--- title: "100MnCrW4 — Tool steels for cold work" description: "100MnCrW4: 16 equivalent designations across 14 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/din-en/100mncrw4 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/100mncrw4.md cs: https://steelequivalents.com/cs/materiály/din-en/100mncrw4.md de: https://steelequivalents.com/de/werkstoffe/din-en/100mncrw4.md es: https://steelequivalents.com/es/materiales/din-en/100mncrw4.md fr: https://steelequivalents.com/fr/matériaux/din-en/100mncrw4.md hu: https://steelequivalents.com/hu/anyagok/din-en/100mncrw4.md it: https://steelequivalents.com/it/materiali/din-en/100mncrw4.md nl: https://steelequivalents.com/nl/materialen/din-en/100mncrw4.md pl: https://steelequivalents.com/pl/materiały/din-en/100mncrw4.md pt: https://steelequivalents.com/pt/materiais/din-en/100mncrw4.md ru: https://steelequivalents.com/ru/материалы/din-en/100mncrw4.md tr: https://steelequivalents.com/tr/malzemeler/din-en/100mncrw4.md zh: https://steelequivalents.com/zh/材料/din-en/100mncrw4.md ja: https://steelequivalents.com/ja/材料/din-en/100mncrw4.md ar: https://steelequivalents.com/ar/المواد/din-en/100mncrw4.md ko: https://steelequivalents.com/ko/재료/din-en/100mncrw4.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/100mncrw4.md hi: https://steelequivalents.com/hi/सामग्री/din-en/100mncrw4.md content_hash: sha256:0aa26924234262e77f8ee4978ac6fcbc1b303cecd03feea7b9886782a6009bdf 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/100mncrw4 > Canonical URL: https://steelequivalents.com/materials/din-en/100mncrw4 > 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 · 16 designations # 100MnCrW4 100MnCrW4 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 1.2510. We list 15 designations recorded for this grade, in the standards UNS, AISI / SAE, BS, AFNOR, UNE, ISO, JIS, GB, GOST, UNI, SS, ČSN and PN. Its recorded composition includes C 0.9–1.05%, Si 0.15–0.35%, Cr 0.5–0.7%, Mn 1–1.2% and W 0.5–0.7%. Its recorded density is 7.85 g/cm³. - [*Material no.* **1.2510**](/materials/material-no/1.2510 "Material no.: 1.2510") - [*Category* **Tool steels for cold work · 109 grades**](/categories/tool-steels-for-cold-work "Category: Tool steels for cold work · 109 grades") - *Designations* **16** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=4472c994-eb42-4bb8-b830-cd665c9df342&designation=b962ef13-ba1a-4be0-855c-0a48320986a8 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/100mncrw4.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [UNS T31501 This grade’s own name](/materials/uns/t31501 "UNS T31501") - [AISI / SAE O1 This grade’s own name](/materials/aisi-sae/o1 "AISI / SAE O1") ## 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 16 designations · 14 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 - **100MnCrW4 This grade’s own name** UNS United States · 1 - [T31501 This grade’s own name](/materials/uns/t31501 "UNS T31501") AISI / SAE United States · 1 - [O1 This grade’s own name](/materials/aisi-sae/o1 "AISI / SAE O1") BS United Kingdom · 1 - [BO1 Indicative](/materials/bs/bo1 "BS BO1") AFNOR France · 3 - [100MCW5 Indicative](/materials/afnor/100mcw5 "AFNOR 100MCW5") - [90MnWCrV5 Indicative](/materials/afnor/90mnwcrv5 "AFNOR 90MnWCrV5") - [90MWCV5 Indicative](/materials/afnor/90mwcv5 "AFNOR 90MWCV5") UNE Spain · 1 - [F.5220 Indicative](/materials/une/f-5220 "UNE F.5220") ISO International · 1 - [95MnWCr5 Indicative](/materials/din-en/95mnwcr5 "ISO 95MnWCr5") JIS Japan · 1 - [SKS 3 Indicative](/materials/jis/sks3 "JIS SKS 3") GB China · 1 - [9CrWMn Indicative](/materials/gb/9crwmn "GB 9CrWMn") GOST Russia / CIS · 1 - [9KhVG Indicative](/materials/gost/9khvg "GOST 9KhVG") UNI Italy · 1 - [100MnCrW4KU Indicative](/materials/uni/100mncrw4ku "UNI 100MnCrW4KU") SS Sweden · 1 - [2140 Indicative](/materials/ss/2140 "SS 2140") ČSN Czechia · 1 - [19 314 Indicative](/materials/csn/19314 "ČSN 19 314") PN Poland · 1 - [NMWV Indicative](/materials/pn/nmwv "PN NMWV") 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 Mn C Cr Iron — the balance, never listed by a standard — 96.3 % Mn — 1.1 % C — 1 % Cr — 0.6 % Traces & impurities · 1 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.9–1.05 | | Si | 0.15–0.35 | | Mn | 1–1.2 | | P | 0.035 | | S | 0.035 | | Cr | 0.5–0.7 | | V | 0.05–0.15 | | W | 0.5–0.7 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Vanadium Tungsten 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 | 0,90-1,05 | 0.900 | 1.050 | Range | | Si | 0,15-0,35 | 0.150 | 0.350 | Range | | P | 0,035 | 0.035 | 0.035 | Exact | | S | 0,035 | 0.035 | 0.035 | Exact | | V | 0,05-0,15 | 0.050 | 0.150 | Range | | Cr | 0,50-0,70 | 0.500 | 0.700 | Range | | Mn | 1,00-1,20 | 1.000 | 1.200 | Range | | W | 0,50-0,70 | 0.500 | 0.700 | 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, 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. ## Heat treatment **GB /T 1299-2025** Single operation Test specimen - Quenching 800–830 °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/azhlNWIxMzUyMjE_ "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 Mn / 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. [62SiMnCr4 1.2101 Mn 0,90-1,20 · Cr 0,40-0,70 - ΔMn 0.05 - ΔCr 0.05 - 7 designations](/materials/din-en/62simncr4 "62SiMnCr4")[65MnCr4 1.2125 Mn 1,00-1,20 · Cr 0,60-0,80 - ΔMn 0.00 - ΔCr 0.10 - 1 designations](/materials/din-en/65mncr4 "65MnCr4")[95MnWCr5 1.2825 Mn 1,05-1,35 · Cr 0,40-0,65 - ΔMn 0.10 - ΔCr 0.07 - 16 designations](/materials/din-en/95mnwcr5 "95MnWCr5")[105MnCr4 1.2127 Mn 1,00-1,20 · Cr 0,70-1,00 - ΔMn 0.00 - ΔCr 0.25 - 2 designations](/materials/din-en/105mncr4 "105MnCr4") ## 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=4472c994-eb42-4bb8-b830-cd665c9df342&designation=b962ef13-ba1a-4be0-855c-0a48320986a8 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/100mncrw4.pdf "Datasheet as PDF")