{"id":2311,"date":"2026-01-09T12:57:52","date_gmt":"2026-01-09T11:57:52","guid":{"rendered":"https:\/\/www.nickelcasting.com\/?page_id=2311"},"modified":"2026-03-28T15:33:26","modified_gmt":"2026-03-28T14:33:26","slug":"invar-42","status":"publish","type":"page","link":"https:\/\/www.nickelcasting.com\/es\/aleaciones-de-niquel\/aleaciones-metalicas-invar\/invar-42\/","title":{"rendered":"Invar 42"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"2311\" class=\"elementor elementor-2311\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a88b6ac e-flex e-con-boxed e-con e-parent\" data-id=\"a88b6ac\" 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-0c1b244 elementor-widget elementor-widget-html\" data-id=\"0c1b244\" 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=\"\/es\/\">Inicio<\/a> \n        <span class=\"separator\">\/<\/span> \n        <a href=\"\/es\/aleaciones-de-niquel\/\">Aleaciones de n\u00edquel<\/a>\n        <span class=\"separator\">\/<\/span> \n        <a href=\"\/es\/aleaciones-de-niquel\/invar-controlled-expansion-alloys\/\">Invar \/ Controlled Expansion Alloys<\/a>\n        <span class=\"separator\">\/<\/span> \n        Invar 42\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\/nickel27.jpg\" alt=\"Aleaci\u00f3n de hierro y n\u00edquel Invar 42\">\n        <\/div>\n        \n        <div class=\"prod-info-box\">\n            <h1>Invar\u00ae 42<\/h1>\n            <div class=\"prod-subtitle\">UNS K94200 | W.Nr. 1.3917 | Nilo 42<\/div>\n            \n            <p>\n                Invar 42 es una aleaci\u00f3n de n\u00edquel-hierro de expansi\u00f3n controlada 42%. Se ha dise\u00f1ado espec\u00edficamente para tener un coeficiente de expansi\u00f3n t\u00e9rmica (CTE) muy similar al del silicio, la cer\u00e1mica de al\u00famina 96% y los vidrios de sellado blandos, por lo que es fundamental para el sellado herm\u00e9tico en electr\u00f3nica.\n            <\/p>\n\n            <ul class=\"key-specs-list\">\n                <li><strong>Formas comunes:<\/strong> Sheet, Strip, <a href=\"https:\/\/www.nickelcasting.com\/ko\/product-forms\/wire\/\">Alambre<\/a>, Rod.<\/li>\n                <li><strong>Caracter\u00edstica clave:<\/strong> El CTE coincide con el Silicio y la Cer\u00e1mica (Al\u00famina).<\/li>\n                <li><strong>Aplicaci\u00f3n:<\/strong> Sellado vidrio-metal y marcos de plomo.<\/li>\n                <li><strong>CTE:<\/strong> Velocidad de expansi\u00f3n constante hasta 300\u00b0C (572\u00b0F).<\/li>\n            <\/ul>\n\n            <div class=\"action-area\">\n                <a href=\"\/es\/pongase-en-contacto-con\/\" class=\"quote-btn\">Solicitar presupuesto<\/a>\n                <a href=\"#\" class=\"download-btn\">Descargar hoja de datos<\/a>\n            <\/div>\n        <\/div>\n    <\/div>\n\n    <div class=\"section-head\">\u00bfPor qu\u00e9 elegir Invar 42?<\/div>\n    <p>\n        En <a href=\"https:\/\/www.nickelcasting.com\/ko\/%eb%8b%88%ec%bc%88-%ed%95%a9%ea%b8%88\/invar-metal-alloys\/invar-36\/\">Invar 36<\/a> est\u00e1 dise\u00f1ado para una dilataci\u00f3n \"cero\", Invar 42 est\u00e1 dise\u00f1ado para una dilataci\u00f3n \"igualada\". En los envases de semiconductores, si la estructura met\u00e1lica se expande m\u00e1s r\u00e1pidamente que el chip de silicio que contiene, el chip se agrietar\u00e1. Invar 42 se expande y contrae exactamente al mismo ritmo que el chip, garantizando la integridad del envase durante los ciclos t\u00e9rmicos.\n    <\/p>\n\n    <div class=\"feature-grid\">\n        <div class=\"feature-col\">\n            <h4>Sellado vidrio-metal<\/h4>\n            <p>Forma un cierre herm\u00e9tico fiable y estanco con vidrios duros y blandos, evitando fugas de gas en bombillas y tubos de vac\u00edo.