--- title: "20Cr2Ni4A — composition, equivalents and standards" description: "20Cr2Ni4A: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/gb/20cr2ni4a language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/gb/20cr2ni4a.md cs: https://steelequivalents.com/cs/materiály/gb/20cr2ni4a.md de: https://steelequivalents.com/de/werkstoffe/gb/20cr2ni4a.md es: https://steelequivalents.com/es/materiales/gb/20cr2ni4a.md fr: https://steelequivalents.com/fr/matériaux/gb/20cr2ni4a.md hu: https://steelequivalents.com/hu/anyagok/gb/20cr2ni4a.md it: https://steelequivalents.com/it/materiali/gb/20cr2ni4a.md nl: https://steelequivalents.com/nl/materialen/gb/20cr2ni4a.md pl: https://steelequivalents.com/pl/materiały/gb/20cr2ni4a.md pt: https://steelequivalents.com/pt/materiais/gb/20cr2ni4a.md ru: https://steelequivalents.com/ru/материалы/gb/20cr2ni4a.md tr: https://steelequivalents.com/tr/malzemeler/gb/20cr2ni4a.md zh: https://steelequivalents.com/zh/材料/gb/20cr2ni4a.md ja: https://steelequivalents.com/ja/材料/gb/20cr2ni4a.md ar: https://steelequivalents.com/ar/المواد/gb/20cr2ni4a.md ko: https://steelequivalents.com/ko/재료/gb/20cr2ni4a.md pt-br: https://steelequivalents.com/pt-br/materiais/gb/20cr2ni4a.md hi: https://steelequivalents.com/hi/सामग्री/gb/20cr2ni4a.md content_hash: sha256:fddbe151c665c6cb89a207b9e11f9164163d2ac509ce152335f9c103671d36b0 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/20cr2ni4a > Canonical URL: https://steelequivalents.com/materials/gb/20cr2ni4a > 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 # 20Cr2Ni4A 20Cr2Ni4A is a grade designated under GB. Its recorded composition includes C 0.17–0.23%, Si 0.17–0.37%, Cr 1.25–1.65%, Mn 0.3–0.6% and Ni 3.25–3.65%. No cross-standard equivalents are recorded for this grade yet. - *Designations* **1** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=58ac37db-7d19-4900-8670-6fdd6d3fdcb1&designation=c0a1c5ee-6013-4bb8-8442-63aca0b4f58c "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gb/20cr2ni4a.pdf "Datasheet as PDF") ## Chemical composition 9 elements on file · weight % What this alloy is Fe Ni Cr Mn Iron — the balance, never listed by a standard — 93.8 % Ni — 3.5 % Cr — 1.5 % Mn — 0.4 % Traces & impurities · 0.9 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.17–0.23 | | Si | 0.17–0.37 | | Mn | 0.3–0.6 | | P | ≤ 0.025 | | S | ≤ 0.025 | | Cr | 1.25–1.65 | | Mo | ≤ 0.1 | | Ni | 3.25–3.65 | | Cu | ≤ 0.25 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel 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 | 0.17-0.23 | 0.170 | 0.230 | Range | | Si | 0.17-0.37 | 0.170 | 0.370 | Range | | P | ≤0.025 | — | 0.025 | Max | | S | ≤0.025 | — | 0.025 | Max | | Cr | 1.25-1.65 | 1.250 | 1.650 | Range | | Mn | 0.3-0.6 | 0.300 | 0.600 | Range | | Ni | 3.25-3.65 | 3.250 | 3.650 | Range | | Cu | ≤0.25 | — | 0.250 | Max | | Mo | ≤0.1 | — | 0.100 | 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 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. ## 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=58ac37db-7d19-4900-8670-6fdd6d3fdcb1&designation=c0a1c5ee-6013-4bb8-8442-63aca0b4f58c "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gb/20cr2ni4a.pdf "Datasheet as PDF")