{"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\/fr\/alliages-de-nickel\/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=\"\/fr\/\">Accueil<\/a> \n        <span class=\"separator\">\/<\/span> \n        <a href=\"\/fr\/alliages-de-nickel\/\">Alliages de nickel<\/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=\"Alliage de scellement verre-m\u00e9tal Kovar\">\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                Le Kovar est un alliage nominal \u00e0 expansion contr\u00f4l\u00e9e de 29% de nickel, 17% de cobalt et 54% de fer. Il est largement connu pour avoir un coefficient de dilatation thermique qui correspond \u00e0 celui des verres borosilicat\u00e9s (durs) et des c\u00e9ramiques d'alumine, ce qui en fait la norme de l'industrie pour un scellement herm\u00e9tique fiable.\n            <\/p>\n\n            <ul class=\"key-specs-list\">\n                <li><strong>Formes courantes :<\/strong> Sheet, Strip, Plate, Rod, <a href=\"https:\/\/www.nickelcasting.com\/ko\/product-forms\/wire\/\">Fil de fer<\/a>, Tubing.<\/li>\n                <li><strong>Caract\u00e9ristiques principales :<\/strong> Correspond au CTE du verre borosilicat\u00e9 et de l'alumine.<\/li>\n                <li><strong>Application :<\/strong> Joints herm\u00e9tiques de haute int\u00e9grit\u00e9 (\u00e9tanches au vide).<\/li>\n                <li><strong>Qualit\u00e9 :<\/strong> Double fusion (VIM-VAR) pour une microstructure sans inclusion.<\/li>\n            <\/ul>\n\n            <div class=\"action-area\">\n                <a href=\"\/fr\/contact\/\" class=\"quote-btn\">Demande de devis<\/a>\n                <a href=\"#\" class=\"download-btn\">T\u00e9l\u00e9charger la fiche technique<\/a>\n            <\/div>\n        <\/div>\n    <\/div>\n\n    <div class=\"section-head\">Pourquoi choisir Kovar ?<\/div>\n    <p>\n        La plupart des m\u00e9taux se dilatent beaucoup plus rapidement que le verre lorsqu'ils sont chauff\u00e9s. Si vous essayez de sceller une \u00e9pingle en cuivre dans du verre, le verre se brisera en refroidissant. <strong>Kovar r\u00e9sout ce probl\u00e8me.<\/strong> Sa courbe de dilatation thermique s'adapte parfaitement aux verres \"durs\" (comme le Pyrex) et aux c\u00e9ramiques de -80\u00b0C \u00e0 450\u00b0C, ce qui garantit que le joint reste sans contrainte et \u00e9tanche au vide pendant toute sa dur\u00e9e de vie.\n    <\/p>\n\n    <div class=\"feature-grid\">\n        <div class=\"feature-col\">\n            <h4>Scellement herm\u00e9tique<\/h4>\n            <p>Assure l'\u00e9tanch\u00e9it\u00e9 au vide des tubes \u00e0 vide, des tubes \u00e0 rayons X et des bo\u00eetiers d'\u00e9lectronique militaire.<\/p>\n        <\/div>\n        <div class=\"feature-col\">\n            <h4>Stabilit\u00e9 de la phase<\/h4>\n            <p>Des contr\u00f4les chimiques pr\u00e9cis garantissent que l'alliage conserve sa structure aust\u00e9nitique jusqu'\u00e0 -80\u00b0C, emp\u00eachant les changements de volume qui pourraient fissurer les joints.<\/p>\n        <\/div>\n        <div class=\"feature-col\">\n            <h4>Microstructure propre<\/h4>\n            <p>Notre Kovar est g\u00e9n\u00e9ralement produit par refonte \u00e0 l'arc sous vide (VAR) afin de minimiser les impuret\u00e9s, ce qui garantit des propri\u00e9t\u00e9s de gravure et de placage uniformes.<\/p>\n        <\/div>\n    <\/div>\n\n    <div class=\"section-head\">Composition chimique (%)<\/div>\n    <div class=\"data-table-wrap\">\n        <table class=\"tech-table\">\n            <thead>\n                <tr>\n                    <th>\u00c9l\u00e9ment<\/th>\n                    <th>Contenu (%)<\/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>Fer (Fe)<\/strong><\/td>\n                    <td>\u00c9quilibre<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Carbone (C)<\/strong><\/td>\n                    <td>0,02 max<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Mangan\u00e8se (Mn)<\/strong><\/td>\n                    <td>0.30<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Silicium (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 : La balance sp\u00e9cifique Nickel-Cobalt-Fer est calibr\u00e9e pour un contr\u00f4le pr\u00e9cis de l'expansion.