<\/p>\n        <\/div>\n        <div class=\"feature-col\">\n            <h4>Embalaje de semiconductores<\/h4>\n            <p>Material est\u00e1ndar para los marcos de plomo utilizados en los circuitos integrados, que se adapta a la expansi\u00f3n de los chips de silicio y los sustratos cer\u00e1micos.<\/p>\n        <\/div>\n        <div class=\"feature-col\">\n            <h4>Termostato Bi-Metales<\/h4>\n            <p>Se utiliza como componente \"pasivo\" o de baja expansi\u00f3n en las bandas bimet\u00e1licas de termostato cuando se alcanzan temperaturas elevadas (hasta 300\u00b0C).<\/p>\n        <\/div>\n    <\/div>\n\n    <div class=\"section-head\">Composici\u00f3n qu\u00edmica (%)<\/div>\n    <div class=\"data-table-wrap\">\n        <table class=\"tech-table\">\n            <thead>\n                <tr>\n                    <th>Elemento<\/th>\n                    <th>Contenido (%)<\/th>\n                <\/tr>\n            <\/thead>\n            <tbody>\n                <tr>\n                    <td><strong>N\u00edquel (Ni)<\/strong><\/td>\n                    <td><strong>41.0 - 42.5<\/strong><\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Hierro (Fe)<\/strong><\/td>\n                    <td>Saldo<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Carbono (C)<\/strong><\/td>\n                    <td>0,05 m\u00e1x.<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Manganeso (Mn)<\/strong><\/td>\n                    <td>0,80 m\u00e1x.<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Silicio (Si)<\/strong><\/td>\n                    <td>0,30 m\u00e1x.<\/td>\n                <\/tr>\n            <\/tbody>\n        <\/table>\n        <p style=\"font-size:0.85rem; color:#666; margin-top:10px;\">*Nota: El contenido de N\u00edquel del 42% est\u00e1 ajustado para desplazar el punto Curie y la curva de expansi\u00f3n.<\/p>\n    <\/div>\n\n    <div class=\"section-head\">Especificaciones est\u00e1ndar<\/div>\n    <div class=\"data-table-wrap\">\n        <table class=\"tech-table\">\n            <thead>\n                <tr>\n                    <th width=\"30%\">Forma del producto<\/th>\n                    <th>Normas (ASTM \/ AMS)<\/th>\n                <\/tr>\n            <\/thead>\n            <tbody>\n                <tr>\n                    <td><strong>Chapa, hoja, tira<\/strong><\/td>\n                    <td>ASTM F30, AMS I-23011 (Clase 5)<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Barra, varilla, alambre<\/strong><\/td>\n                    <td>ASTM F29, ASTM F30<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Aleaci\u00f3n de sellado<\/strong><\/td>\n                    <td>DIN 17745, COSTURA 385<\/td>\n                <\/tr>\n            <\/tbody>\n        <\/table>\n    <\/div>\n\n    \n    <div class=\"section-head\">Available Forms for Invar\u00ae 42<\/div>\n    <p style=\"margin-bottom: 25px;\">\n        To meet the stringent tolerance and thermal expansion requirements of the microelectronics and aerospace packaging industries, we supply Invar 42 primarily in precision flat-rolled and wire forms tailored for automated stamping and sealing operations.\n    <\/p>\n\n    <div class=\"forms-grid\">\n        <a href=\"\/es\/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 &amp; Foil<\/h4>\n                <p>The primary form for Invar 42. Supplied in ultra-thin, highly controlled coils specifically for high-speed stamping and photo-etching of semiconductor lead frames.