--- title: "40Cr10Si2Mo — composition, equivalents and standards" description: "40Cr10Si2Mo: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/gb/40cr10si2mo language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/gb/40cr10si2mo.md cs: https://steelequivalents.com/cs/materiály/gb/40cr10si2mo.md de: https://steelequivalents.com/de/werkstoffe/gb/40cr10si2mo.md es: https://steelequivalents.com/es/materiales/gb/40cr10si2mo.md fr: https://steelequivalents.com/fr/matériaux/gb/40cr10si2mo.md hu: https://steelequivalents.com/hu/anyagok/gb/40cr10si2mo.md it: https://steelequivalents.com/it/materiali/gb/40cr10si2mo.md nl: https://steelequivalents.com/nl/materialen/gb/40cr10si2mo.md pl: https://steelequivalents.com/pl/materiały/gb/40cr10si2mo.md pt: https://steelequivalents.com/pt/materiais/gb/40cr10si2mo.md ru: https://steelequivalents.com/ru/материалы/gb/40cr10si2mo.md tr: https://steelequivalents.com/tr/malzemeler/gb/40cr10si2mo.md zh: https://steelequivalents.com/zh/材料/gb/40cr10si2mo.md ja: https://steelequivalents.com/ja/材料/gb/40cr10si2mo.md ar: https://steelequivalents.com/ar/المواد/gb/40cr10si2mo.md ko: https://steelequivalents.com/ko/재료/gb/40cr10si2mo.md pt-br: https://steelequivalents.com/pt-br/materiais/gb/40cr10si2mo.md hi: https://steelequivalents.com/hi/सामग्री/gb/40cr10si2mo.md content_hash: sha256:d9a31fe4e2812e6f38b9d538fb4c16d3d080967f37862ecdcca1106bad3408da 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/40cr10si2mo > Canonical URL: https://steelequivalents.com/materials/gb/40cr10si2mo > 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 # 40Cr10Si2Mo 40Cr10Si2Mo is a grade designated under GB. Its recorded composition includes C 0.35–0.45%, Si 1.9–2.6%, Cr 9–10.5%, Mn ≤ 0.7% and Mo 0.7–0.9%. No cross-standard equivalents are recorded for this grade yet. Recorded mechanical properties include HB ≤ 269. - *Designations* **1** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=445de23c-d32c-452e-acd7-e85051780152&designation=a9a0682b-a26a-4e37-9fe5-100ed1acd88e "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gb/40cr10si2mo.pdf "Datasheet as PDF") ## Chemical composition 8 elements on file · weight % What this alloy is Fe Cr Si Mo Iron — the balance, never listed by a standard — 85.4 % Cr — 9.8 % Si — 2.3 % Mo — 0.8 % Traces & impurities · 1.8 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.35–0.45 | | Si | 1.9–2.6 — Unusual | | Mn | ≤ 0.7 | | P | ≤ 0.035 | | S | ≤ 0.03 | | Cr | 9–10.5 | | Mo | 0.7–0.9 | | Ni | ≤ 0.6 | 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 | 1.9-2.6 | 1.900 | 2.600 | Range | | P | ≤0.035 | — | 0.035 | Max | | S | ≤0.03 | — | 0.030 | Max | | Cr | 9-10.5 | 9.000 | 10.500 | Range | | Mn | ≤0.7 | — | 0.700 | Max | | Ni | ≤0.6 | — | 0.600 | Max | | Mo | 0.7-0.9 | 0.700 | 0.900 | 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 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 Supply condition - Annealing - Quenching and Tempering Test specimen 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/azhlNWIxMjk1ODI_ "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=445de23c-d32c-452e-acd7-e85051780152&designation=a9a0682b-a26a-4e37-9fe5-100ed1acd88e "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gb/40cr10si2mo.pdf "Datasheet as PDF")