--- title: "ISO steel grades — 531 designations — Page 2" description: "Steel grades designated under ISO, with chemical composition, mechanical properties and equivalents in other standards. 531 designations across 327…" canonical: https://steelequivalents.com/materials/iso/page/2 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/iso/page/2.md cs: https://steelequivalents.com/cs/materiály/iso.md de: https://steelequivalents.com/de/werkstoffe/iso.md es: https://steelequivalents.com/es/materiales/iso.md fr: https://steelequivalents.com/fr/matériaux/iso.md hu: https://steelequivalents.com/hu/anyagok/iso.md it: https://steelequivalents.com/it/materiali/iso.md nl: https://steelequivalents.com/nl/materialen/iso.md pl: https://steelequivalents.com/pl/materiały/iso.md pt: https://steelequivalents.com/pt/materiais/iso.md ru: https://steelequivalents.com/ru/материалы/iso.md tr: https://steelequivalents.com/tr/malzemeler/iso.md zh: https://steelequivalents.com/zh/材料/iso.md ja: https://steelequivalents.com/ja/材料/iso.md ar: https://steelequivalents.com/ar/المواد/iso.md ko: https://steelequivalents.com/ko/재료/iso.md pt-br: https://steelequivalents.com/pt-br/materiais/iso.md hi: https://steelequivalents.com/hi/सामग्री/iso.md content_hash: sha256:622cf14b092576d5f10979c496d1a29d0b4977c36f346e02b0cd86c060eca7b9 generated: 2026-09-22 --- > **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/iso/page/2 > Canonical URL: https://steelequivalents.com/materials/iso/page/2 > 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. ISO · 531 grades # ISO steel grades — 531 designations — Page 2 Every grade designated under ISO, with the material number it maps to, what kind of steel it is, its carbon window and how many other standards carry it. Open a grade for its full composition, properties and its designations in other standards. Every name on this page is an indicative cross-reference, not an asserted identity: the grades are close, not interchangeable. Check the composition before you substitute. ## Also known as 531 designations | Grade | Material no. | Category | C% by weight | Also in other standards | |---|---|---|---|---| | [20MnCr5](/materials/din-en/20mncr5 "20MnCr5") | [1.7149](/materials/material-no/1.7149 "1.7149") | Case hardening steels | 0.17–0.22 | 8 | | [20MnCr5](/materials/din-en/20mncr5 "20MnCr5") | [1.2162](/materials/material-no/1.2162 "1.2162") | Tool steels for cold work | 0.18–0.24 | 7 | | [20MnCr5](/materials/din-en/20mncr5 "20MnCr5") | [1.7147](/materials/material-no/1.7147 "1.7147") | Case hardening steels | 0.17–0.22 | 15 | | [20MnCr5](/materials/din-en/20mncr5 "20MnCr5") | [1.7131](/materials/material-no/1.7131 "1.7131") | Case hardening steels | 0.14–0.19 | 24 | | [20MnCrS5](/materials/din-en/20mncrs5 "20MnCrS5") | [1.7131](/materials/material-no/1.7131 "1.7131") | Case hardening steels | 0.14–0.19 | 24 | | [20MnCrS5](/materials/din-en/20mncrs5 "20MnCrS5") | [1.7139](/materials/material-no/1.7139 "1.7139") | Case hardening steels | 0.14–0.19 | 11 | | [20MnCrS5](/materials/din-en/20mncrs5 "20MnCrS5") | [1.7147](/materials/material-no/1.7147 "1.7147") | Case hardening steels | 0.17–0.22 | 15 | | [20MnCrS5](/materials/din-en/20mncrs5 "20MnCrS5") | [1.2162](/materials/material-no/1.2162 "1.2162") | Tool steels for cold work | 0.18–0.24 | 7 | | [20MnCrS5](/materials/din-en/20mncrs5 "20MnCrS5") | [1.7149](/materials/material-no/1.7149 "1.7149") | Case hardening steels | 0.17–0.22 | 8 | | [20NiCrMo2](/materials/din-en/20nicrmo2 "20NiCrMo2") | [1.6526](/materials/material-no/1.6526 "1.6526") | Case hardening steels | 0.17–0.23 | 9 | | [20NiCrMo2](/materials/din-en/20nicrmo2 "20NiCrMo2") | [1.6523](/materials/material-no/1.6523 "1.6523") | Case hardening steels | 0.17–0.23 | 18 | | [20NiCrMo2](/materials/din-en/20nicrmo2 "20NiCrMo2") | [1.6522](/materials/material-no/1.6522 "1.6522") | Case hardening steels | 0.17–0.23 | 6 | | [20NiCrMo2F](/materials/iso/20nicrmo2f "20NiCrMo2F") | [1.6522](/materials/material-no/1.6522 "1.6522") | Case hardening steels | 0.17–0.23 | 6 | | [20NiCrMo2F](/materials/iso/20nicrmo2f "20NiCrMo2F") | [1.6526](/materials/material-no/1.6526 "1.6526") | Case hardening steels | 0.17–0.23 | 9 | | [20NiCrMoS2](/materials/iso/20nicrmos2 "20NiCrMoS2") | [1.6523](/materials/material-no/1.6523 "1.6523") | Case hardening steels | 0.17–0.23 | 18 | | [20NiCrMoS2](/materials/iso/20nicrmos2 "20NiCrMoS2") | [1.6526](/materials/material-no/1.6526 "1.6526") | Case hardening steels | 0.17–0.23 | 9 | | [210Cr12](/materials/iso/210cr12 "210Cr12") | [1.2080](/materials/material-no/1.2080 "1.2080") | Tool steels for cold work | 1.9–2.2 | 18 | | [21MnCr5](/materials/din-en/21mncr5 "21MnCr5") | [1.7131](/materials/material-no/1.7131 "1.7131") | Case hardening steels | 0.14–0.19 | 24 | | [21MnCr5](/materials/din-en/21mncr5 "21MnCr5") | [1.7139](/materials/material-no/1.7139 "1.7139") | Case hardening steels | 0.14–0.19 | 11 | | [21MnCr5](/materials/din-en/21mncr5 "21MnCr5") | [1.7147](/materials/material-no/1.7147 "1.7147") | Case hardening steels | 0.17–0.22 | 15 | | [21MnCr5](/materials/din-en/21mncr5 "21MnCr5") | [1.7149](/materials/material-no/1.7149 "1.7149") | Case hardening steels | 0.17–0.22 | 8 | | [21MnCr5](/materials/din-en/21mncr5 "21MnCr5") | [1.2162](/materials/material-no/1.2162 "1.2162") | Tool steels for cold work | 0.18–0.24 | 7 | | [22Mn6](/materials/din-en/22mn6 "22Mn6") | [1.1133](/materials/material-no/1.1133 "1.1133") | Quenched and tempered steels | 0.17–0.23 | 20 | | [22Mn6H](/materials/iso/22mn6h "22Mn6H") | [1.1133](/materials/material-no/1.1133 "1.1133") | Quenched and tempered steels | 0.17–0.23 | 20 | | [250](/materials/bs/250 "250") | [EN-JL1040](/materials/material-no/en-jl1040 "EN-JL1040") | Others | — | 22 | | [25CrMo4](/materials/din-en/25crmo4 "25CrMo4") | [1.7218](/materials/material-no/1.7218 "1.7218") | Quenched and tempered steels | 0.22–0.29 | 25 | | [25CrMo4](/materials/din-en/25crmo4 "25CrMo4") | — | — | 0.23–0.28 | 3 | | [25CrMoS4](/materials/din-en/25crmos4 "25CrMoS4") | [1.7213](/materials/material-no/1.7213 "1.7213") | Others | 0.22–0.29 | 5 | | [28Mn6](/materials/din-en/28mn6 "28Mn6") | [1.1170](/materials/material-no/1.1170 "1.1170") | Quenched and tempered steels | 0.25–0.32 | 16 | | [300](/materials/bs/300 "300") | [EN-JL1050](/materials/material-no/en-jl1050 "EN-JL1050") | Others | — | 