--- title: "UNI steel grades — 671 designations — Page 5" description: "Steel grades designated under UNI, with chemical composition, mechanical properties and equivalents in other standards. 671 designations across 331…" canonical: https://steelequivalents.com/materials/uni/page/5 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/uni/page/5.md cs: https://steelequivalents.com/cs/materiály/uni.md de: https://steelequivalents.com/de/werkstoffe/uni.md es: https://steelequivalents.com/es/materiales/uni.md fr: https://steelequivalents.com/fr/matériaux/uni.md hu: https://steelequivalents.com/hu/anyagok/uni.md it: https://steelequivalents.com/it/materiali/uni.md nl: https://steelequivalents.com/nl/materialen/uni.md pl: https://steelequivalents.com/pl/materiały/uni.md pt: https://steelequivalents.com/pt/materiais/uni.md ru: https://steelequivalents.com/ru/материалы/uni.md tr: https://steelequivalents.com/tr/malzemeler/uni.md zh: https://steelequivalents.com/zh/材料/uni.md ja: https://steelequivalents.com/ja/材料/uni.md ar: https://steelequivalents.com/ar/المواد/uni.md ko: https://steelequivalents.com/ko/재료/uni.md pt-br: https://steelequivalents.com/pt-br/materiais/uni.md hi: https://steelequivalents.com/hi/सामग्री/uni.md content_hash: sha256:3d61ff92db8bf076b112a7fd118a937551ebe152401105d68524d45bc36e0f6e 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/uni/page/5 > Canonical URL: https://steelequivalents.com/materials/uni/page/5 > 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. UNI · 671 grades # UNI steel grades — 671 designations — Page 5 Every grade designated under UNI, 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 671 designations | Grade | Material no. | Category | C% by weight | Also in other standards | |---|---|---|---|---| | [C28Mn](/materials/uni/c28mn "C28Mn") | [1.1165](/materials/material-no/1.1165 "1.1165") | Quenched and tempered steels | 0.25–0.32 | 16 | | [C30](/materials/din-en/c30 "C30") | [1.0528](/materials/material-no/1.0528 "1.0528") | Quenched and tempered steels | 0.27–0.34 | 14 | | [C30E](/materials/din-en/c30e "C30E") | [1.0528](/materials/material-no/1.0528 "1.0528") | Quenched and tempered steels | 0.27–0.34 | 14 | | [C30R](/materials/din-en/c30r "C30R") | [1.0528](/materials/material-no/1.0528 "1.0528") | Quenched and tempered steels | 0.27–0.34 | 14 | | [C35](/materials/din-en/c35 "C35") | [1.1181](/materials/material-no/1.1181 "1.1181") | Quenched and tempered steels | 0.32–0.39 | 20 | | [C35](/materials/din-en/c35 "C35") | [1.1180](/materials/material-no/1.1180 "1.1180") | Quenched and tempered steels | 0.32–0.39 | 11 | | [C35](/materials/din-en/c35 "C35") | [1.0501](/materials/material-no/1.0501 "1.0501") | Quenched and tempered steels | 0.32–0.39 | 23 | | [C35C](/materials/uni/c35c "C35C") | [1.0501](/materials/material-no/1.0501 "1.0501") | Quenched and tempered steels | 0.32–0.39 | 23 | | [C35E](/materials/din-en/c35e "C35E") | [1.0501](/materials/material-no/1.0501 "1.0501") | Quenched and tempered steels | 0.32–0.39 | 23 | | [C35R](/materials/din-en/c35r "C35R") | [1.0501](/materials/material-no/1.0501 "1.0501") | Quenched and tempered steels | 0.32–0.39 | 23 | | [C36](/materials/nbn/c36 "C36") | [1.1183](/materials/material-no/1.1183 "1.1183") | Steels for surface hardening | 0.33–0.39 | 7 | | [C36](/materials/nbn/c36 "C36") | [1.0501](/materials/material-no/1.0501 "1.0501") | Quenched and tempered steels | 0.32–0.39 | 23 | | [C36KU](/materials/uni/c36ku "C36KU") | [1.1545](/materials/material-no/1.1545 "1.1545") | Unalloyed tool steels / carbon steels | 1–1.1 | 19 | | [C38](/materials/uni/c38 "C38") | [1.0501](/materials/material-no/1.0501 "1.0501") | Quenched and tempered steels | 0.32–0.39 | 23 | | [C40](/materials/din-en/c40 "C40") | [1.1186](/materials/material-no/1.1186 "1.1186") | Quenched and tempered steels | 0.37–0.44 | 16 | | [C40](/materials/din-en/c40 "C40") | [1.1189](/materials/material-no/1.1189 "1.1189") | Quenched and tempered steels | 0.37–0.44 | 8 | | [C40](/materials/din-en/c40 "C40") | [1.0511](/materials/material-no/1.0511 "1.0511") | Quenched and tempered steels | 0.37–0.44 | 21 | | [C40E](/materials/din-en/c40e "C40E") | [1.0511](/materials/material-no/1.0511 "1.0511") | Quenched and tempered steels | 0.37–0.44 | 21 | | [C40R](/materials/din-en/c40r "C40R") | [1.0511](/materials/material-no/1.0511 "1.0511") | Quenched and