--- title: "Controlled-expansion nickel-iron alloys — 15 grades" description: "Controlled-expansion nickel-iron alloys are materials formulated to provide predictable thermal expansion and good dimensional stability. They are used…" canonical: https://steelequivalents.com/categories/controlled-expansion-nickel-iron-alloys language: en robots: index, follow og_type: website type: category-detail language_alternates: en: https://steelequivalents.com/categories/controlled-expansion-nickel-iron-alloys.md cs: https://steelequivalents.com/cs/kategorie/slitiny-niklu-a-železa-s-řízenou-tepelnou-roztažností.md de: https://steelequivalents.com/de/kategorien/nickel-eisen-legierungen-mit-definierter-wärmeausdehnung.md es: https://steelequivalents.com/es/categorías/aleaciones-de-níquel-hierro-de-dilatación-controlada.md fr: https://steelequivalents.com/fr/catégories/alliages-nickel-fer-à-dilatation-contrôlée.md hu: https://steelequivalents.com/hu/kategóriák/szabályozott-hőtágulású-nikkel-vas-ötvözetek.md it: https://steelequivalents.com/it/categorie/leghe-nichel-ferro-a-dilatazione-controllata.md nl: https://steelequivalents.com/nl/categorieën/nikkel-ijzerlegeringen-met-gecontroleerde-uitzetting.md pl: https://steelequivalents.com/pl/kategorie/stopy-niklowo-żelazowe-o-regulowanej-rozszerzalności-cieplnej.md pt: https://steelequivalents.com/pt/categorias/ligas-de-níquel-ferro-de-expansão-controlada.md ru: https://steelequivalents.com/ru/категории/сплавы-никеля-с-железом-с-регулируемым-коэффициентом-теплового-расширения.md tr: https://steelequivalents.com/tr/kategoriler/kontrollü-genleşmeli-nikel-demir-alaşımları.md zh: https://steelequivalents.com/zh/类别/可控膨胀镍铁合金.md ja: https://steelequivalents.com/ja/カテゴリー/低膨張ニッケル鉄合金.md ar: https://steelequivalents.com/ar/الفئات/سبائك-النيكل-والحديد-ذات-التمدد-المتحكم-فيه.md ko: https://steelequivalents.com/ko/분류/저팽창-니켈-철-합금.md pt-br: https://steelequivalents.com/pt-br/categorias/ligas-de-níquel-ferro-de-expansão-controlada.md hi: https://steelequivalents.com/hi/श्रेणियाँ/नियंत्रित-प्रसार-वाली-निकेल-लौह-मिश्रधातुएँ.md content_hash: sha256:7e6aabb5081caee51d36e11d803686bd68d25782f6ddb98e889d122ce0e5dd62 generated: 2026-09-25 --- > **Machine-readable Markdown rendering.** This is a Markdown representation of a web page, > served for AI agents and crawlers as a token-efficient alternative to the full HTML. > Full interactive HTML version: https://steelequivalents.com/categories/controlled-expansion-nickel-iron-alloys > Canonical URL: https://steelequivalents.com/categories/controlled-expansion-nickel-iron-alloys > Available languages: en, cs, de, es, fr, hu, it, nl, pl, pt, ru, tr, zh, ja, ar, ko, pt-br, hi > Change detection: `content_hash` is the SHA-256 of this document's Markdown body — everything > below this block, whitespace-trimmed, excluding the front-matter. Compare it to detect a real > content change; `generated` moves on every render and is not a change signal. ![Controlled-expansion nickel-iron alloys](/images/uploads/6cc8b013-f84e-4a15-8a78-ce412c911e65/controlled-expansion-nickel-iron-alloys-category-precision-strip-1920x1080.jpg) Category · 15 grades # Controlled-expansion nickel-iron alloys Controlled-expansion nickel-iron alloys are materials formulated to provide predictable thermal expansion and good dimensional stability. They are used for glass-to-metal seals, electronic packages and precision instruments where limiting thermal mismatch is important. | Grade | Material no. | C | Si | Mn | Fe | Ni | |---|---|---|---|---|---|---| | [FCLE3](/materials/jis/fcle3 "FCLE3") | — | — | — | — | — | — | | [FCDLE3](/materials/jis/fcdle3 "FCDLE3") | — | — | — | — | — | — | | [SCLE3](/materials/jis/scle3 "SCLE3") | — | — | — | — | — | — | | [FCDLE2](/materials/jis/fcdle2 "FCDLE2") | — | — | — | — | — | — | | [SCLE2](/materials/jis/scle2 "SCLE2") | — | — | — | — | — | — | | [FCLE2](/materials/jis/fcle2 "FCLE2") | — | — | — | — | — | — | | [FCDLE1](/materials/jis/fcdle1 "FCDLE1") | — | — | — | — | — | — | | [SCLE1](/materials/jis/scle1 "SCLE1") | — | — | — | — | — | — | | [FCLE1](/materials/jis/fcle1 "FCLE1") | — | — | — | — | — | — | | [FCLE4](/materials/jis/fcle4 "FCLE4") | — | — | — | — | — | — | | [FCDLE4](/materials/jis/fcdle4 "FCDLE4") | — | — | — | — | — | — | | [SCLE4](/materials/jis/scle4 "SCLE4") | — | — | — | — | — | — | | [Ni36](/materials/din-en/ni36 "Ni36") | [1.3912](/materials/material-no/1.3912 "1.3912") | ≤0,10\\n(≤0,05) | ≤0,50\\n(≤0,03) | ≤0,50 | Rest/Bal. | 35,0-37,0 | | [Ni42](/materials/din-en/ni42 "Ni42") | [1.3917](/materials/material-no/1.3917 "1.3917") | ≤0,05 | ≤0,30 | ≤1,00 | Rest/Bal. | 41,0-43,0\\n(40,0-43,0) | | [Ni48](/materials/din-en/ni48 "Ni48") | [1.3922](/materials/material-no/1.3922 "1.3922") | ≤0,05 | ≤0,30 | ≤0,50 | Rest/Bal. | 46,0-49,0 | ## Standards covering this category 7 - [**JIS***12 grades*](/materials/jis "JIS — 12 grades in this category") - [**DIN / EN***3 grades*](/materials/din-en "DIN / EN — 3 grades in this category") - [**UNS***3 grades*](/materials/uns "UNS — 3 grades in this category") - [**ASTM***3 grades*](/materials/astm "ASTM — 3 grades in this category") - [**AFNOR***2 grades*](/materials/afnor "AFNOR — 2 grades in this category") - [**SRPS***2 grades*](/materials/srps "SRPS — 2 grades in this category") - [**ČSN***1 grade*](/materials/csn "ČSN — 1 grade in this category") ## Property ranges 4 | Property | Unit | Min | Max | Grades | |---|---|---|---|---| | Rm | N/mm² | 120 | 370 | 12 | | Re | N/mm² | 180 | 200 | 8 | | A | % | 7 | 10 | 8 | | rho | g/cm³ | 7.85 | 8.2 | 3 | Derived from 12 grades in this category with a recorded value. ## Composition range 5 | Property | Unit | Min | Max | Grades | |---|---|---|---|---| | C | % | 0.05 | 0.05 | 2 | | Si | % | 0.3 | 0.3 | 2 | | Mn | % | 0.5 | 1 | 3 | | Fe | % | 50.15 | 54 | 1 | | Ni | % | 35 | 49 | 2 | Derived from 3 grades in this category with a recorded value. ## Related guides 1 - [**Steel Thermal Expansion and Temperature-Dependent Properties**](/wiki/calculated-values/steel-thermal-expansion-and-temperature-dependent-properties "Steel Thermal Expansion and Temperature-Dependent Properties")