--- title: "40CrMnNiMo8-6-4 — Tool steels for cold work" description: "40CrMnNiMo8-6-4 in DIN / EN: material number 1.2738, also listed as 40CrMnNiMo8-6-1. It is a material in the category Tool steels for cold work." canonical: https://steelequivalents.com/materials/din-en/40crmnnimo8-6-4 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/40crmnnimo8-6-4.md cs: https://steelequivalents.com/cs/materiály/din-en/40crmnnimo8-6-4.md de: https://steelequivalents.com/de/werkstoffe/din-en/40crmnnimo8-6-4.md es: https://steelequivalents.com/es/materiales/din-en/40crmnnimo8-6-4.md fr: https://steelequivalents.com/fr/matériaux/din-en/40crmnnimo8-6-4.md hu: https://steelequivalents.com/hu/anyagok/din-en/40crmnnimo8-6-4.md it: https://steelequivalents.com/it/materiali/din-en/40crmnnimo8-6-4.md nl: https://steelequivalents.com/nl/materialen/din-en/40crmnnimo8-6-4.md pl: https://steelequivalents.com/pl/materiały/din-en/40crmnnimo8-6-4.md pt: https://steelequivalents.com/pt/materiais/din-en/40crmnnimo8-6-4.md ru: https://steelequivalents.com/ru/материалы/din-en/40crmnnimo8-6-4.md tr: https://steelequivalents.com/tr/malzemeler/din-en/40crmnnimo8-6-4.md zh: https://steelequivalents.com/zh/材料/din-en/40crmnnimo8-6-4.md ja: https://steelequivalents.com/ja/材料/din-en/40crmnnimo8-6-4.md ar: https://steelequivalents.com/ar/المواد/din-en/40crmnnimo8-6-4.md ko: https://steelequivalents.com/ko/재료/din-en/40crmnnimo8-6-4.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/40crmnnimo8-6-4.md hi: https://steelequivalents.com/hi/सामग्री/din-en/40crmnnimo8-6-4.md content_hash: sha256:ea9a5e98d9c1db19239a6adfe2a5c54fa7444c4ff0fc2b1d7c9a10a02f45ab0a generated: 2026-09-21 --- > **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/40crmnnimo8-6-4 > Canonical URL: https://steelequivalents.com/materials/din-en/40crmnnimo8-6-4 > 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 # 40CrMnNiMo8-6-4 40CrMnNiMo8-6-4 is a designation in DIN / EN for the material held under material number 1.2738, also listed as 40CrMnNiMo8-6-1. It is a material in the category Tool steels for cold work. We list 4 designations recorded for this grade, in the standards DIN / EN. - [*Material no.* **1.2738**](/materials/material-no/1.2738 "Material no.: 1.2738") - [*Category* **Tool steels for cold work · 109 grades**](/categories/tool-steels-for-cold-work "Category: Tool steels for cold work · 109 grades") - *Designations* **4** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=c677b886-6134-41c4-afd4-a5aaa2b4beae&designation=4c71091a-333f-4930-b837-544d986a3cf6 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/40crmnnimo8-6-4.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 4 designations · 1 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 · 4 - [1.2312 Indicative](/materials/material-no/1.2312 "DIN / EN 1.2312") - [40CrMnMoS8-6 Indicative](/materials/din-en/40crmnmos8-6 "DIN / EN 40CrMnMoS8-6") - [40CrMnNiMo8-6-1 This grade’s own name Withdrawn](/materials/din-en/40crmnnimo8-6-1 "DIN / EN 40CrMnNiMo8-6-1") - **40CrMnNiMo8-6-4 This grade’s own name** 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 Mn Ni Iron — the balance, never listed by a standard — 94.6 % Cr — 2 % Mn — 1.5 % Ni — 1.1 % Traces & impurities · 1 % 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 | 0.03 | | S | 0.03 | | Cr | 1.8–2.1 | | Mo | 0.15–0.25 | | Ni | 0.9–1.2 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel 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 | 0,03 | 0.030 | 0.030 | Exact | | S | 0,03 | 0.030 | 0.030 | Exact | | Cr | 1,80-2,10 | 1.800 | 2.100 | Range | | Mn | 1,30-1,60 | 1.300 | 1.600 | Range | | Ni | 0,90-1,20 | 0.900 | 1.200 | 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 computed from composition · °C Predicted Ae3 744 °C Predicted Ae1 741 °C Predicted Acm 672 °C Predicted Bs 455 °C These four temperatures are a CALCULATION from this grade's own composition, using the published Li, Niebuhr, Meekisho & Atteridge (1998) model — never a measurement, and computed from the UPPER BOUND of each element's specified range, not a mid-range figure. Where this grade also has a measured transformation point (Ac1, Ac3, Ar1, Ar3) on file, it is shown separately, in Physical & mechanical properties, and is never replaced by the predicted figures here — Ae (predicted, equilibrium) and Ac/Ar (measured, on heating or cooling) are different physical quantities and can differ by tens of degrees; a mismatch between the two is not an error in either. ## Physical & mechanical properties Density 7,8 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 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. [40CrMnMo7 1.2311 Cr 1,80-2,10 · Mn 1,30-1,60 - ΔCr 0.00 - ΔMn 0.00 - 13 designations](/materials/din-en/40crmnmo7 "40CrMnMo7")[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=c677b886-6134-41c4-afd4-a5aaa2b4beae&designation=4c71091a-333f-4930-b837-544d986a3cf6 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/40crmnnimo8-6-4.pdf "Datasheet as PDF")