<\/p>\n            <\/div>\n        <\/a>\n\n        <a href=\"\/es\/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<\/h4>\n                <p>High-purity wire engineered for creating hermetic glass-to-metal seals in vacuum tubes, incandescent bulbs, and high-reliability aerospace sensors.<\/p>\n            <\/div>\n        <\/a>\n\n        <a href=\"\/es\/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>Chapa y placa<\/h4>\n                <p>Flat stock utilized for fabricating structural components within electronic enclosures and as the passive element in high-temperature bimetallic thermostats.<\/p>\n            <\/div>\n        <\/a>\n\n        <a href=\"\/es\/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>Round bar stock supplied for CNC machining of specialized electronic connectors, glass sealing pins, and dimensionally stable structural supports.<\/p>\n            <\/div>\n        <\/a>\n    <\/div>\n    <div class=\"section-head\">Coeficiente medio de dilataci\u00f3n t\u00e9rmica (CTE)<\/div>\n    <div class=\"data-table-wrap\">\n        <table class=\"tech-table\">\n            <thead>\n                <tr>\n                    <th>Temperatura<\/th>\n                    <th>CTE (\u00b5m\/m-\u00b0C)<\/th>\n                    <th>Material comparable<\/th>\n                <\/tr>\n            <\/thead>\n            <tbody>\n                <tr>\n                    <td><strong>30 - 300\u00b0C<\/strong><\/td>\n                    <td><strong>4.0 - 5.0<\/strong><\/td>\n                    <td>F\u00f3sforos Silicio \/ Al\u00famina (Cer\u00e1mica)<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>30 - 450\u00b0C<\/strong><\/td>\n                    <td>6.0 - 7.0<\/td>\n                    <td>Cerillas 1075 Cristal<\/td>\n                <\/tr>\n            <\/tbody>\n        <\/table>\n        <p style=\"font-size:0.85rem; color:#666; margin-top:10px;\">*Nota: La expansi\u00f3n es consistente en el rango de funcionamiento t\u00edpico de la electr\u00f3nica.<\/p>\n    <\/div>\n\n    <div class=\"section-head\">Aplicaciones t\u00edpicas<\/div>\n    <div class=\"app-list\">\n        <div class=\"app-card\">\n            <h4>Marcos de plomo<\/h4>\n            <p>El esqueleto met\u00e1lico del interior de los paquetes de chips que conecta el microchip a la placa de circuito.<\/p>\n        <\/div>\n        <div class=\"app-card\">\n            <h4>Envases cer\u00e1micos<\/h4>\n            <p>Cierres herm\u00e9ticos para electr\u00f3nica aeroespacial y militar de alta fiabilidad.<\/p>\n        <\/div>\n        <div class=\"app-card\">\n            <h4>Tubos de vac\u00edo<\/h4>\n            <p>Pasadores y alimentadores met\u00e1licos que deben atravesar las paredes de cristal sin romper el sellado al vac\u00edo.<\/p>\n        <\/div>\n        <div class=\"app-card\">\n            <h4>Iluminaci\u00f3n del autom\u00f3vil<\/h4>\n            <p>Filamentos de faros y unidades de haz sellado que requieren sellado de vidrio a alta temperatura.<\/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;\">\u00bfNecesita cinta o alambre de invar 42?<\/h3>\n        <p style=\"max-width: 600px; margin: 0 auto 20px;\">\n            We maintain stock of Invar 42 \/ Nilo 42 ideal for deep drawing, stamping, and photo-etching.\n            Contact us for coil slit to your specific width.