--- title: "W2Mo8Cr4V — composition, equivalents and standards" description: "W2Mo8Cr4V is a designation in GB for the grade also listed as M1. We list 3 designations recorded for this grade, in the standards ASTM, ISO and GB." canonical: https://steelequivalents.com/materials/gb/w2mo8cr4v language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/gb/w2mo8cr4v.md cs: https://steelequivalents.com/cs/materiály/gb/w2mo8cr4v.md de: https://steelequivalents.com/de/werkstoffe/gb/w2mo8cr4v.md es: https://steelequivalents.com/es/materiales/gb/w2mo8cr4v.md fr: https://steelequivalents.com/fr/matériaux/gb/w2mo8cr4v.md hu: https://steelequivalents.com/hu/anyagok/gb/w2mo8cr4v.md it: https://steelequivalents.com/it/materiali/gb/w2mo8cr4v.md nl: https://steelequivalents.com/nl/materialen/gb/w2mo8cr4v.md pl: https://steelequivalents.com/pl/materiały/gb/w2mo8cr4v.md pt: https://steelequivalents.com/pt/materiais/gb/w2mo8cr4v.md ru: https://steelequivalents.com/ru/материалы/gb/w2mo8cr4v.md tr: https://steelequivalents.com/tr/malzemeler/gb/w2mo8cr4v.md zh: https://steelequivalents.com/zh/材料/gb/w2mo8cr4v.md ja: https://steelequivalents.com/ja/材料/gb/w2mo8cr4v.md ar: https://steelequivalents.com/ar/المواد/gb/w2mo8cr4v.md ko: https://steelequivalents.com/ko/재료/gb/w2mo8cr4v.md pt-br: https://steelequivalents.com/pt-br/materiais/gb/w2mo8cr4v.md hi: https://steelequivalents.com/hi/सामग्री/gb/w2mo8cr4v.md content_hash: sha256:7b1970f7bae9fcc437a634d303870f428c5d671da3d32166e182973b0d178710 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/gb/w2mo8cr4v > Canonical URL: https://steelequivalents.com/materials/gb/w2mo8cr4v > 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. GB · China · 3 designations # W2Mo8Cr4V W2Mo8Cr4V is a designation in GB for the grade also listed as M1. We list 3 designations recorded for this grade, in the standards ASTM, ISO and GB. - *Designations* **3** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=97de98f2-afd1-4f65-9da0-438e1b4ea1f3&designation=b446d9a2-41a3-4ae3-88b8-9634486a254d "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gb/w2mo8cr4v.pdf "Datasheet as PDF") ## Also known as 3 designations · 3 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. ASTM United States · 1 - [M1 Indicative](/materials/aisi-sae/m1 "ASTM M1") ISO International · 1 - [HS1-8-1 Indicative](/materials/din-en/hs1-8-1 "ISO HS1-8-1") GB China · 1 - **W2Mo8Cr4V 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 9 elements on file · weight % What this alloy is Fe Mo Cr W Iron — the balance, never listed by a standard — 82.8 % Mo — 8.5 % Cr — 4 % W — 1.7 % Traces & impurities · 3 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.77–0.87 | | Si | ≤ 0.7 | | Mn | 0.15–0.4 | | P | ≤ 0.03 | | S | ≤ 0.02 | | Cr | 3.5–4.5 | | Mo | 8–9 — Unusual | | V | 1–1.4 | | W | 1.4–2 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum 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 | 0.77-0.87 | 0.770 | 0.870 | Range | | Si | ≤0.7 | — | 0.700 | Max | | P | ≤0.03 | — | 0.030 | Max | | S | ≤0.02 | — | 0.020 | Max | | V | 1-1.4 | 1.000 | 1.400 | Range | | Cr | 3.5-4.5 | 3.500 | 4.500 | Range | | Mn | 0.15-0.4 | 0.150 | 0.400 | Range | | Mo | 8-9 | 8.000 | 9.000 | Range | | W | 1.4-2 | 1.400 | 2.000 | 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 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 0 conditions · 0 values 2 further values are held for this grade under a condition the source did not name — a bound with no quantity attached. They are withheld rather than shown against a guessed condition. ## Heat treatment **GB /T 9943-2025** In this order Test specimen 1. Preheating 800–900 °C 2. Quenching 1180–1200 °C Quenchant Oil, Salt bath or Nitrogen 3. Tempering 550 °C Supply condition - Annealing Supply condition - Quenching and Tempering 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/azhlNWIxMzY2MjA_ "Source: www.caishuku.com") ## 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=97de98f2-afd1-4f65-9da0-438e1b4ea1f3&designation=b446d9a2-41a3-4ae3-88b8-9634486a254d "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gb/w2mo8cr4v.pdf "Datasheet as PDF")