\"form-card-icon\\\">\\ud83e\\udea1<\\\/div>\\n            <div class=\\\"form-card-content\\\">\\n                <h4>Sealing Wire & Pin<\\\/h4>\\n                <p>High-purity wire engineered specifically for creating flawless, vacuum-tight glass-to-metal seals in x-ray tubes and scientific instruments.<\\\/p>\\n            <\\\/div>\\n        <\\\/a>\\n\\n        <a href=\\\"\\\/product-forms\\\/plate-and-sheet\\\/\\\" class=\\\"form-card-link\\\">\\n            <div class=\\\"form-card-icon\\\">\\ud83d\\udd32<\\\/div>\\n            <div class=\\\"form-card-content\\\">\\n                <h4>Sheet & Plate<\\\/h4>\\n                <p>Flat stock with excellent deep drawing properties, used extensively for manufacturing military-grade electronic enclosures and radar components.<\\\/p>\\n            <\\\/div>\\n        <\\\/a>\\n\\n        <a href=\\\"\\\/product-forms\\\/bar\\\/\\\" class=\\\"form-card-link\\\">\\n            <div class=\\\"form-card-icon\\\">\\ud83d\\udccf<\\\/div>\\n            <div class=\\\"form-card-content\\\">\\n                <h4>Bar & Rod<\\\/h4>\\n                <p>Round bar stock supplied for the precision CNC machining of high-vacuum feed-throughs, microwave tubes, and matched-expansion joints.<\\\/p>\\n            <\\\/div>\\n        <\\\/a>\\n\\n        <a href=\\\"\\\/product-forms\\\/pipe-and-tube\\\/\\\" class=\\\"form-card-link\\\">\\n            <div class=\\\"form-card-icon\\\">\\ud83d\\ude87<\\\/div>\\n            <div class=\\\"form-card-content\\\">\\n                <h4>Seamless Tubing<\\\/h4>\\n                <p>Precision tubing utilized in the construction of high-power transmitting tubes, laser enclosures, and specialized medical equipment.<\\\/p>\\n            <\\\/div>\\n        <\\\/a>\\n    <\\\/div>\\n    <div class=\\\"section-head\\\">Coefficient of Thermal Expansion (Typical)<\\\/div>\\n    <div class=\\\"data-table-wrap\\\">\\n        <table class=\\\"tech-table\\\">\\n            <thead>\\n                <tr>\\n                    <th>Temperature Range<\\\/th>\\n                    <th>Average CTE (\\u00b5m\\\/m\\u00b7\\u00b0C)<\\\/th>\\n                    <th>Matches<\\\/th>\\n                <\\\/tr>\\n            <\\\/thead>\\n            <tbody>\\n                <tr>\\n                    <td><strong>30 - 200\\u00b0C<\\\/strong><\\\/td>\\n                    <td>5.2<\\\/td>\\n                    <td>Hard Glass (Borosilicate)<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>30 - 300\\u00b0C<\\\/strong><\\\/td>\\n                    <td>5.1<\\\/td>\\n                    <td>Alumina Ceramics (92% - 99%)<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>30 - 400\\u00b0C<\\\/strong><\\\/td>\\n                    <td>4.9<\\\/td>\\n                    <td>Sapphire \\\/ Ruby<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>30 - 450\\u00b0C<\\\/strong><\\\/td>\\n                    <td>5.3<\\\/td>\\n                    <td>Power Tube Glass<\\\/td>\\n                <\\\/tr>\\n            <\\\/tbody>\\n        <\\\/table>\\n    <\\\/div>\\n\\n    <div class=\\\"section-head\\\">Typical Applications<\\\/div>\\n    <div class=\\\"app-list\\\">\\n        <div class=\\\"app-card\\\">\\n            <h4>Power Tubes<\\\/h4>\\n            <p>Transmitting tubes, traveling wave tubes (TWT), and X-ray tubes requiring vacuum integrity.<\\\/p>\\n        <\\\/div>\\n        <div class=\\\"app-card\\\">\\n            <h4>Electronic Packages<\\\/h4>\\n            <p>Transistor outlines (TO headers), hybrid circuit packages, and flat packs.<\\\/p>\\n        <\\\/div>\\n        <div class=\\\"app-card\\\">\\n            <h4>Scientific Instruments<\\\/h4>\\n            <p>Feed-throughs for high-vacuum chambers and mass spectrometers.<\\\/p>\\n        <\\\/div>\\n        <div class=\\\"app-card\\\">\\n            <h4>Lighting<\\\/h4>\\n            <p>Eyelets and lead wires for high-intensity incandescent lamps.<\\\/p>\\n        <\\\/div>\\n    <\\\/div>\\n\\n    <div id=\\\"quote-form\\\" style=\\\"margin-top: 60px; background: #f1f4f6; padding: 40px; border-radius: 5px; text-align: center;\\\">\\n        <h3 style=\\\"color: var(--prod-primary); margin-top: 0;\\\">Need Kovar (ASTM F15) Material?<\\\/h3>\\n        <p style=\\\"max-width: 600px; margin: 0 auto 20px;\\\">\\n            We maintain a deep inventory of Kovar in plate, sheet, coil, rod, and wire forms.\\n            Material is suitable for deep drawing and stamping.\\n        <\\\/p>\\n        <a href=\\\"\\\/contact\\\/\\\" class=\\\"quote-btn\\\">Get a Quick Quote<\\\/a>\\n    <\\\/div>\\n\\n<\\\/div>\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t<\\\/div>\\n\\t\\t\",\"scripts\":[],\"styles\":[]}}"]},"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"trp-custom-language-flag":false},"uagb_author_info":{"display_name":"nickel","author_link":"https:\/\/www.nickelcasting.com\/de\/author\/nickel\/"},"uagb_comment_info":0,"uagb_excerpt":"Home \/ Nickel Alloys \/ Kovar Kovar\u00ae UNS K94610 | W.Nr. 1.3981 | ASTM F15 Kovar is a nominal 29% nickel, 17% cobalt, 54% iron controlled-expansion alloy. It is widely known for having a coefficient of thermal expansion that matches borosilicate (hard) glasses and alumina ceramics, making it the industry standard for reliable hermetic sealing.&hellip;","_links":{"self":[{"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/pages\/2331","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/comments?post=2331"}],"version-history":[{"count":14,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/pages\/2331\/revisions"}],"predecessor-version":[{"id":3428,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/pages\/2331\/revisions\/3428"}],"up":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/pages\/1831"}],"wp:attachment":[{"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/media?parent=2331"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}