\n        <\/p>\n        <a href=\"\/es\/pongase-en-contacto-con\/\" class=\"quote-btn\">Presupuesto r\u00e1pido<\/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 \/ Invar \/ Controlled Expansion Alloys \/ Invar 42 Invar\u00ae 42 UNS K94200 | W.Nr. 1.3917 | Nilo 42 Invar 42 is a 42% nickel-iron controlled expansion alloy. It is specifically designed to have a coefficient of thermal expansion (CTE) that closely matches that of Silicon, 96% Alumina ceramics, and soft [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"parent":2298,"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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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-2311","page","type-page","status-publish","hentry"],"spectra_custom_meta":{"_edit_lock":["1774708401:1"],"_edit_last":["1"],"rank_math_internal_links_processed":["1"],"rank_math_seo_score":["82"],"rank_math_description":["Invar 42 provides a stable and low coefficient of thermal expansion, ideal for advanced engineering and measurement tools."],"rank_math_focus_keyword":["invar 42"],"_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\":\"a88b6ac\",\"elType\":\"container\",\"settings\":{\"flex_direction\":\"column\",\"display_condition_list\":[{\"display_condition_login_status\":\"subscriber\",\"_id\":\"c6c6738\"}]},\"elements\":[{\"id\":\"0c1b244\",\"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        <a href=\\\"\\\/nickel-alloys\\\/invar-controlled-expansion-alloys\\\/\\\">Invar \\\/ Controlled Expansion Alloys<\\\/a>\\n        <span class=\\\"separator\\\">\\\/<\\\/span> \\n        Invar 42\\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\\\/nickel27.jpg\\\" alt=\\\"Invar 42 Nickel Iron Alloy\\\">\\n        <\\\/div>\\n        \\n        <div class=\\\"prod-info-box\\\">\\n            <h1>Invar\\u00ae 42<\\\/h1>\\n            <div class=\\\"prod-subtitle\\\">UNS K94200 | W.Nr. 1.3917 | Nilo 42<\\\/div>\\n            \\n            <p>\\n                Invar 42 is a 42% nickel-iron controlled expansion alloy. It is specifically designed to have a coefficient of thermal expansion (CTE) that closely matches that of Silicon, 96% Alumina ceramics, and soft sealing glasses, making it critical for hermetic sealing in electronics.\\n            <\\\/p>\\n\\n            <ul class=\\\"key-specs-list\\\">\\n                <li><strong>Common Forms:<\\\/strong> Sheet, Strip, Wire, Rod.<\\\/li>\\n                <li><strong>Key Feature:<\\\/strong> CTE matches Silicon and Ceramics (Alumina).<\\\/li>\\n                <li><strong>Application:<\\\/strong> Glass-to-Metal Sealing & Lead Frames.<\\\/li>\\n                <li><strong>CTE:<\\\/strong> Constant rate of expansion up to 572\\u00b0F (300\\u00b0C).<\\\/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 Invar 42?<\\\/div>\\n    <p>\\n        While Invar 36 is designed for \\\"zero\\\" expansion, Invar 42 is designed for \\\"matched\\\" expansion. In semiconductor packaging, if the metal frame expands faster than the silicon chip inside it, the chip will crack. Invar 42 expands and contracts at the exact same rate as the chip, ensuring the integrity of the package during thermal cycling.\\n    <\\\/p>\\n\\n    <div class=\\\"feature-grid\\\">\\n        <div class=\\\"feature-col\\\">\\n            <h4>Glass-to-Metal Sealing<\\\/h4>\\n            <p>Forms a reliable, tight hermetic seal with hard and soft glasses, preventing gas leakage in light bulbs and vacuum tubes.<\\\/p>\\n        <\\\/div>\\n        <div class=\\\"feature-col\\\">\\n            <h4>Semiconductor Packaging<\\\/h4>\\n            <p>The standard material for lead frames used in integrated circuits, matching the expansion of silicon chips and ceramic substrates.<\\\/p>\\n        <\\\/div>\\n        <div class=\\\"feature-col\\\">\\n            <h4>Thermostat Bi-Metals<\\\/h4>\\n            <p>Used as the \\\"passive\\\" or low-expansion component in bi-metallic thermostat strips where higher temperatures (up to 300\\u00b0C) are involved.