<\/p>\n    <\/div>\n\n    <div class=\"section-head\">Sp\u00e9cifications standard<\/div>\n    <div class=\"data-table-wrap\">\n        <table class=\"tech-table\">\n            <thead>\n                <tr>\n                    <th width=\"30%\">Forme du produit<\/th>\n                    <th>Normes (ASTM \/ AMS \/ MIL)<\/th>\n                <\/tr>\n            <\/thead>\n            <tbody>\n                <tr>\n                    <td><strong>Barre, tige, fil<\/strong><\/td>\n                    <td>ASTM F15, AMS I-23011 Class 1, MIL-I-23011 Class 1<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Feuilles, bandes, plaques<\/strong><\/td>\n                    <td>ASTM F15, AMS I-23011 Class 1, MIL-I-23011 Class 1<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Tubes<\/strong><\/td>\n                    <td>ASTM F15<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Norme DIN<\/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\">Formes disponibles pour Kovar\u00ae (ASTM F15)<\/div>\n    <p style=\"margin-bottom: 25px;\">\n        Pour r\u00e9pondre aux exigences rigoureuses des industries des semi-conducteurs, de l'a\u00e9rospatiale et de l'\u00e9lectronique sous vide pouss\u00e9, nous fournissons du Kovar sous des formes fabriqu\u00e9es avec pr\u00e9cision et optimis\u00e9es pour l'emboutissage, l'estampage et l'usinage.\n    <\/p>\n\n    <div class=\"forms-grid\">\n        <a href=\"\/fr\/product-forms\/wire\/\" class=\"form-card-link\">\n            <div class=\"form-card-icon\">\ud83e\uddf5<\/div>\n            <div class=\"form-card-content\">\n                <h4>Bandes et feuilles de pr\u00e9cision<\/h4>\n                <p>Bobine et bande ultra-minces optimis\u00e9es pour l'estampage \u00e0 grande vitesse et la photogravure de paquets plats, de bo\u00eetiers de circuits hybrides et d'en-t\u00eates TO.<\/p>\n            <\/div>\n        <\/a>\n\n        <a href=\"\/fr\/product-forms\/wire\/\" class=\"form-card-link\">\n            <div class=\"form-card-icon\">\ud83e\udea1<\/div>\n            <div class=\"form-card-content\">\n                <h4>Fil et goupille d'\u00e9tanch\u00e9it\u00e9<\/h4>\n                <p>Fil de haute puret\u00e9 sp\u00e9cialement con\u00e7u pour cr\u00e9er des joints verre-m\u00e9tal parfaits et \u00e9tanches au vide dans les tubes \u00e0 rayons X et les instruments scientifiques.<\/p>\n            <\/div>\n        <\/a>\n\n        <a href=\"\/fr\/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>Feuilles et plaques<\/h4>\n                <p>Acier plat avec d'excellentes propri\u00e9t\u00e9s d'emboutissage, largement utilis\u00e9 pour la fabrication de bo\u00eetiers \u00e9lectroniques de qualit\u00e9 militaire et de composants de radars.<\/p>\n            <\/div>\n        <\/a>\n\n        <a href=\"\/fr\/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 &amp; Rod<\/h4>\n                <p>Barres rondes fournies pour l'usinage CNC de pr\u00e9cision de travers\u00e9es \u00e0 vide pouss\u00e9, de tubes \u00e0 micro-ondes et de joints de dilatation appari\u00e9s.<\/p>\n            <\/div>\n        <\/a>\n\n        <a href=\"\/fr\/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>Tubes sans soudure<\/h4>\n                <p>Tubes de pr\u00e9cision utilis\u00e9s dans la construction de tubes de transmission de haute puissance, de bo\u00eetiers de laser et d'\u00e9quipements m\u00e9dicaux sp\u00e9cialis\u00e9s.