--- title: "40CrMnMo7 — Tool steels for cold work" description: "40CrMnMo7: 13 equivalent designations across 13 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/din-en/40crmnmo7 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/40crmnmo7.md cs: https://steelequivalents.com/cs/materiály/din-en/40crmnmo7.md de: https://steelequivalents.com/de/werkstoffe/din-en/40crmnmo7.md es: https://steelequivalents.com/es/materiales/din-en/40crmnmo7.md fr: https://steelequivalents.com/fr/matériaux/din-en/40crmnmo7.md hu: https://steelequivalents.com/hu/anyagok/din-en/40crmnmo7.md it: https://steelequivalents.com/it/materiali/din-en/40crmnmo7.md nl: https://steelequivalents.com/nl/materialen/din-en/40crmnmo7.md pl: https://steelequivalents.com/pl/materiały/din-en/40crmnmo7.md pt: https://steelequivalents.com/pt/materiais/din-en/40crmnmo7.md ru: https://steelequivalents.com/ru/материалы/din-en/40crmnmo7.md tr: https://steelequivalents.com/tr/malzemeler/din-en/40crmnmo7.md zh: https://steelequivalents.com/zh/材料/din-en/40crmnmo7.md ja: https://steelequivalents.com/ja/材料/din-en/40crmnmo7.md ar: https://steelequivalents.com/ar/المواد/din-en/40crmnmo7.md ko: https://steelequivalents.com/ko/재료/din-en/40crmnmo7.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/40crmnmo7.md hi: https://steelequivalents.com/hi/सामग्री/din-en/40crmnmo7.md content_hash: sha256:d1e7d0327ca21c951edef7a12d026cdda3067213fd740a4179dbea9ae0c374e9 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/40crmnmo7 > Canonical URL: https://steelequivalents.com/materials/din-en/40crmnmo7 > 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 · 13 designations # 40CrMnMo7 40CrMnMo7 is a material in the category [Tool steels for cold work](/categories/tool-steels-for-cold-work "Tool steels for cold work"), held under material number 1.2311. We list 12 designations recorded for this grade, in the standards UNS, AISI / SAE, BS, AFNOR, UNE, JIS, GB, GOST, UNI, SS, ČSN and STN. Its recorded composition includes C 0.35–0.45%, Si 0.2–0.4%, Cr 1.8–2.1%, Mn 1.3–1.6% and Mo 0.15–0.25%. Its recorded density is 7.85 g/cm³. - [*Material no.* **1.2311**](/materials/material-no/1.2311 "Material no.: 1.2311") - [*Category* **Tool steels for cold work · 109 grades**](/categories/tool-steels-for-cold-work "Category: Tool steels for cold work · 109 grades") - *Designations* **13** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=d015c975-ae2b-40bc-a29b-b705f577edf0&designation=e5f28acc-2c94-4a1f-9db9-3a45b0b724f6 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/40crmnmo7.pdf "Datasheet as PDF") ## About Tool steels for cold work Cold-work tool steels are high-strength tool materials designed for shaping, cutting and forming operations carried out without significant heating of the workpiece. They are characterised by high hardness, wear resistance and the ability to retain a sharp or precise working edge, making them suitable for dies, punches, cutting tools and other tooling exposed to repeated mechanical contact. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 13 designations · 13 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 - **40CrMnMo7 This grade’s own name** UNS United States · 1 - [T51620 Indicative](/materials/uns/t51620 "UNS T51620") AISI / SAE United States · 1 - [P20 Indicative](/materials/aisi-sae/p20 "AISI / SAE P20") BS United Kingdom · 1 - [40CrMnMo8 Indicative](/materials/bs/40crmnmo8 "BS 40CrMnMo8") AFNOR France · 1 - [40CMD8 Indicative](/materials/afnor/40cmd8 "AFNOR 40CMD8") UNE Spain · 1 - [F.5318 Indicative](/materials/une/f-5318 "UNE F.5318") JIS Japan · 1 - [PDS3 / PX5 przybliż. Indicative](/materials/jis/pds3-px5-przybliz "JIS PDS3 / PX5 przybliż.") GB China · 1 - [3Cr2Mo Indicative](/materials/gb/3cr2mo "GB 3Cr2Mo") GOST Russia / CIS · 1 - [40KhGM Indicative](/materials/gost/40khgm "GOST 40KhGM") UNI Italy · 1 - **40CrMnMo7 Indicative** SS Sweden · 1 - [2311 Indicative](/materials/gost/2311 "SS 2311") ČSN Czechia · 1 - [19520 Indicative](/materials/csn/19520 "ČSN 19520") STN Slovakia · 1 - [19 520 Indicative](/materials/csn/19520 "STN 19 520") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 7 elements on file · weight % What this alloy is Fe Cr Mn C Iron — the balance, never listed by a standard — 95.6 % Cr — 2 % Mn — 1.5 % C — 0.4 % Traces & impurities · 0.6 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.35–0.45 | | Si | 0.2–0.4 | | Mn | 1.3–1.6 — Unusual | | P | 0.035 | | S | 0.035 | | Cr | 1.8–2.1 | | Mo | 0.15–0.25 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum 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 | 0,35-0,45 | 0.350 | 0.450 | Range | | Si | 0,20-0,40 | 0.200 | 0.400 | Range | | P | 0,035 | 0.035 | 0.035 | Exact | | S | 0,035 | 0.035 | 0.035 | Exact | | Cr | 1,80-2,10 | 1.800 | 2.100 | Range | | Mn | 1,30-1,60 | 1.300 | 1.600 | Range | | Mo | 0,15-0,25 | 0.150 | 0.250 | 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. ## Heat treatment **GB /T 1299-2025** Single operation Test specimen - Quenching 850–880 °C Cooling Oil Supply condition - Quenching Test specimen - Annealing Supply condition Conditions the standard permits on delivery. No temperature or medium is published for these, so no order and no alternation is implied. Source: [www.caishuku.com](https://www.caishuku.com/detail/azhlNWIxMzUyNTM_ "Source: www.caishuku.com") ## Similar grades — and why Selection rule, stated so you can disagree with it: same number class 1.2, a shared category, and a published range for Cr / Mn 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. [1.2312 1.2738 Cr 1,80-2,10 · Mn 1,30-1,60 - ΔCr 0.00 - ΔMn 0.00 - 4 designations](/materials/material-no/1.2312 "1.2312")[40CrMnMoS8-6 1.2312 Cr 1,80-2,00 · Mn 1,40-1,60 - ΔCr 0.05 - ΔMn 0.05 - 6 designations](/materials/din-en/40crmnmos8-6 "40CrMnMoS8-6") ## 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=d015c975-ae2b-40bc-a29b-b705f577edf0&designation=e5f28acc-2c94-4a1f-9db9-3a45b0b724f6 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/40crmnmo7.pdf "Datasheet as PDF")