<\\\/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><strong>41.0 - 42.5<\\\/strong><\\\/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>0.05 max<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Manganese (Mn)<\\\/strong><\\\/td>\\n                    <td>0.80 max<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Silicon (Si)<\\\/strong><\\\/td>\\n                    <td>0.30 max<\\\/td>\\n                <\\\/tr>\\n            <\\\/tbody>\\n        <\\\/table>\\n        <p style=\\\"font-size:0.85rem; color:#666; margin-top:10px;\\\">*Note: The 42% Nickel content is tuned to shift the Curie point and expansion curve.<\\\/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)<\\\/th>\\n                <\\\/tr>\\n            <\\\/thead>\\n            <tbody>\\n                <tr>\\n                    <td><strong>Plate, Sheet, Strip<\\\/strong><\\\/td>\\n                    <td>ASTM F30, AMS I-23011 (Class 5)<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Bar, Rod, Wire<\\\/strong><\\\/td>\\n                    <td>ASTM F29, ASTM F30<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Sealing Alloy<\\\/strong><\\\/td>\\n                    <td>DIN 17745, SEW 385<\\\/td>\\n                <\\\/tr>\\n            <\\\/tbody>\\n        <\\\/table>\\n    <\\\/div>\\n\\n    \\n    <div class=\\\"section-head\\\">Available Forms for Invar\\u00ae 42<\\\/div>\\n    <p style=\\\"margin-bottom: 25px;\\\">\\n        To meet the stringent tolerance and thermal expansion requirements of the microelectronics and aerospace packaging industries, we supply Invar 42 primarily in precision flat-rolled and wire forms tailored for automated stamping and sealing operations.\\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>The primary form for Invar 42. Supplied in ultra-thin, highly controlled coils specifically for high-speed stamping and photo-etching of semiconductor lead frames.<\\\/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<\\\/h4>\\n                <p>High-purity wire engineered for creating hermetic glass-to-metal seals in vacuum tubes, incandescent bulbs, and high-reliability aerospace sensors.<\\\/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 utilized for fabricating structural components within electronic enclosures and as the passive element in high-temperature bimetallic thermostats.<\\\/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 CNC machining of specialized electronic connectors, glass sealing pins, and dimensionally stable structural supports.<\\\/p>\\n            <\\\/div>\\n        <\\\/a>\\n    <\\\/div>\\n    <div class=\\\"section-head\\\">Average Coefficient of Thermal Expansion (CTE)<\\\/div>\\n    <div class=\\\"data-table-wrap\\\">\\n        <table class=\\\"tech-table\\\">\\n            <thead>\\n                <tr>\\n                    <th>Temperature Range<\\\/th>\\n                    <th>CTE (\\u00b5m\\\/m\\u00b7\\u00b0C)<\\\/th>\\n                    <th>Comparable Material<\\\/th>\\n                <\\\/tr>\\n            <\\\/thead>\\n            <tbody>\\n                <tr>\\n                    <td><strong>30 - 300\\u00b0C<\\\/strong><\\\/td>\\n                    <td><strong>4.0 - 5.0<\\\/strong><\\\/td>\\n                    <td>Matches Silicon \\\/ Alumina (Ceramic)<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>30 - 450\\u00b0C<\\\/strong><\\\/td>\\n                    <td>6.0 - 7.0<\\\/td>\\n                    <td>Matches 1075 Glass<\\\/td>\\n                <\\\/tr>\\n            <\\\/tbody>\\n        <\\\/table>\\n        <p style=\\\"font-size:0.85rem; color:#666; margin-top:10px;\\\">*Note: Expansion is consistent in the typical operating range of electronics.