22 | | [30WCrV5](/materials/iso/30wcrv5 "30WCrV5") | [1.2567](/materials/material-no/1.2567 "1.2567") | Tool steels for hot work | 0.25–0.35 | 9 | | [31CrNiMo8](/materials/din-en/31crnimo8 "31CrNiMo8") | [1.6580](/materials/material-no/1.6580 "1.6580") | Quenched and tempered steels | 0.26–0.34 | 15 | | [32CrMoV12-28](/materials/din-en/32crmov12-28 "32CrMoV12-28") | [1.2365](/materials/material-no/1.2365 "1.2365") | Tool steels for hot work | 0.28–0.35 | 18 | | [34Cr4](/materials/din-en/34cr4 "34Cr4") | [1.7034](/materials/material-no/1.7034 "1.7034") | Quenched and tempered steels | 0.34–0.41 | 23 | | [34Cr4](/materials/din-en/34cr4 "34Cr4") | [1.7033](/materials/material-no/1.7033 "1.7033") | Quenched and tempered steels | 0.3–0.37 | 18 | | [34Cr4](/materials/din-en/34cr4 "34Cr4") | — | — | 0.33–0.38 | 4 | | [34CrMo4](/materials/din-en/34crmo4 "34CrMo4") | [1.7220](/materials/material-no/1.7220 "1.7220") | Quenched and tempered steels | 0.3–0.37 | 24 | | [34CrMo4E](/materials/iso/34crmo4e "34CrMo4E") | [1.7220](/materials/material-no/1.7220 "1.7220") | Quenched and tempered steels | 0.3–0.37 | 24 | | [34CrMoS4](/materials/din-en/34crmos4 "34CrMoS4") | [1.7220](/materials/material-no/1.7220 "1.7220") | Quenched and tempered steels | 0.3–0.37 | 24 | | [34CrMoS4](/materials/din-en/34crmos4 "34CrMoS4") | [1.7226](/materials/material-no/1.7226 "1.7226") | Others | 0.3–0.37 | 9 | | [34CrS4](/materials/din-en/34crs4 "34CrS4") | [1.7033](/materials/material-no/1.7033 "1.7033") | Quenched and tempered steels | 0.3–0.37 | 18 | | [34CrS4](/materials/din-en/34crs4 "34CrS4") | [1.7034](/materials/material-no/1.7034 "1.7034") | Quenched and tempered steels | 0.34–0.41 | 23 | | [34CrS4](/materials/din-en/34crs4 "34CrS4") | [1.7037](/materials/material-no/1.7037 "1.7037") | Quenched and tempered steels | 0.3–0.37 | 8 | | [350](/materials/bs/350 "350") | [EN-JL1060](/materials/material-no/en-jl1060 "EN-JL1060") | Others | — | 21 | | [3505](/materials/iso/3505 "3505") | [1.3505](/materials/material-no/1.3505 "1.3505") | Bearing steels | 0.93–1.05 | 22 | | [3505](/materials/iso/3505 "3505") | [1.2067](/materials/material-no/1.2067 "1.2067") | Tool steels for cold work | 0.95–1.1 | 21 | | [3520](/materials/iso/3520 "3520") | [1.3520](/materials/material-no/1.3520 "1.3520") | Bearing steels | 0.93–1.05 | 16 | | [3567](/materials/iso/3567 "3567") | [1.7218](/materials/material-no/1.7218 "1.7218") | Quenched and tempered steels | 0.22–0.29 | 25 | | [3567](/materials/iso/3567 "3567") | [1.3567](/materials/material-no/1.3567 "1.3567") | Others | 0.17–0.23 | 7 | | [35CrMoV5](/materials/iso/35crmov5 "35CrMoV5") | [1.2343](/materials/material-no/1.2343 "1.2343") | Tool steels for hot work | 0.33–0.41 | 20 | **This grade’s own name** — recorded in our sources as this grade’s own designation under that standard. **Indicative** — taken from a published cross-reference table; a close match, not a guarantee of interchangeability. Verify against the mill certificate before ordering. **Withdrawn** — designation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once. [Previous](/materials/iso "Previous") Page 2 of 11[Next](/materials/iso/page/3 "Next")