tempered steels | 0.37–0.44 | 21 | | [C43](/materials/uni/c43 "C43") | [1.0503](/materials/material-no/1.0503 "1.0503") | Quenched and tempered steels | 0.42–0.5 | 24 | | [C45](/materials/din-en/c45 "C45") | [1.1201](/materials/material-no/1.1201 "1.1201") | Quenched and tempered steels | 0.42–0.5 | 11 | | [C45](/materials/din-en/c45 "C45") | [1.1191](/materials/material-no/1.1191 "1.1191") | Quenched and tempered steels | 0.42–0.5 | 21 | | [C45](/materials/din-en/c45 "C45") | [1.1191](/materials/material-no/1.1191 "1.1191") | Others | 0.42–0.5 | 18 | | [C45](/materials/din-en/c45 "C45") | [1.1730](/materials/material-no/1.1730 "1.1730") | Unalloyed tool steels / carbon steels | 0.42–0.5 | 14 | | [C45](/materials/din-en/c45 "C45") | [1.0503](/materials/material-no/1.0503 "1.0503") | Quenched and tempered steels | 0.42–0.5 | 24 | | [C45E](/materials/din-en/c45e "C45E") | [1.0503](/materials/material-no/1.0503 "1.0503") | Quenched and tempered steels | 0.42–0.5 | 24 | | [C45E](/materials/din-en/c45e "C45E") | [1.0912](/materials/material-no/1.0912 "1.0912") | Others | 0.42–0.5 | 11 | | [C45R](/materials/din-en/c45r "C45R") | [1.0503](/materials/material-no/1.0503 "1.0503") | Quenched and tempered steels | 0.42–0.5 | 24 | | [C46](/materials/din-en/c46 "C46") | [1.0503](/materials/material-no/1.0503 "1.0503") | Quenched and tempered steels | 0.42–0.5 | 24 | | [C50](/materials/din-en/c50 "C50") | [1.1206](/materials/material-no/1.1206 "1.1206") | Quenched and tempered steels | 0.47–0.55 | 17 | | [C50](/materials/din-en/c50 "C50") | [1.1241](/materials/material-no/1.1241 "1.1241") | Steels for surface hardening | 0.47–0.55 | 8 | | [C50](/materials/din-en/c50 "C50") | [1.1203](/materials/material-no/1.1203 "1.1203") | Quenched and tempered steels | 0.52–0.6 | 15 | | [C50](/materials/din-en/c50 "C50") | [1.0535](/materials/material-no/1.0535 "1.0535") | Quenched and tempered steels | 0.52–0.6 | 21 | | [C50](/materials/din-en/c50 "C50") | [1.0540](/materials/material-no/1.0540 "1.0540") | Quenched and tempered steels | 0.47–0.55 | 13 | | [C50E](/materials/din-en/c50e "C50E") | [1.0540](/materials/material-no/1.0540 "1.0540") | Quenched and tempered steels | 0.47–0.55 | 13 | | [C50E](/materials/din-en/c50e "C50E") | [1.0586](/materials/material-no/1.0586 "1.0586") | Steels for surface hardening | 0.48–0.53 | 7 | | [C50E](/materials/din-en/c50e "C50E") | [1.1213](/materials/material-no/1.1213 "1.1213") | Steels for surface hardening | 0.5–0.57 | 11 | | [C50E](/materials/din-en/c50e "C50E") | [1.1241](/materials/material-no/1.1241 "1.1241") | Steels for surface hardening | 0.47–0.55 | 8 | | [C50E](/materials/din-en/c50e "C50E") | [1.9505](/materials/material-no/1.9505 "1.9505") | Steels for surface hardening | 0.48–0.55 | 6 | | [C50E](/materials/din-en/c50e "C50E") | [1.0535](/materials/material-no/1.0535 "1.0535") | Quenched and tempered steels | 0.52–0.6 | 21 | | [C50R](/materials/din-en/c50r "C50R") | [1.0535](/materials/material-no/1.0535 "1.0535") | Quenched and tempered steels | 0.52–0.6 | 21 | | [C53](/materials/nbn/c53 "C53") | [1.1213](/materials/material-no/1.1213 "1.1213") | Steels for surface hardening | 0.5–0.57 | 11 | | [C53](/materials/nbn/c53 "C53") | [1.0535](/materials/material-no/1.0535 "1.0535") | Quenched and tempered steels | 0.52–0.6 | 21 | | [C55](/materials/din-en/c55 "C55") | [1.1203](/materials/material-no/1.1203 "1.1203") | Quenched and tempered steels | 0.52–0.6 | 15 | | [C55](/materials/din-en/c55 "C55") | [1.1209](/materials/material-no/1.1209 "1.1209") | Others | 0.52–0.6 | 8 | | [C55](/materials/din-en/c55 "C55") | [1.0535](/materials/material-no/1.0535 "1.0535") | Quenched and tempered steels | 0.52–0.6 | 21 | | [C55E](/materials/din-en/c55e "C55E") | [1.0535](/materials/material-no/1.0535 "1.0535") | Quenched and tempered steels | 0.52–0.6 | 21 | | [C55R](/materials/din-en/c55r "C55R") | [1.0535](/materials/material-no/1.0535 "1.0535") | Quenched and tempered steels | 0.52–0.6 | 21 | | [C60](/materials/din-en/c60 "C60") | [1.1223](/materials/material-no/1.1223 "1.1223") | Quenched and tempered steels | 0.57–0.65 | 4 | | [C60](/materials/din-en/c60 "C60") | [1.1221](/materials/material-no/1.1221 "1.1221") | Quenched and tempered steels | 0.57–0.65 | 18 | **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/uni/page/4 "Previous") Page 5 of 14[Next](/materials/uni/page/6 "Next")