<\\\/p>\\n    <\\\/div>\\n\\n    <div class=\\\"section-head\\\">Typical Applications<\\\/div>\\n    <div class=\\\"app-list\\\">\\n        <div class=\\\"app-card\\\">\\n            <h4>Lead Frames<\\\/h4>\\n            <p>The metal skeleton inside chip packages that connects the microchip to the circuit board.<\\\/p>\\n        <\\\/div>\\n        <div class=\\\"app-card\\\">\\n            <h4>Ceramic Packages<\\\/h4>\\n            <p>Hermetic seals for high-reliability aerospace and military electronics.<\\\/p>\\n        <\\\/div>\\n        <div class=\\\"app-card\\\">\\n            <h4>Vacuum Tubes<\\\/h4>\\n            <p>Metal pins and feeds that must pass through glass walls without breaking the vacuum seal.<\\\/p>\\n        <\\\/div>\\n        <div class=\\\"app-card\\\">\\n            <h4>Automotive Lighting<\\\/h4>\\n            <p>Headlight filaments and sealed beam units requiring high-temperature glass sealing.<\\\/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 Invar 42 Strip or Wire?<\\\/h3>\\n        <p style=\\\"max-width: 600px; margin: 0 auto 20px;\\\">\\n            We maintain stock of Invar 42 \\\/ Nilo 42 ideal for deep drawing, stamping, and photo-etching.\\n            Contact us for coil slit to your specific width.\\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\":\"a140128\"}]},\"elements\":[],\"widgetType\":\"html\"}],\"isInner\":false}]"],"rank_math_og_content_image":["a:2:{s:5:\"check\";s:32:\"48382d58a7317a2c960d4168fd8109d5\";s:6:\"images\";a:1:{i:0;i:2302;}}"],"ilj_blacklistdefinition":["a:0:{}"],"ilj_linkdefinition":["a:1:{i:0;s:8:\"Invar 42\";}"],"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-2311.css"],"_elementor_css":["a:6:{s:4:\"time\";i:1776543629;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_page_assets":["a:1:{s:7:\"scripts\";a:1:{i:0;s:18:\"elementor-frontend\";}}"],"_elementor_element_cache":["{\"timeout\":1776633629,\"value\":{\"content\":\"<div class=\\\"elementor-element elementor-element-a88b6ac e-flex e-con-boxed e-con e-parent\\\" data-id=\\\"a88b6ac\\\" 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-0c1b244 elementor-widget elementor-widget-html\\\" data-id=\\\"0c1b244\\\" 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        <a href=\\\"\\\/nickel-alloys\\\/invar-controlled-expansion-alloys\\\/\\\">Invar \\\/ Controlled Expansion Alloys<\\\/a>\\n        <span class=\\\"separator\\\">\\\/<\\\/span> \\n        Invar 42\\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\\\/nickel27.jpg\\\" alt=\\\"Invar 42 Nickel Iron Alloy\\\">\\n        <\\\/div>\\n        \\n        <div class=\\\"prod-info-box\\\">\\n            <h1>Invar\\u00ae 42<\\\/h1>\\n            <div class=\\\"prod-subtitle\\\">UNS K94200 | W.Nr. 1.3917 | Nilo 42<\\\/div>\\n            \\n            <p>\\n                Invar 42 is a 42% nickel-iron controlled expansion alloy. It is specifically designed to have a coefficient of thermal expansion (CTE) that closely matches that of Silicon, 96% Alumina ceramics, and soft sealing glasses, making it critical for hermetic sealing in electronics.\\n            <\\\/p>\\n\\n            <ul class=\\\"key-specs-list\\\">\\n                <li><strong>Common Forms:<\\\/strong> Sheet, Strip, Wire, Rod.<\\\/li>\\n                <li><strong>Key Feature:<\\\/strong> CTE matches Silicon and Ceramics (Alumina).<\\\/li>\\n                <li><strong>Application:<\\\/strong> Glass-to-Metal Sealing & Lead Frames.<\\\/li>\\n                <li><strong>CTE:<\\\/strong> Constant rate of expansion up to 572\\u00b0F (300\\u00b0C).<\\\/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 Invar 42?