--- title: "SG-NiCr21Mo9Nb — Others" description: "SG-NiCr21Mo9Nb: 9 equivalent designations across 4 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/din-en/sg-nicr21mo9nb language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/sg-nicr21mo9nb.md cs: https://steelequivalents.com/cs/materiály/din-en/sg-nicr21mo9nb.md de: https://steelequivalents.com/de/werkstoffe/din-en/sg-nicr21mo9nb.md es: https://steelequivalents.com/es/materiales/din-en/sg-nicr21mo9nb.md fr: https://steelequivalents.com/fr/matériaux/din-en/sg-nicr21mo9nb.md hu: https://steelequivalents.com/hu/anyagok/din-en/sg-nicr21mo9nb.md it: https://steelequivalents.com/it/materiali/din-en/sg-nicr21mo9nb.md nl: https://steelequivalents.com/nl/materialen/din-en/sg-nicr21mo9nb.md pl: https://steelequivalents.com/pl/materiały/din-en/sg-nicr21mo9nb.md pt: https://steelequivalents.com/pt/materiais/din-en/sg-nicr21mo9nb.md ru: https://steelequivalents.com/ru/материалы/din-en/sg-nicr21mo9nb.md tr: https://steelequivalents.com/tr/malzemeler/din-en/sg-nicr21mo9nb.md zh: https://steelequivalents.com/zh/材料/din-en/sg-nicr21mo9nb.md ja: https://steelequivalents.com/ja/材料/din-en/sg-nicr21mo9nb.md ar: https://steelequivalents.com/ar/المواد/din-en/sg-nicr21mo9nb.md ko: https://steelequivalents.com/ko/재료/din-en/sg-nicr21mo9nb.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/sg-nicr21mo9nb.md hi: https://steelequivalents.com/hi/सामग्री/din-en/sg-nicr21mo9nb.md content_hash: sha256:c3ab4dadefc57e5cf209033cdadbb1484c2c49b9f04f923ee24426d8961baf2f generated: 2026-09-24 --- > **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/sg-nicr21mo9nb > Canonical URL: https://steelequivalents.com/materials/din-en/sg-nicr21mo9nb > 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 · 9 designations # SG-NiCr21Mo9Nb SG-NiCr21Mo9Nb is a material in the category Others, held under material number 2.4831. We list 8 designations recorded for this grade, in the standards DIN / EN, UNS, ASTM and SAE AMS. Its recorded composition includes C ≤ 0.1%, Cr 20–23%, Fe ≤ 5%, Ni ≥ 60% and Mo 8–10%. Its recorded density is 8.4 g/cm³. - [*Material no.* **2.4831**](/materials/material-no/2.4831 "Material no.: 2.4831") - [*Category* **Others · 1754 grades**](/categories/others "Category: Others · 1754 grades") - *Designations* **9** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=e8d06280-7c44-4515-8f18-a18ff4a4d85d&designation=fb8657dd-bd22-426e-88e7-2ddd880db9d4 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/sg-nicr21mo9nb.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN UP-NiCr21Mo9Nb This grade’s own name](/materials/din-en/up-nicr21mo9nb "DIN / EN UP-NiCr21Mo9Nb") - [UNS N06625 This grade’s own name · 4 grades on that route](/materials/uns/n06625 "UNS N06625") ## About Others These are miscellaneous metallic alloys that do not fit a more specific material family and may be based on iron, nickel, cobalt, copper or other alloy systems. They are selected for applications requiring particular combinations of strength, hardness, toughness, wear resistance or resistance to demanding service conditions. