{"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\/it\/leghe-di-nichel\/invar-metal-alloys\/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=\"\/it\/\">Casa<\/a> \n        <span class=\"separator\">\/<\/span> \n        <a href=\"\/it\/leghe-di-nichel\/\">Leghe di nichel<\/a>\n        <span class=\"separator\">\/<\/span> \n        <a href=\"\/it\/leghe-di-nichel\/invar-controlled-expansion-alloys\/\">Invar \/ Leghe ad espansione controllata<\/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=\"Lega di ferro e nichel 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                L'Invar 42 \u00e8 una lega di nichel e ferro ad espansione controllata 42%. \u00c8 stata specificamente progettata per avere un coefficiente di espansione termica (CTE) molto simile a quello del silicio, delle ceramiche di allumina 96% e dei vetri sigillanti morbidi, il che la rende fondamentale per la sigillatura ermetica dei componenti elettronici.\n            <\/p>\n\n            <ul class=\"key-specs-list\">\n                <li><strong>Forme comuni:<\/strong> Sheet, Strip, <a href=\"https:\/\/www.nickelcasting.com\/ko\/product-forms\/wire\/\">Filo<\/a>, Rod.<\/li>\n                <li><strong>Caratteristiche principali:<\/strong> Il CTE corrisponde al silicio e alla ceramica (allumina).<\/li>\n                <li><strong>Applicazione:<\/strong> Sigillatura vetro-metallo e cornici in piombo.<\/li>\n                <li><strong>CTE:<\/strong> Tasso di espansione costante fino a 572\u00b0F (300\u00b0C).<\/li>\n            <\/ul>\n\n            <div class=\"action-area\">\n                <a href=\"\/it\/contact\/\" class=\"quote-btn\">Richiesta di preventivo<\/a>\n                <a href=\"#\" class=\"download-btn\">Scarica la scheda tecnica<\/a>\n            <\/div>\n        <\/div>\n    <\/div>\n\n    <div class=\"section-head\">Perch\u00e9 scegliere Invar 42?<\/div>\n    <p>\n        Mentre <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> \u00e8 progettato per un'espansione \"zero\", mentre l'Invar 42 \u00e8 progettato per un'espansione \"abbinata\". Nel packaging dei semiconduttori, se il telaio metallico si espande pi\u00f9 velocemente del chip di silicio al suo interno, il chip si rompe. Invar 42 si espande e si contrae esattamente alla stessa velocit\u00e0 del chip, garantendo l'integrit\u00e0 della confezione durante i cicli termici.\n    <\/p>\n\n    <div class=\"feature-grid\">\n        <div class=\"feature-col\">\n            <h4>Sigillatura vetro-metallo<\/h4>\n            <p>Forma un sigillo ermetico affidabile e stretto con vetri duri e morbidi, evitando perdite di gas in lampadine e tubi a vuoto.<\/p>\n        <\/div>\n        <div class=\"feature-col\">\n            <h4>Imballaggio dei semiconduttori<\/h4>\n            <p>Il materiale standard per i telai di piombo utilizzati nei circuiti integrati, che si adatta all'espansione dei chip di silicio e dei substrati di ceramica.<\/p>\n        <\/div>\n        <div class=\"feature-col\">\n            <h4>Termostato Bi-Metalli<\/h4>\n            <p>Utilizzato come componente \"passivo\" o a bassa espansione nelle strisce termostatiche bimetalliche in presenza di temperature elevate (fino a 300\u00b0C).<\/p>\n        <\/div>\n    <\/div>\n\n    <div class=\"section-head\">Composizione chimica (%)<\/div>\n    <div class=\"data-table-wrap\">\n        <table class=\"tech-table\">\n            <thead>\n                <tr>\n                    <th>Elemento<\/th>\n                    <th>Contenuto (%)<\/th>\n                <\/tr>\n            <\/thead>\n            <tbody>\n                <tr>\n                    <td><strong>Nichel (Ni)<\/strong><\/td>\n                    <td><strong>41.0 - 42.5<\/strong><\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Ferro (Fe)<\/strong><\/td>\n                    <td>Equilibrio<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Carbonio (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>Silicio (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;\">*Nota: il contenuto di nichel del 42% \u00e8 regolato per spostare il punto di Curie e la curva di espansione.