<\\\/div>\\n    <p>\\n        While Invar 36 is designed for \\\"zero\\\" expansion, Invar 42 is designed for \\\"matched\\\" expansion. In semiconductor packaging, if the metal frame expands faster than the silicon chip inside it, the chip will crack. Invar 42 expands and contracts at the exact same rate as the chip, ensuring the integrity of the package during thermal cycling.\\n    <\\\/p>\\n\\n    <div class=\\\"feature-grid\\\">\\n        <div class=\\\"feature-col\\\">\\n            <h4>Glass-to-Metal Sealing<\\\/h4>\\n            <p>Forms a reliable, tight hermetic seal with hard and soft glasses, preventing gas leakage in light bulbs and vacuum tubes.<\\\/p>\\n        <\\\/div>\\n        <div class=\\\"feature-col\\\">\\n            <h4>Semiconductor Packaging<\\\/h4>\\n            <p>The standard material for lead frames used in integrated circuits, matching the expansion of silicon chips and ceramic substrates.<\\\/p>\\n        <\\\/div>\\n        <div class=\\\"feature-col\\\">\\n            <h4>Thermostat Bi-Metals<\\\/h4>\\n            <p>Used as the \\\"passive\\\" or low-expansion component in bi-metallic thermostat strips where higher temperatures (up to 300\\u00b0C) are involved.<\\\/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><strong>41.0 - 42.5<\\\/strong><\\\/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>0.05 max<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Manganese (Mn)<\\\/strong><\\\/td>\\n                    <td>0.80 max<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Silicon (Si)<\\\/strong><\\\/td>\\n                    <td>0.30 max<\\\/td>\\n                <\\\/tr>\\n            <\\\/tbody>\\n        <\\\/table>\\n        <p style=\\\"font-size:0.85rem; color:#666; margin-top:10px;\\\">*Note: The 42% Nickel content is tuned to shift the Curie point and expansion curve.<\\\/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)<\\\/th>\\n                <\\\/tr>\\n            <\\\/thead>\\n            <tbody>\\n                <tr>\\n                    <td><strong>Plate, Sheet, Strip<\\\/strong><\\\/td>\\n                    <td>ASTM F30, AMS I-23011 (Class 5)<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Bar, Rod, Wire<\\\/strong><\\\/td>\\n                    <td>ASTM F29, ASTM F30<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Sealing Alloy<\\\/strong><\\\/td>\\n                    <td>DIN 17745, SEW 385<\\\/td>\\n                <\\\/tr>\\n            <\\\/tbody>\\n        <\\\/table>\\n    <\\\/div>\\n\\n    \\n    <div class=\\\"section-head\\\">Available Forms for Invar\\u00ae 42<\\\/div>\\n    <p style=\\\"margin-bottom: 25px;\\\">\\n        To meet the stringent tolerance and thermal expansion requirements of the microelectronics and aerospace packaging industries, we supply Invar 42 primarily in precision flat-rolled and wire forms tailored for automated stamping and sealing operations.\\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>The primary form for Invar 42. Supplied in ultra-thin, highly controlled coils specifically for high-speed stamping and photo-etching of semiconductor lead frames.<\\\/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<\\\/h4>\\n                <p>High-purity wire engineered for creating hermetic glass-to-metal seals in vacuum tubes, incandescent bulbs, and high-reliability aerospace sensors.<\\\/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 utilized for fabricating structural components within electronic enclosures and as the passive element in high-temperature bimetallic thermostats.<\\\/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 CNC machining of specialized electronic connectors, glass sealing pins, and dimensionally stable structural supports.