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 9 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 · 2 - **SG-NiCr21Mo9Nb This grade’s own name** - [UP-NiCr21Mo9Nb This grade’s own name](/materials/din-en/up-nicr21mo9nb "DIN / EN UP-NiCr21Mo9Nb") UNS United States · 2 - [N06625 This grade’s own name](/materials/uns/n06625 "UNS N06625") - [N06626 Indicative](/materials/uns/n06626 "UNS N06626") ASTM United States · 3 - [B 443 Gr 1 Indicative](/materials/astm/b-443-gr-1 "ASTM B 443 Gr 1") - [B 446 Indicative](/materials/astm/b-446 "ASTM B 446") - [F3056 Indicative](/materials/astm/f3056 "ASTM F3056") SAE AMS United States / Aerospace · 2 - [5599 Indicative coil plate sheet](/materials/ams/5599 "SAE AMS 5599") - [5666 Indicative bar](/materials/ams/5666 "SAE AMS 5666") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 12 elements on file · weight % What this alloy is Fe Ni Cr Mo Iron — the balance, never listed by a standard — 3.3 % Ni — 60 % Cr — 21.5 % Mo — 9 % Traces & impurities · 6.2 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.1 | | Si | ≤ 0.5 | | Mn | ≤ 0.5 | | S | 0.015 | | Cr | 20–23 | | Mo | 8–10 — Unusual | | Ni | ≥ 60 — Unusual | | Cu | ≤ 0.5 | | Al | ≤ 0.4 | | Ti | ≤ 0.4 | | Nb | 3–4.5 — Unusual | | Fe | ≤ 5 | Carbon Silicon Manganese Sulfur Chromium Molybdenum Nickel Copper Aluminium Titanium Niobium 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 | ≤0,10 | — | 0.100 | Max | | Al | ≤0,40 | — | 0.400 | Max | | Si | ≤0,50 | — | 0.500 | Max | | S | 0,015 | 0.015 | 0.015 | Exact | | Ti | ≤0,40 | — | 0.400 | Max | | Cr | 20,0-23,0 | 20.000 | 23.000 | Range | | Mn | ≤0,50 | — | 0.500 | Max | | Fe | ≤5,00 | — | 5.000 | Max | | Ni | ≥60,0 | 60.000 | — | Min | | Cu | ≤0,50 | — | 0.500 | Max | | Nb | 3,00-4,50 | 3.000 | 4.500 | Range | | Mo | 8,00-10,0 | 8.000 | 10.000 | 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: Ni. ## Physical & mechanical properties Density 8,4 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. ## Similar grades — and why Selection rule, stated so you can disagree with it: same number class 2.4, a shared category, and a published range for Ni / Cr that overlaps this grade’s. These are neighbours in composition space — they are not equivalents, and none is claimed to be interchangeable with this grade. [EL-NiCr20Mo9Nb 2.4621 Ni ≥58,0 · Cr 20,0-23,0 - ΔNi 2.00 - ΔCr 0.00 - 1 designations](/materials/din-en/el-nicr20mo9nb "EL-NiCr20Mo9Nb")[SG-NiCr23Al 2.4626 Ni 58,0-63,0 · Cr 21,0-25,0 - ΔNi 0.50 - ΔCr 1.50 - 9 designations](/materials/din-en/sg-nicr23al "SG-NiCr23Al")[NiCr 20 Mo 15 2.4811 Ni ≥58,0 · Cr 19,0-21,0 - ΔNi 2.00 - ΔCr 1.50 - 1 designations](/materials/din-en/nicr20mo15 "NiCr 20 Mo 15")[NiCr21Mo16W 2.4606 Ni Rest/Bal. · Cr 19,0-23,0 - ΔNi 3.14 - ΔCr 0.50 - 6 designations](/materials/din-en/nicr21mo16w "NiCr21Mo16W")[G-NiCr 20 Mo 15 2.4697 Ni Rest/Bal. · Cr 19,0-21,0 - ΔNi 2.89 - ΔCr 1.50 - 1 designations](/materials/din-en/g-nicr-20-mo-15 "G-NiCr 20 Mo 15")[EL-NiCr19Nb 2.4648 Ni ≥63,0 · Cr 18,0-22,0 - ΔNi 3.00 - ΔCr 1.50 - 1 designations](/materials/din-en/el-nicr19nb "EL-NiCr19Nb") ## 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=e8d06280-7c44-4515-8f18-a18ff4a4d85d&designation=fb8657dd-bd22-426e-88e7-2ddd880db9d4 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/sg-nicr21mo9nb.pdf "Datasheet as PDF")