<\/p>\n    <\/div>\n\n    <div class=\"section-head\">Specifiche standard<\/div>\n    <div class=\"data-table-wrap\">\n        <table class=\"tech-table\">\n            <thead>\n                <tr>\n                    <th width=\"30%\">Forma del prodotto<\/th>\n                    <th>Norme (ASTM \/ AMS)<\/th>\n                <\/tr>\n            <\/thead>\n            <tbody>\n                <tr>\n                    <td><strong>Piastra, foglio, striscia<\/strong><\/td>\n                    <td>ASTM F30, AMS I-23011 (Classe 5)<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Barra, tondino, filo<\/strong><\/td>\n                    <td>ASTM F29, ASTM F30<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Lega di tenuta<\/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=\"\/it\/product-forms\/wire\/\" class=\"form-card-link\">\n            <div class=\"form-card-icon\">\ud83e\uddf5<\/div>\n            <div class=\"form-card-content\">\n                <h4>Striscia e foglio di precisione<\/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=\"\/it\/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=\"\/it\/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>Lastre e piastre<\/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=\"\/it\/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\">Coefficiente medio di espansione termica (CTE)<\/div>\n    <div class=\"data-table-wrap\">\n        <table class=\"tech-table\">\n            <thead>\n                <tr>\n                    <th>Intervallo di temperatura<\/th>\n                    <th>CTE (\u00b5m\/m-\u00b0C)<\/th>\n                    <th>Materiale comparabile<\/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>Corrisponde a silicio\/allumina (ceramica)<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>30 - 450\u00b0C<\/strong><\/td>\n                    <td>6.0 - 7.0<\/td>\n                    <td>Abbinamenti 1075 Vetro<\/td>\n                <\/tr>\n            <\/tbody>\n        <\/table>\n        <p style=\"font-size:0.85rem; color:#666; margin-top:10px;\">*Nota: l'espansione \u00e8 coerente con l'intervallo di funzionamento tipico dell'elettronica.<\/p>\n    <\/div>\n\n    <div class=\"section-head\">Applicazioni tipiche<\/div>\n    <div class=\"app-list\">\n        <div class=\"app-card\">\n            <h4>Cornici di piombo<\/h4>\n            <p>Lo scheletro metallico all'interno delle confezioni di chip che collega il microchip al circuito stampato.<\/p>\n        <\/div>\n        <div class=\"app-card\">\n            <h4>Pacchetti in ceramica<\/h4>\n            <p>Guarnizioni ermetiche per l'elettronica aerospaziale e militare ad alta affidabilit\u00e0.<\/p>\n        <\/div>\n        <div class=\"app-card\">\n            <h4>Tubi a vuoto<\/h4>\n            <p>Perni e alimentatori metallici che devono passare attraverso le pareti di vetro senza rompere la tenuta del vuoto.<\/p>\n        <\/div>\n        <div class=\"app-card\">\n            <h4>Illuminazione per autoveicoli<\/h4>\n            <p>I filamenti dei fari e i gruppi ottici sigillati che richiedono la sigillatura del vetro ad 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;\">Avete bisogno di strisce o fili di 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=\"\/it\/contact\/\" class=\"quote-btn\">Ottenere un preventivo rapido<\/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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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\/it\/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\/it\/wp-json\/wp\/v2\/pages\/2311","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/comments?post=2311"}],"version-history":[{"count":11,"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/pages\/2311\/revisions"}],"predecessor-version":[{"id":3425,"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/pages\/2311\/revisions\/3425"}],"up":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/pages\/2298"}],"wp:attachment":[{"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/media?parent=2311"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}