--- title: "9Cr2Mo — composition, equivalents and standards" description: "9Cr2Mo: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/gb/9cr2mo language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/gb/9cr2mo.md cs: https://steelequivalents.com/cs/materiály/gb/9cr2mo.md de: https://steelequivalents.com/de/werkstoffe/gb/9cr2mo.md es: https://steelequivalents.com/es/materiales/gb/9cr2mo.md fr: https://steelequivalents.com/fr/matériaux/gb/9cr2mo.md hu: https://steelequivalents.com/hu/anyagok/gb/9cr2mo.md it: https://steelequivalents.com/it/materiali/gb/9cr2mo.md nl: https://steelequivalents.com/nl/materialen/gb/9cr2mo.md pl: https://steelequivalents.com/pl/materiały/gb/9cr2mo.md pt: https://steelequivalents.com/pt/materiais/gb/9cr2mo.md ru: https://steelequivalents.com/ru/материалы/gb/9cr2mo.md tr: https://steelequivalents.com/tr/malzemeler/gb/9cr2mo.md zh: https://steelequivalents.com/zh/材料/gb/9cr2mo.md ja: https://steelequivalents.com/ja/材料/gb/9cr2mo.md ar: https://steelequivalents.com/ar/المواد/gb/9cr2mo.md ko: https://steelequivalents.com/ko/재료/gb/9cr2mo.md pt-br: https://steelequivalents.com/pt-br/materiais/gb/9cr2mo.md hi: https://steelequivalents.com/hi/सामग्री/gb/9cr2mo.md content_hash: sha256:ad9a0f241900ccd66362cb5396c0f76ed467c51273d09af84ee7a6791c27cdce 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/9cr2mo > Canonical URL: https://steelequivalents.com/materials/gb/9cr2mo > 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 # 9Cr2Mo 9Cr2Mo is a grade designated under GB. Its recorded composition includes [C 0.85](/materials/material-no/1.1625 " — composition, equivalents and standards")–0.95%, Si 0.25–0.45%, Cr 1.7–2.1%, Mn 0.2–0.35% and Mo 0.2–0.4%. No cross-standard equivalents are recorded for this grade yet. Recorded mechanical properties include HB ≤ 229. - *Designations* **1** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=7df5d64c-183a-431c-aedf-04f56703ffe0&designation=c1c6f1bb-c1d2-42e8-9545-c1d24644b517 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gb/9cr2mo.pdf "Datasheet as PDF") ## Chemical composition 7 elements on file · weight % What this alloy is Fe Cr C Si Iron — the balance, never listed by a standard — 96.2 % Cr — 1.9 % C — 0.9 % Si — 0.4 % Traces & impurities · 0.6 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.85–0.95 | | Si | 0.25–0.45 | | Mn | 0.2–0.35 | | P | ≤ 0.03 | | S | ≤ 0.03 | | Cr | 1.7–2.1 | | Mo | 0.2–0.4 | 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 | 0.85-0.95 | 0.850 | 0.950 | Range | | Si | 0.25-0.45 | 0.250 | 0.450 | Range | | P | ≤0.03 | — | 0.030 | Max | | S | ≤0.03 | — | 0.030 | Max | | Cr | 1.7-2.1 | 1.700 | 2.100 | Range | | Mn | 0.2-0.35 | 0.200 | 0.350 | Range | | Mo | 0.2-0.4 | 0.200 | 0.400 | 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 1 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 1299-2025** Single operation Test specimen - Quenching 830–900 °C Cooling Air 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/azhlNWIxMzUxMjc_ "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=7df5d64c-183a-431c-aedf-04f56703ffe0&designation=c1c6f1bb-c1d2-42e8-9545-c1d24644b517 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gb/9cr2mo.pdf "Datasheet as PDF")