--- title: "11CrMo9-10 — Heat-resistant structural steels" description: "11CrMo9-10: 21 equivalent designations across 10 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/din-en/11crmo9-10 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/11crmo9-10.md cs: https://steelequivalents.com/cs/materiály/din-en/11crmo9-10.md de: https://steelequivalents.com/de/werkstoffe/din-en/11crmo9-10.md es: https://steelequivalents.com/es/materiales/din-en/11crmo9-10.md fr: https://steelequivalents.com/fr/matériaux/din-en/11crmo9-10.md hu: https://steelequivalents.com/hu/anyagok/din-en/11crmo9-10.md it: https://steelequivalents.com/it/materiali/din-en/11crmo9-10.md nl: https://steelequivalents.com/nl/materialen/din-en/11crmo9-10.md pl: https://steelequivalents.com/pl/materiały/din-en/11crmo9-10.md pt: https://steelequivalents.com/pt/materiais/din-en/11crmo9-10.md ru: https://steelequivalents.com/ru/материалы/din-en/11crmo9-10.md tr: https://steelequivalents.com/tr/malzemeler/din-en/11crmo9-10.md zh: https://steelequivalents.com/zh/材料/din-en/11crmo9-10.md ja: https://steelequivalents.com/ja/材料/din-en/11crmo9-10.md ar: https://steelequivalents.com/ar/المواد/din-en/11crmo9-10.md ko: https://steelequivalents.com/ko/재료/din-en/11crmo9-10.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/11crmo9-10.md hi: https://steelequivalents.com/hi/सामग्री/din-en/11crmo9-10.md content_hash: sha256:95b5c5168c876995cb82467bdb29751dffd2a5ba87ed2de72116c183cfba15c6 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/11crmo9-10 > Canonical URL: https://steelequivalents.com/materials/din-en/11crmo9-10 > 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 · 21 designations # 11CrMo9-10 11CrMo9-10 is a material in the category [Heat-resistant structural steels](/categories/heat-resistant-structural-steels "Heat-resistant structural steels"), held under material number 1.7383. We list 20 designations recorded for this grade, in the standards UNS, ASTM, AFNOR, UNE, GOST, UNI, ČSN, PN and STN. Its recorded composition includes C 0.08–0.15%, Si ≤ 0.5%, Cr 2–2.5%, Mn 0.4–0.8% and Mo 0.9–1.1%. Recorded mechanical properties include Rm 450–670 N/mm², ReH 265–310 N/mm² and A 17–23%; these figures vary with the delivery condition and dimension. Its recorded density is 7.85 g/cm³. - [*Material no.* **1.7383**](/materials/material-no/1.7383 "Material no.: 1.7383") - [*Category* **Heat-resistant structural steels · 62 grades**](/categories/heat-resistant-structural-steels "Category: Heat-resistant structural steels · 62 grades") - *Designations* **21** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=91a10aec-942d-4b40-a6a0-3f06330e118f&designation=49692184-cc1c-4bc1-9e02-e50ab2ac09b3 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/11crmo9-10.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [UNS K21590 This grade’s own name · 3 grades on that route](/materials/uns/k21590 "UNS K21590") ## About Heat-resistant structural steels Heat-resistant structural steels are structural steels designed to retain useful strength and dimensional stability at elevated temperatures. They are used for load-bearing components in hot-service equipment where mechanical performance must be maintained during heating. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 21 designations · 10 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 - **11CrMo9-10 This grade’s own name** UNS United States · 5 - [2.25Cr1Mo Indicative](/materials/astm/2-25cr1mo "UNS 2.25Cr1Mo") - [A182 F22 Indicative](/materials/astm/a182-f22 "UNS A182 F22") - [A182 T22 Indicative](/materials/astm/a182-t22 "UNS A182 T22") - [K21390 Indicative](/materials/uns/k21390 "UNS K21390") - [K21590 This grade’s own name](/materials/uns/k21590 "UNS K21590") ASTM United States · 4 - [2.25Cr1Mo Indicative](/materials/astm/2-25cr1mo "ASTM 2.25Cr1Mo") - [A182 F22 Indicative](/materials/astm/a182-f22 "ASTM A182 F22") - [A182 T22 Indicative](/materials/astm/a182-t22 "ASTM A182 T22") - [K21590 Indicative](/materials/uns/k21590 "ASTM K21590") AFNOR France · 2 - [10CD9-10 Indicative](/materials/afnor/10cd9-10 "AFNOR 10CD9-10") - [12CD9-10 Indicative](/materials/afnor/12cd9-10 "AFNOR 12CD9-10") UNE Spain · 1 - [12CrMo9-10 Indicative](/materials/din-en/12crmo9-10 "UNE 12CrMo9-10") GOST Russia / CIS · 4 - [10Ch2M Indicative](/materials/gost/10ch2m "GOST 10Ch2M") - [10Х2М Indicative](/materials/gost/10kh2m "GOST 10Х2М") - [1Ch2M Indicative](/materials/gost/1ch2m "GOST 1Ch2M") - [1Kh2M Indicative](/materials/gost/1kh2m "GOST 1Kh2M") UNI Italy · 1 - [12CrMo9-10 Indicative](/materials/din-en/12crmo9-10 "UNI 12CrMo9-10") ČSN Czechia · 1 - [15313 Indicative](/materials/csn/15313 "ČSN 15313") PN Poland · 1 - [10H2M Indicative](/materials/pn/10h2m "PN 10H2M") STN Slovakia · 1 - [15 313 Indicative](/materials/csn/15313 "STN 15 313") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 8 elements on file · weight % What this alloy is Fe Cr Mo Mn Iron — the balance, never listed by a standard — 95.2 % Cr — 2.3 % Mo — 1 % Mn — 0.6 % Traces & impurities · 0.9 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.08–0.15 | | Si | ≤ 0.5 | | Mn | 0.4–0.8 | | P | 0.02 | | S | 0.01 | | Cr | 2–2.5 — Unusual | | Mo | 0.9–1.1 | | Cu | ≤ 0.3 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Copper 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 | 0,08-0,15 | 0.080 | 0.150 | Range | | Si | ≤0,50 | — | 0.500 | Max | | P | 0,02 | 0.020 | 0.020 | Exact | | S | 0,01 | 0.010 | 0.010 | Exact | | Cr | 2,00-2,50 | 2.000 | 2.500 | Range | | Mn | 0,40-0,80 | 0.400 | 0.800 | Range | | Cu | ≤0,30 | — | 0.300 | Max | | Mo | 0,90-1,10 | 0.900 | 1.100 | 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 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. ## Properties by condition 2 conditions · 10 values By thickness**Normalized and tempered** source `steelnumber` | Thickness mm | ReH N/mm² | Rm N/mm² | A% | |---|---|---|---| | ≤ 200 | 310 | 520 – 670 | — | | 200 – 500 | 265 | 450 – 600 | — | | ≤ 200 | — | — | 20 | | 200 – 500 | — | — | 23 | | ≤ 200 | — | — | 20 | | 200 – 500 | — | — | 21 | By thickness**Liquid quenched and tempered** source `steelnumber` | Thickness mm | A% | |---|---| | ≤ 60 | 18 | | 60 – 100 | 17 | Every figure holds only for the condition on its own row. Values are never merged across conditions or across sources, never averaged, and never interpolated between two rows. An em dash means no value on file — never zero. Figures are converted to the unit in the column header; the source’s own wording is kept and shown where the two differ. ## Similar grades — and why Selection rule, stated so you can disagree with it: same number class 1.7, a shared category, and a published range for Cr / Mo 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. [12CrMo9-10 1.7375 Cr 2,00-2,50 · Mo 0,90-1,10 - ΔCr 0.00 - ΔMo 0.00 - 18 designations](/materials/din-en/12crmo9-10 "12CrMo9-10")[1.7380 1.7380 Cr 2,00-2,50 · Mo 0,90-1,10 - ΔCr 0.00 - ΔMo 0.00 - 82 designations](/materials/material-no/1.7380 "1.7380") ## 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=91a10aec-942d-4b40-a6a0-3f06330e118f&designation=49692184-cc1c-4bc1-9e02-e50ab2ac09b3 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/11crmo9-10.pdf "Datasheet as PDF")