--- title: "A331 — 10 equivalent grades, compared" description: "The designation A331 is carried by 10 different grades. Compare them on the elements that actually differ, then open the one your print means." canonical: https://steelequivalents.com/materials/astm/a331 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/astm/a331.md cs: https://steelequivalents.com/cs/materiály/astm/a331.md de: https://steelequivalents.com/de/werkstoffe/astm/a331.md es: https://steelequivalents.com/es/materiales/astm/a331.md fr: https://steelequivalents.com/fr/matériaux/astm/a331.md hu: https://steelequivalents.com/hu/anyagok/astm/a331.md it: https://steelequivalents.com/it/materiali/astm/a331.md nl: https://steelequivalents.com/nl/materialen/astm/a331.md pl: https://steelequivalents.com/pl/materiały/astm/a331.md pt: https://steelequivalents.com/pt/materiais/astm/a331.md ru: https://steelequivalents.com/ru/материалы/astm/a331.md tr: https://steelequivalents.com/tr/malzemeler/astm/a331.md zh: https://steelequivalents.com/zh/材料/astm/a331.md ja: https://steelequivalents.com/ja/材料/astm/a331.md ar: https://steelequivalents.com/ar/المواد/astm/a331.md ko: https://steelequivalents.com/ko/재료/astm/a331.md pt-br: https://steelequivalents.com/pt-br/materiais/astm/a331.md hi: https://steelequivalents.com/hi/सामग्री/astm/a331.md content_hash: sha256:a23cffc82a6aafe7e1e4596498c89ae8167b7adf8eb9ce616be6afcd009f11ca 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/astm/a331 > Canonical URL: https://steelequivalents.com/materials/astm/a331 > 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. ASTM · United States · 10 grades # A331 The designation A331 is carried by 10 different grades. Compare them on the elements that actually differ, then open the one your print means. - *Matching grades* **10** - [*Category* **Tool steels for cold work · 109 grades**](/categories/tool-steels-for-cold-work "Category: Tool steels for cold work · 109 grades") - [*Category* **Quenched and tempered steels · 133 grades**](/categories/quenched-and-tempered-steels "Category: Quenched and tempered steels · 133 grades") - [*Category* **Special steels for aviation and aerospace · 39 grades**](/categories/special-steels-for-aviation-and-aerospace "Category: Special steels for aviation and aerospace · 39 grades") - [*Category* **Low-temperature structural steels · 55 grades**](/categories/low-temperature-structural-steels "Category: Low-temperature structural steels · 55 grades") [Search](/search "Steel grade search")[Inquiry](/inquiry "Inquiry") ## Which of the 10 do you want? This name is carried by several grades. The elements shown are the ones whose values actually differ across the set — the ones that decide the question. Values are the source text verbatim; an em dash means no value on file for that element on that grade, not zero. | Grade | Material no. | Category | Designations | Mn% | C% | Si% | Cr% | P% | S% | |---|---|---|---|---|---|---|---|---|---| | [50CrV4](/materials/din-en/50crv4 "50CrV4") | [1.2241](/materials/material-no/1.2241 "1.2241") 1.2 | [Tool steels for cold work](/categories/tool-steels-for-cold-work "Tool steels for cold work") | 12 | 0,80-1,10 | 0,47-0,55 | 0,15-0,35 | 0,90-1,20 | 0,03 | 0,03 | | [1.6546](/materials/material-no/1.6546 "1.6546") | [1.6546](/materials/material-no/1.6546 "1.6546") 1.6 | [Quenched and tempered steels](/categories/quenched-and-tempered-steels "Quenched and tempered steels") | 43 | 0,70-1,00 | 0,37-0,44 | 0,15-0,40 | 0,40-0,60 | 0,035 | 0,035 | | [40 NiCrMo 8 4](/materials/din-en/40nicrmo8-4 "40 NiCrMo 8 4") | [1.6562](/materials/material-no/1.6562 "1.6562") 1.6 | [Quenched and tempered steels](/categories/quenched-and-tempered-steels "Quenched and tempered steels") | 33 | 0,70-0,90 | 0,37-0,44 | 0,20-0,35 | 0,70-0,95 | 0,02 | 0,015 | | [25CrMo4](/materials/din-en/25crmo4 "25CrMo4") | [1.7214](/materials/material-no/1.7214 "1.7214") 1.7 | [Special steels for aviation and aerospace](/categories/special-steels-for-aviation-and-aerospace "Special steels for aviation and aerospace") | 29 | 0,50-0,80 | 0,22-0,29 | 0,15-0,35 | 0,90-1,20 | 0,02 | 0,015 | | [30CrMo4](/materials/din-en/30crmo4 "30CrMo4") | [1.7216](/materials/material-no/1.7216 "1.7216") 1.7 | [Low-temperature structural steels](/categories/low-temperature-structural-steels "Low-temperature structural steels") | 24 | 0,35-0,60 | 0,27-0,34 | ≤0,35 | 0,80-1,15 | 0,035 | 0,035 | | [1.7220](/materials/material-no/1.7220 "1.7220") | [1.7220](/materials/material-no/1.7220 "1.7220") 1.7 | [Quenched and tempered steels](/categories/quenched-and-tempered-steels "Quenched and tempered steels") | 159 | 0,60-0,90 | 0,30-0,37 | ≤0,40 | 0,90-1,20 | 0,035 | 0,035 | | [1.7225](/materials/material-no/1.7225 "1.7225") | [1.7225](/materials/material-no/1.7225 "1.7225") 1.7 | [Quenched and tempered steels](/categories/quenched-and-tempered-steels "Quenched and tempered steels") | 95 | 0,60-0,90 | 0,38-0,45 | ≤0,40 | 0,90-1,20 | 0,025 | 0,035 | | [30CrMoV9](/materials/din-en/30crmov9 "30CrMoV9") | [1.7707](/materials/material-no/1.7707 "1.7707") 1.7 | [Quenched and tempered steels](/categories/quenched-and-tempered-steels "Quenched and tempered steels") | 19 | 0,40-0,70 | 0,26-0,34 | ≤0,40 | 2,30-2,70 | 0,035 | 0,035 | | [G61500](/materials/uns/g61500 "G61500") | [1.8154](/materials/material-no/1.8154 "1.8154") 1.8 | [Special steels for aviation and aerospace](/categories/special-steels-for-aviation-and-aerospace "Special steels for aviation and aerospace") | 7 | 0,70-1,10 | 0,47-0,55 | 0,15-0,40 | 0,90-1,20 | 0,035 | 0,035 | | [1.8159](/materials/material-no/1.8159 "1.8159") | [1.8159](/materials/material-no/1.8159 "1.8159") 1.8 | [Quenched and tempered steels](/categories/quenched-and-tempered-steels "Quenched and tempered steels") | 73 | 0,70-1,10 | 0,47-0,55 | ≤0,40 | 0,90-1,20 | 0,025 | 0,025 | ## Not sure which one your print means? 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 "Inquiry")