--- title: "21Cr12MoV — composition, equivalents and standards" description: "21Cr12MoV: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/gb/21cr12mov language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/gb/21cr12mov.md cs: https://steelequivalents.com/cs/materiály/gb/21cr12mov.md de: https://steelequivalents.com/de/werkstoffe/gb/21cr12mov.md es: https://steelequivalents.com/es/materiales/gb/21cr12mov.md fr: https://steelequivalents.com/fr/matériaux/gb/21cr12mov.md hu: https://steelequivalents.com/hu/anyagok/gb/21cr12mov.md it: https://steelequivalents.com/it/materiali/gb/21cr12mov.md nl: https://steelequivalents.com/nl/materialen/gb/21cr12mov.md pl: https://steelequivalents.com/pl/materiały/gb/21cr12mov.md pt: https://steelequivalents.com/pt/materiais/gb/21cr12mov.md ru: https://steelequivalents.com/ru/материалы/gb/21cr12mov.md tr: https://steelequivalents.com/tr/malzemeler/gb/21cr12mov.md zh: https://steelequivalents.com/zh/材料/gb/21cr12mov.md ja: https://steelequivalents.com/ja/材料/gb/21cr12mov.md ar: https://steelequivalents.com/ar/المواد/gb/21cr12mov.md ko: https://steelequivalents.com/ko/재료/gb/21cr12mov.md pt-br: https://steelequivalents.com/pt-br/materiais/gb/21cr12mov.md hi: https://steelequivalents.com/hi/सामग्री/gb/21cr12mov.md content_hash: sha256:f0a525787989ed10a6c11e00708ddfeb73f913d1b9079ffdab4645c395b04beb 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/21cr12mov > Canonical URL: https://steelequivalents.com/materials/gb/21cr12mov > 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 · 1 designation # 21Cr12MoV 21Cr12MoV is a grade designated under GB. Its recorded composition includes C 0.18–0.24%, Cr 11–12.5%, Mn 0.3–0.8%, Ni 0.3–0.6% and Mo 0.8–1.2%. No cross-standard equivalents are recorded for this grade yet. Recorded mechanical properties include HB 255. - *Designations* **1** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=338cad0c-4acf-44d9-90f5-03118d03ca39&designation=b5981555-8353-48aa-a789-89feb4c8f5c9 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gb/21cr12mov.pdf "Datasheet as PDF") ## Chemical composition 10 elements on file · weight % What this alloy is Fe Cr Mo Mn Iron — the balance, never listed by a standard — 85.1 % Cr — 11.8 % Mo — 1 % Mn — 0.6 % Traces & impurities · 1.6 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.18–0.24 | | Si | 0.1–0.5 | | Mn | 0.3–0.8 | | P | ≤ 0.03 | | S | ≤ 0.025 | | Cr | 11–12.5 | | Mo | 0.8–1.2 | | Ni | 0.3–0.6 | | V | 0.25–0.35 | | Cu | ≤ 0.3 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel Vanadium 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 | 0.18-0.24 | 0.180 | 0.240 | Range | | Si | 0.1-0.5 | 0.100 | 0.500 | Range | | P | ≤0.03 | — | 0.030 | Max | | S | ≤0.025 | — | 0.025 | Max | | V | 0.25-0.35 | 0.250 | 0.350 | Range | | Cr | 11-12.5 | 11.000 | 12.500 | Range | | Mn | 0.3-0.8 | 0.300 | 0.800 | Range | | Ni | 0.3-0.6 | 0.300 | 0.600 | Range | | Cu | ≤0.3 | — | 0.300 | Max | | Mo | 0.8-1.2 | 0.800 | 1.200 | 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 This grade's composition falls outside the published model's validated range (a low-alloy composition window), so no transformation temperature is predicted here. ## 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 8732-2014** Order not stated by the source Steel product - Annealing 880–930 °C Cooling Slow cooling - Tempering 750–770 °C Cooling Fast cooling The source lists these operations without stating an order or an alternation. They are shown unordered on purpose. In this order d=25 1. Quenching 1020–1050 °C 1020–1070 °C Cooling Oil 2. Tempering 700–750 °C 650 °C Cooling Air Source: [www.caishuku.com](https://www.caishuku.com/detail/azhlNWIxNTAzOQ__ "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=338cad0c-4acf-44d9-90f5-03118d03ca39&designation=b5981555-8353-48aa-a789-89feb4c8f5c9 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gb/21cr12mov.pdf "Datasheet as PDF")