--- title: "Ni48 — Controlled-expansion nickel-iron alloys" description: "Ni48: 4 equivalent designations across 4 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/din-en/ni48 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/ni48.md cs: https://steelequivalents.com/cs/materiály/din-en/ni48.md de: https://steelequivalents.com/de/werkstoffe/din-en/ni48.md es: https://steelequivalents.com/es/materiales/din-en/ni48.md fr: https://steelequivalents.com/fr/matériaux/din-en/ni48.md hu: https://steelequivalents.com/hu/anyagok/din-en/ni48.md it: https://steelequivalents.com/it/materiali/din-en/ni48.md nl: https://steelequivalents.com/nl/materialen/din-en/ni48.md pl: https://steelequivalents.com/pl/materiały/din-en/ni48.md pt: https://steelequivalents.com/pt/materiais/din-en/ni48.md ru: https://steelequivalents.com/ru/материалы/din-en/ni48.md tr: https://steelequivalents.com/tr/malzemeler/din-en/ni48.md zh: https://steelequivalents.com/zh/材料/din-en/ni48.md ja: https://steelequivalents.com/ja/材料/din-en/ni48.md ar: https://steelequivalents.com/ar/المواد/din-en/ni48.md ko: https://steelequivalents.com/ko/재료/din-en/ni48.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/ni48.md hi: https://steelequivalents.com/hi/सामग्री/din-en/ni48.md content_hash: sha256:8d0b0f54b1f2c0a11c0b13ffb10535071601fff3062b743f08108cc2cf73c2de generated: 2026-09-22 --- > **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/materials/din-en/ni48 > Canonical URL: https://steelequivalents.com/materials/din-en/ni48 > 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. DIN / EN · Europe · 4 designations # Ni48 Ni48 is a material in the category [Controlled-expansion nickel-iron alloys](/categories/controlled-expansion-nickel-iron-alloys "Controlled-expansion nickel-iron alloys"), held under material number 1.3922. Its recorded composition includes C ≤ 0.05%, Si ≤ 0.3%, Mn ≤ 0.5% and Ni 46–49%. We list 3 designations recorded for this grade, in the standards UNS, ASTM and AFNOR. Its recorded density is 7.85 g/cm³. - [*Material no.* **1.3922**](/materials/material-no/1.3922 "Material no.: 1.3922") - [*Category* **Controlled-expansion nickel-iron alloys · 15 grades**](/categories/controlled-expansion-nickel-iron-alloys "Category: Controlled-expansion nickel-iron alloys · 15 grades") - *Designations* **4** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=e92194ec-ff7f-48b1-96ac-1bcf1504adf4&designation=14e3b0df-4da2-4e2b-8763-77a56adb91a4 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/ni48.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [UNS K94800 This grade’s own name · 4 grades on that route](/materials/uns/k94800 "UNS K94800") ## About 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. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 4 designations · 4 standards · nothing hidden This grade’s own name recorded in our sources as this grade’s own designation under that standard. Indicative taken from a published cross-reference table; a close match, not a guarantee of interchangeability. Verify against the mill certificate before ordering. Withdrawn designation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once. DIN / EN Europe · 1 - **Ni48 This grade’s own name** UNS United States · 1 - [K94800 This grade’s own name](/materials/uns/k94800 "UNS K94800") ASTM United States · 1 - [F30 Indicative](/materials/astm/f30 "ASTM F30") AFNOR France · 1 - [NF A54-301 Indicative](/materials/afnor/nf-a54-301 "AFNOR NF A54-301") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 5 elements on file · weight % What this alloy is Fe Ni Mn Si Iron — the balance, never listed by a standard — 51.7 % Ni — 47.5 % Mn — 0.5 % Si — 0.3 % Traces & impurities · 0.1 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.05 | | Si | ≤ 0.3 | | Mn | ≤ 0.5 | | Ni | 46–49 | | Fe | Balance | Carbon Silicon Manganese Nickel Iron 0.01 % 0.1 % 1 % 10 % 100 % The scale is logarithmic, not the element’s raw share of the alloy — the only honest way to fit 0.01 % and 100 % in one picture, and it means every value here can be compared with every other. | Element | As published source text, verbatim | Min% by weight | Max% by weight | Bound | |---|---|---|---|---| | C | ≤0,05 | — | 0.050 | Max | | Si | ≤0,30 | — | 0.300 | Max | | Mn | ≤0,50 | — | 0.500 | Max | | Fe | Rest/Bal. | 50.150 | 54.000 | Balance | | Ni | 46,0-49,0 | 46.000 | 49.000 | Range | The published column is the source string byte-for-byte, decimal comma and all; Min and Max are the parsed bounds. Elements not listed have no value on file — they are omitted, never inferred. ## Predicted transformation temperatures Not enough recorded composition to predict a transformation temperature for this grade — missing: Cr, Mo. ## Physical & mechanical properties Density 7,85 g/cm³ Exact An absent property means we hold no value for it — it is left out rather than estimated, interpolated from a neighbouring grade, or filled from a handbook. It does not mean the property is undefined for the material. ## Looking for this grade under another name? Search the catalogue by designation, material number or composition — every name on this page is itself a way in. [Search](/search "Steel grade search")[Inquiry](/inquiry?material=e92194ec-ff7f-48b1-96ac-1bcf1504adf4&designation=14e3b0df-4da2-4e2b-8763-77a56adb91a4 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/ni48.pdf "Datasheet as PDF")