<\\\/p>\\n            <\\\/div>\\n        <\\\/a>\\n    <\\\/div>\\n    <div class=\\\"section-head\\\">Average Coefficient of Thermal Expansion (CTE)<\\\/div>\\n    <div class=\\\"data-table-wrap\\\">\\n        <table class=\\\"tech-table\\\">\\n            <thead>\\n                <tr>\\n                    <th>Temperature Range<\\\/th>\\n                    <th>CTE (\\u00b5m\\\/m\\u00b7\\u00b0C)<\\\/th>\\n                    <th>Comparable Material<\\\/th>\\n                <\\\/tr>\\n            <\\\/thead>\\n            <tbody>\\n                <tr>\\n                    <td><strong>30 - 300\\u00b0C<\\\/strong><\\\/td>\\n                    <td><strong>4.0 - 5.0<\\\/strong><\\\/td>\\n                    <td>Matches Silicon \\\/ Alumina (Ceramic)<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>30 - 450\\u00b0C<\\\/strong><\\\/td>\\n                    <td>6.0 - 7.0<\\\/td>\\n                    <td>Matches 1075 Glass<\\\/td>\\n                <\\\/tr>\\n            <\\\/tbody>\\n        <\\\/table>\\n        <p style=\\\"font-size:0.85rem; color:#666; margin-top:10px;\\\">*Note: Expansion is consistent in the typical operating range of electronics.<\\\/p>\\n    <\\\/div>\\n\\n    <div class=\\\"section-head\\\">Typical Applications<\\\/div>\\n    <div class=\\\"app-list\\\">\\n        <div class=\\\"app-card\\\">\\n            <h4>Lead Frames<\\\/h4>\\n            <p>The metal skeleton inside chip packages that connects the microchip to the circuit board.<\\\/p>\\n        <\\\/div>\\n        <div class=\\\"app-card\\\">\\n            <h4>Ceramic Packages<\\\/h4>\\n            <p>Hermetic seals for high-reliability aerospace and military electronics.<\\\/p>\\n        <\\\/div>\\n        <div class=\\\"app-card\\\">\\n            <h4>Vacuum Tubes<\\\/h4>\\n            <p>Metal pins and feeds that must pass through glass walls without breaking the vacuum seal.<\\\/p>\\n        <\\\/div>\\n        <div class=\\\"app-card\\\">\\n            <h4>Automotive Lighting<\\\/h4>\\n            <p>Headlight filaments and sealed beam units requiring high-temperature glass sealing.<\\\/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 Invar 42 Strip or Wire?<\\\/h3>\\n        <p style=\\\"max-width: 600px; margin: 0 auto 20px;\\\">\\n            We maintain stock of Invar 42 \\\/ Nilo 42 ideal for deep drawing, stamping, and photo-etching.\\n            Contact us for coil slit to your specific width.\\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\/es\/author\/nickel\/"},"uagb_comment_info":0,"uagb_excerpt":"Home \/ Nickel Alloys \/ Invar \/ Controlled Expansion Alloys \/ Invar 42 Invar\u00ae 42 UNS K94200 | W.Nr. 1.3917 | Nilo 42 Invar 42 is a 42% nickel-iron controlled expansion alloy. It is specifically designed to have a coefficient of thermal expansion (CTE) that closely matches that of Silicon, 96% Alumina ceramics, and soft&hellip;","_links":{"self":[{"href":"https:\/\/www.nickelcasting.com\/es\/wp-json\/wp\/v2\/pages\/2311","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nickelcasting.com\/es\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.nickelcasting.com\/es\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/es\/wp-json\/wp\/v2\/comments?post=2311"}],"version-history":[{"count":11,"href":"https:\/\/www.nickelcasting.com\/es\/wp-json\/wp\/v2\/pages\/2311\/revisions"}],"predecessor-version":[{"id":3425,"href":"https:\/\/www.nickelcasting.com\/es\/wp-json\/wp\/v2\/pages\/2311\/revisions\/3425"}],"up":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/es\/wp-json\/wp\/v2\/pages\/2298"}],"wp:attachment":[{"href":"https:\/\/www.nickelcasting.com\/es\/wp-json\/wp\/v2\/media?parent=2311"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}