--- title: "40Cr13 — composition, equivalents and standards" description: "40Cr13: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/gb/40cr13 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/gb/40cr13.md cs: https://steelequivalents.com/cs/materiály/gb/40cr13.md de: https://steelequivalents.com/de/werkstoffe/gb/40cr13.md es: https://steelequivalents.com/es/materiales/gb/40cr13.md fr: https://steelequivalents.com/fr/matériaux/gb/40cr13.md hu: https://steelequivalents.com/hu/anyagok/gb/40cr13.md it: https://steelequivalents.com/it/materiali/gb/40cr13.md nl: https://steelequivalents.com/nl/materialen/gb/40cr13.md pl: https://steelequivalents.com/pl/materiały/gb/40cr13.md pt: https://steelequivalents.com/pt/materiais/gb/40cr13.md ru: https://steelequivalents.com/ru/материалы/gb/40cr13.md tr: https://steelequivalents.com/tr/malzemeler/gb/40cr13.md zh: https://steelequivalents.com/zh/材料/gb/40cr13.md ja: https://steelequivalents.com/ja/材料/gb/40cr13.md ar: https://steelequivalents.com/ar/المواد/gb/40cr13.md ko: https://steelequivalents.com/ko/재료/gb/40cr13.md pt-br: https://steelequivalents.com/pt-br/materiais/gb/40cr13.md hi: https://steelequivalents.com/hi/सामग्री/gb/40cr13.md content_hash: sha256:fb221c8ed3dca1ba821bf7a8b98dad565690f3e83f10e087110ea58c29d33c83 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/40cr13 > Canonical URL: https://steelequivalents.com/materials/gb/40cr13 > 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 # 40Cr13 40Cr13 is a grade designated under GB. Its recorded composition includes C 0.36–0.45%, Si ≤ 0.6%, Cr 12–14%, Mn ≤ 0.8% and Ni ≤ 0.6%. No cross-standard equivalents are recorded for this grade yet. Recorded mechanical properties include HB 235. Further recorded physical values: E 180–215 GPa, λ 28.1–30 W/(m·K), α 10.5–12 ·10⁻⁶/K, cp 460 J/(kg·K) and ρ el. 550 nΩ·m; several of these are temperature-dependent. - *Designations* **1** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=0d0eb4da-a2d1-4ac7-8581-a299ba40d629&designation=8cfd5c47-f969-4884-9dd6-c7a0d939b894 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gb/40cr13.pdf "Datasheet as PDF") ## Chemical composition 7 elements on file · weight % What this alloy is Fe Cr Mn Si Iron — the balance, never listed by a standard — 84.5 % Cr — 13 % Mn — 0.8 % Si — 0.6 % Traces & impurities · 1.1 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.36–0.45 | | Si | ≤ 0.6 | | Mn | ≤ 0.8 | | P | ≤ 0.04 | | S | ≤ 0.03 | | Cr | 12–14 | | Ni | ≤ 0.6 | Carbon Silicon Manganese Phosphorus Sulfur Chromium 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 | 0.36-0.45 | 0.360 | 0.450 | Range | | Si | ≤0.6 | — | 0.600 | Max | | P | ≤0.04 | — | 0.040 | Max | | S | ≤0.03 | — | 0.030 | Max | | Cr | 12-14 | 12.000 | 14.000 | Range | | Mn | ≤0.8 | — | 0.800 | Max | | Ni | ≤0.6 | — | 0.600 | Max | 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: Mo. ## Physical & mechanical properties Elastic modulus 215 GPa Exact Thermal expansion coefficient 10.5 10^-6/K Exact Thermal conductivity 30 W/(m·K) Exact Specific heat capacity 0.46 J/(kg·K) Exact Electrical resistivity 0.55 nΩ·m 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. ## Properties by condition 1 conditions · 14 values At temperature**no delivery state stated** source `caishuku` | Temperature °C | Elastic modulus GPa | Thermal expansion coefficient 10^-6/K | Thermal conductivity W/(m·K) | Specific heat capacity J/(kg·K) | |---|---|---|---|---| | 20 | 215 | — | — | — | | 100 | 212 | 10.5 | 28.1 | — | | 200 | 205 | 11 | — | — | | 300 | 200 | 11 | — | — | | 400 | 190 | 11.5 | — | — | | 500 | 180 | 12 | 28.9 | 460 | 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. Every figure holds only for the condition on its own row. Values are never merged across conditions or across sources, never averaged, and never interpolated between two rows. An em dash means no value on file — never zero. Figures are converted to the unit in the column header; the source’s own wording is kept and shown where the two differ. ## Heat treatment **GJB 2294** Order not stated by the source - Quenching Temperature not stated - Solution annealing 1050–1100 °C Cooling Oil - Tempering Temperature not stated - Ageing 200–300 °C Cooling Air The source lists these operations without stating an order or an alternation. They are shown unordered on purpose. Supply condition - Annealing - Annealing Steel bar d≤75 - Quenching and Tempering Test specimen d≤75 - Annealing 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/azhlNWIxMjg1MTM_ "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=0d0eb4da-a2d1-4ac7-8581-a299ba40d629&designation=8cfd5c47-f969-4884-9dd6-c7a0d939b894 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gb/40cr13.pdf "Datasheet as PDF")