<\/p>\n            <\/div>\n        <\/a>\n    <\/div>\n    <div class=\"section-head\">Coefficient de dilatation thermique (typique)<\/div>\n    <div class=\"data-table-wrap\">\n        <table class=\"tech-table\">\n            <thead>\n                <tr>\n                    <th>Plage de temp\u00e9rature<\/th>\n                    <th>CTE moyen (\u00b5m\/m-\u00b0C)<\/th>\n                    <th>Correspondances<\/th>\n                <\/tr>\n            <\/thead>\n            <tbody>\n                <tr>\n                    <td><strong>30 - 200\u00b0C<\/strong><\/td>\n                    <td>5.2<\/td>\n                    <td>Verre dur (Borosilicate)<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>30 - 300\u00b0C<\/strong><\/td>\n                    <td>5.1<\/td>\n                    <td>C\u00e9ramiques d'alumine (92% - 99%)<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>30 - 400\u00b0C<\/strong><\/td>\n                    <td>4.9<\/td>\n                    <td>Saphir \/ Rubis<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>30 - 450\u00b0C<\/strong><\/td>\n                    <td>5.3<\/td>\n                    <td>Verre du tube de puissance<\/td>\n                <\/tr>\n            <\/tbody>\n        <\/table>\n    <\/div>\n\n    <div class=\"section-head\">Applications typiques<\/div>\n    <div class=\"app-list\">\n        <div class=\"app-card\">\n            <h4>Tubes de puissance<\/h4>\n            <p>Tubes de transmission, tubes \u00e0 ondes progressives (TWT) et tubes \u00e0 rayons X exigeant l'int\u00e9grit\u00e9 du vide.<\/p>\n        <\/div>\n        <div class=\"app-card\">\n            <h4>Emballages \u00e9lectroniques<\/h4>\n            <p>Les contours des transistors (TO headers), les bo\u00eetiers de circuits hybrides et les bo\u00eetiers plats.<\/p>\n        <\/div>\n        <div class=\"app-card\">\n            <h4>Instruments scientifiques<\/h4>\n            <p>Travers\u00e9es pour chambres \u00e0 vide pouss\u00e9 et spectrom\u00e8tres de masse.<\/p>\n        <\/div>\n        <div class=\"app-card\">\n            <h4>Eclairage<\/h4>\n            <p>\u0152illets et fils conducteurs pour lampes \u00e0 incandescence \u00e0 haute intensit\u00e9.<\/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;\">Besoin d'un mat\u00e9riau Kovar (ASTM F15) ?<\/h3>\n        <p style=\"max-width: 600px; margin: 0 auto 20px;\">\n            Nous disposons d'un stock important de Kovar sous forme de plaques, de feuilles, de bobines, de barres et de fils.\n            Le mat\u00e9riau convient \u00e0 l'emboutissage et \u00e0 l'estampage.\n        <\/p>\n        <a href=\"\/fr\/contact\/\" class=\"quote-btn\">Obtenir un devis rapide<\/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 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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) 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!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\/fr\/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.\u2026","_links":{"self":[{"href":"https:\/\/www.nickelcasting.com\/fr\/wp-json\/wp\/v2\/pages\/2331","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nickelcasting.com\/fr\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.nickelcasting.com\/fr\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/fr\/wp-json\/wp\/v2\/comments?post=2331"}],"version-history":[{"count":14,"href":"https:\/\/www.nickelcasting.com\/fr\/wp-json\/wp\/v2\/pages\/2331\/revisions"}],"predecessor-version":[{"id":3428,"href":"https:\/\/www.nickelcasting.com\/fr\/wp-json\/wp\/v2\/pages\/2331\/revisions\/3428"}],"up":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/fr\/wp-json\/wp\/v2\/pages\/1831"}],"wp:attachment":[{"href":"https:\/\/www.nickelcasting.com\/fr\/wp-json\/wp\/v2\/media?parent=2331"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}