--- title: "ISO steel grades — 531 designations — Page 4" 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/4 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/iso/page/4.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: sha256:67088c8f5b2357ca042d141d30e3cbd30372ea789b7c0e0b2d297e9331f87be0 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/4 > Canonical URL: https://steelequivalents.com/materials/iso/page/4 > 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 4 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 | |---|---|---|---|---| | [56NiCrMoV7](/materials/din-en/56nicrmov7 "56NiCrMoV7") | [1.2713](/materials/material-no/1.2713 "1.2713") | Tool steels for cold work | 0.5–0.6 | 12 | | [56NiCrMoV7](/materials/din-en/56nicrmov7 "56NiCrMoV7") | [1.2714](/materials/material-no/1.2714 "1.2714") | Tool steels for hot work | 0.5–0.6 | 15 | | [59Si7](/materials/iso/59si7 "59Si7") | [1.5027](/materials/material-no/1.5027 "1.5027") | Spring steels | 0.56–0.64 | 11 | | [59Si7](/materials/iso/59si7 "59Si7") | [1.5028](/materials/material-no/1.5028 "1.5028") | Spring steels | 0.6–0.7 | 11 | | [59Si7](/materials/iso/59si7 "59Si7") | [1.7108](/materials/material-no/1.7108 "1.7108") | Spring steels | 0.57–0.65 | 11 | | [600-3](/materials/bs/600-3 "600-3") | [EN-JS1060](/materials/material-no/en-js1060 "EN-JS1060") | Others | — | 20 | | [600-3](/materials/bs/600-3 "600-3") | [EN-JS1092](/materials/material-no/en-js1092 "EN-JS1092") | Others | — | 20 | | [600-3](/materials/bs/600-3 "600-3") | [EN-JS1093](/materials/material-no/en-js1093 "EN-JS1093") | Others | — | 20 | | [60CrB3](/materials/iso/60crb3 "60CrB3") | [1.7138](/materials/material-no/1.7138 "1.7138") | Spring steels | 0.48–0.55 | 4 | | [60CrB3](/materials/iso/60crb3 "60CrB3") | [1.7190](/materials/material-no/1.7190 "1.7190") | Spring steels | 0.58 | 7 | | [60CrMo3-3](/materials/din-en/60crmo3-3 "60CrMo3-3") | — | — | 0.56–0.64 | 3 | | [60CrMo32](/materials/din-en/60crmo3-2 "60CrMo32") | [1.7241](/materials/material-no/1.7241 "1.7241") | Others | 0.56–0.64 | 4 | | [60MnSiCr4](/materials/din-en/60mnsicr4 "60MnSiCr4") | [1.2101](/materials/material-no/1.2101 "1.2101") | Tool steels for cold work | 0.58–0.66 | 5 | | [60MnSiCr4](/materials/din-en/60mnsicr4 "60MnSiCr4") | [1.2826](/materials/material-no/1.2826 "1.2826") | Tool steels for cold work | 0.58–0.65 | 9 | | [60WCrV8](/materials/din-en/60wcrv8 "60WCrV8") | [1.2542](/materials/material-no/1.2542 "1.2542") | Tool steels for cold work | 0.4–0.5 | 12 | | [60WCrV8](/materials/din-en/60wcrv8 "60WCrV8") | [1.2550](/materials/material-no/1.2550 "1.2550") | Tool steels for cold work | 0.55–0.65 | 15 | | [700-2](/materials/bs/700-2 "700-2") | [EN-JS1102](/materials/material-no/en-js1102 "EN-JS1102") | Others | — | 21 | | [700-2](/materials/bs/700-2 "700-2") | [EN-JS1103](/materials/material-no/en-js1103 "EN-JS1103") | Others | — | 21 | | [800-2](/materials/bs/800-2 "800-2") | [EN-JS1080](/materials/material-no/en-js1080 "EN-JS1080") | Others | — | 16 | | [90MnCrV8](/materials/din-en/90mncrv8 "90MnCrV8") | [1.2842](/materials/material-no/1.2842 "1.2842") | Tool steels for cold work | 0.85–0.95 | 14 | | [90MnV2](/materials/iso/90mnv2 "90MnV2") | [1.2842](/materials/material-no/1.2842 "1.2842") | Tool steels for cold work | 0.85–0.95 | 14 | | [95MnWCr5](/materials/din-en/95mnwcr5 "95MnWCr5") | [1.2510](/materials/material-no/1.2510 "1.2510") | Tool steels for cold work | 0.9–1.05 | 13 | | [95MnWCr5](/materials/din-en/95mnwcr5 "95MnWCr5") | [1.2825](/materials/material-no/1.2825 "1.2825") | Tool steels for cold work | 0.9–1 | 13 | | [9NiMnMoNb5-4-4](/materials/iso/9nimnmonb5-4-4 "9NiMnMoNb5-4-4") | [1.6368](/materials/material-no/1.6368 "1.6368") | Heat-resistant structural steels | ≤ 0.17 | 4 | | [9S20](/materials/jis/9s20 "9S20") | — | — | ≤ 0.09 | 3 | | [A-1b](/materials/iso/a-1b "A-1b") | [1.4125](/materials/material-no/1.4125 "1.4125") | Stainless steels | 0.95–1.2 | 11 | | [BNI6025](/materials/iso/bni6025 "BNI6025") | [2.4633](/materials/material-no/2.4633 "2.4633") | Nickel and cobalt alloys | 0.15–0.25 | 3 | | [C-Ni99](/materials/iso/c-ni99 "C-Ni99") | [2.4066](/materials/material-no/2.4066 "2.4066") | Nickel and cobalt alloys | ≤ 0.1 | 10 | | [C-Ni99](/materials/iso/c-ni99 "C-Ni99") | [2.4068](/materials/material-no/2.4068 "2.4068") | Nickel and cobalt alloys | ≤ 0.02 | 8 | | [C-Ni99-HC](/materials/iso/c-ni99-hc "C-Ni99-HC") | [2.4066](/materials/material-no/2.4066 "2.4066") | Nickel and cobalt alloys | ≤ 0.1 | 10 | | [C-Ni99-HC](/materials/iso/c-ni99-hc "C-Ni99-HC") | [2.4068](/materials/material-no/2.4068 "2.4068") | Nickel and cobalt alloys | ≤ 0.02 | 8 | | [C-NiMo31](/materials/iso/c-nimo31 "C-NiMo31") | [2.4617](/materials/material-no/2.4617 "2.4617") | Nickel and cobalt alloys | ≤ 0.01 | 4 | | [C10](/materials/din-en/c10 "C10") | [1.1121](/materials/material-no/1.1121 "1.1121") | Case hardening steels | 0.07–0.13 | 22 | | [C10](/materials/din-en/c10 "C10") | [1.1207](/materials/material-no/1.1207 "1.1207") | Case hardening steels | 0.07–0.13 | 5 | | [C105U](/materials/din-en/c105u "C105U") | [1.1645](/materials/material-no/1.1645 "1.1645") | Unalloyed tool steels / carbon steels | 1–1.1 | 18 | | [C105U](/materials/din-en/c105u "C105U") | [1.1545](/materials/material-no/1.1545 "1.1545") | Unalloyed tool steels / carbon steels | 1–1.1 | 19 | | [C10GC](/materials/iso/c10gc "C10GC") | [1.0334](/materials/material-no/1.0334 "1.0334") | Unalloyed structural steels | ≤ 0.1 | 11 | | [C120U](/materials/din-en/c120u "C120U") | [1.1555](/materials/material-no/1.1555 "1.1555") | Unalloyed tool steels / carbon steels | 1.15–1.25 | 16 | | [C120U](/materials/din-en/c120u "C120U") | — | — | 1.15–1.24 | 7 | | [C15E4](/materials/iso/c15e4 "C15E4") | [1.1141](/materials/material-no/1.1141 "1.1141") | Case hardening steels | 0.12–0.18 | 20 | | [C15GC](/materials/iso/c15gc "C15GC") | [1.0234](/materials/material-no/1.0234 "1.0234") | Unalloyed structural steels | 0.13–0.17 | 7 | | [C15M2](/materials/iso/c15m2 "C15M2") | [1.1140](/materials/material-no/1.1140 "1.1140") | Case hardening steels | 0.12–0.18 | 7 | | [C15M2](/materials/iso/c15m2 "C15M2") | [1.1121](/materials/material-no/1.1121 "1.1121") | Case hardening steels | 0.07–0.13 | 22 | | [C15M2](/materials/iso/c15m2 "C15M2") | [1.1141](/materials/material-no/1.1141 "1.1141") | Case hardening steels | 0.12–0.18 | 20 | | [C16E4](/materials/iso/c16e4 "C16E4") | [1.1148](/materials/material-no/1.1148 "1.1148") | Case hardening steels | 0.12–0.18 | 7 | | [C17C](/materials/din-en/c17c "C17C") | — | — | 0.15–0.2 | 4 | | [C20E2C](/materials/din-en/c20e2c "C20E2C") | — | — | 0.18–0.23 | 4 | | [C20E2C](/materials/din-en/c20e2c "C20E2C") | — | — | 0.18–0.23 | 5 | | [C20GC](/materials/iso/c20gc "C20GC") | — | — | 0.18–0.23 | 5 | | [C25](/materials/din-en/c25 "C25") | [1.0402](/materials/material-no/1.0402 "1.0402") | Quenched and tempered steels | 0.17–0.24 | 24 | **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/page/3 "Previous") Page 4 of 11[Next](/materials/iso/page/5 "Next")