--- title: "UNI steel grades — 671 designations — Page 11" 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/11 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/uni/page/11.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:ae0340ae070efa05d07ac90672b5fe8de3e538f67a355e4770e504ed31f18339 generated: 2026-09-25 --- > **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/11 > Canonical URL: https://steelequivalents.com/materials/uni/page/11 > 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 11 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 | |---|---|---|---|---| | [KB](/materials/uni/kb "KB") | [1.6546](/materials/material-no/1.6546 "1.6546") | Quenched and tempered steels | 0.37–0.44 | 14 | | [KB](/materials/uni/kb "KB") | [1.6511](/materials/material-no/1.6511 "1.6511") | Quenched and tempered steels | 0.32–0.4 | 18 | | [KB](/materials/uni/kb "KB") | [1.6582](/materials/material-no/1.6582 "1.6582") | Quenched and tempered steels | 0.3–0.38 | 25 | | [KB](/materials/uni/kb "KB") | [1.7033](/materials/material-no/1.7033 "1.7033") | Quenched and tempered steels | 0.3–0.37 | 18 | | [KB](/materials/uni/kb "KB") | [1.7218](/materials/material-no/1.7218 "1.7218") | Quenched and tempered steels | 0.22–0.29 | 25 | | [NCM 4](/materials/uni/ncm-4 "NCM 4") | [1.6565](/materials/material-no/1.6565 "1.6565") | Quenched and tempered steels | 0.35–0.45 | 15 | | [NCM 4](/materials/uni/ncm-4 "NCM 4") | [1.6562](/materials/material-no/1.6562 "1.6562") | Quenched and tempered steels | 0.37–0.44 | 10 | | [NCM 4](/materials/uni/ncm-4 "NCM 4") | [1.6745](/materials/material-no/1.6745 "1.6745") | Others | 0.37–0.43 | 4 | | [P265GH](/materials/din-en/p265gh "P265GH") | [1.0425](/materials/material-no/1.0425 "1.0425") | Heat-resistant structural steels | ≤ 0.2 | 20 | | [P265GH](/materials/din-en/p265gh "P265GH") | [1.0426](/materials/material-no/1.0426 "1.0426") | Aging resistant steels | 0.08–0.2 | 17 | | [P269GH](/materials/uni/p269gh "P269GH") | [1.0425](/materials/material-no/1.0425 "1.0425") | Heat-resistant structural steels | ≤ 0.2 | 20 | | [P295GH](/materials/din-en/p295gh "P295GH") | [1.0481](/materials/material-no/1.0481 "1.0481") | Heat-resistant structural steels | 0.08–0.2 | 17 | | [P355N](/materials/din-en/p355n "P355N") | [1.0562](/materials/material-no/1.0562 "1.0562") | Fine-grain structural steels | ≤ 0.18 | 18 | | [P45-06](/materials/uni/p45-06 "P45-06") | [EN-JM1140](/materials/material-no/en-jm1140 "EN-JM1140") | Others | — | 10 | | [P460N](/materials/din-en/p460n "P460N") | [1.8905](/materials/material-no/1.8905 "1.8905") | Fine-grain structural steels | ≤ 0.2 | 14 | | [P460N](/materials/din-en/p460n "P460N") | [1.5218](/materials/material-no/1.5218 "1.5218") | Others | 0.2–0.23 | 13 | | [P55-04](/materials/uni/p55-04 "P55-04") | [EN-JM1160](/materials/material-no/en-jm1160 "EN-JM1160") | Others | — | 8 | | [S185](/materials/din-en/s185 "S185") | [1.0035](/materials/material-no/1.0035 "1.0035") | Unalloyed structural steels | — | 22 | | [S235J0](/materials/din-en/s235j0 "S235J0") | [1.0038](/materials/material-no/1.0038 "1.0038") | Unalloyed structural steels | ≤ 0.17 | 26 | | [S235J0](/materials/din-en/s235j0 "S235J0") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 20 | | [S235J0](/materials/din-en/s235j0 "S235J0") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 19 | | [S235J0](/materials/din-en/s235j0 "S235J0") | [1.0028](/materials/material-no/1.0028 "1.0028") | Unalloyed structural steels | ≤ 0.15 | 18 | | [S235J2G3](/materials/din-en/s235j2g3 "S235J2G3") | [1.0038](/materials/material-no/1.0038 "1.0038") | Unalloyed structural steels | ≤ 0.17 | 26 | | [S235J2G3](/materials/din-en/s235j2g3 "S235J2G3") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 20 | | [S235J2G3](/materials/din-en/s235j2g3 "S235J2G3") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 19 | | [S235J2G3](/materials/din-en/s235j2g3 "S235J2G3") | [1.0028](/materials/material-no/1.0028 "1.0028") | Unalloyed structural steels | ≤ 0.15 | 18 | | [S235J2G4](/materials/din-en/s235j2g4 "S235J2G4") | [1.0038](/materials/material-no/1.0038 "1.0038") | Unalloyed structural steels | ≤ 0.17 | 26 | | [S235J2G4](/materials/din-en/s235j2g4 "S235J2G4") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 20 | | [S235J2G4](/materials/din-en/s235j2g4 "S235J2G4") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 19 | | [S235J2G4](/materials/din-en/s235j2g4 "S235J2G4") | [1.0028](/materials/material-no/1.0028 "1.0028") | Unalloyed structural steels | ≤ 0.15 | 18 | | [S235JRG1](/materials/din-en/s235jrg1 "S235JRG1") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 20 | | [S235JRG1](/materials/din-en/s235jrg1 "S235JRG1") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 19 | | [S235JRG1](/materials/din-en/s235jrg1 "S235JRG1") | [1.0028](/materials/material-no/1.0028 "1.0028") | Unalloyed structural steels | ≤ 0.15 | 18 | | [S235JRG2](/materials/din-en/s235jrg2 "S235JRG2") | [1.0038](/materials/material-no/1.0038 "1.0038") | Unalloyed structural steels | ≤ 0.17 | 26 | | [S275JR](/materials/din-en/s275jr "S275JR") | [1.0044](/materials/material-no/1.0044 "1.0044") | Unalloyed structural steels | ≤ 0.21 | 26 | | [S355J0](/materials/uni/s355j0 "S355J0") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 22 | | [S355J0](/materials/uni/s355j0 "S355J0") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 20 | | [S355J2G3](/materials/din-en/s355j2g3 "S355J2G3") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 22 | | [S355J2G3](/materials/din-en/s355j2g3 "S355J2G3") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 20 | | [S355J2G4](/materials/din-en/s355j2g4 "S355J2G4") | [1.0577](/materials/material-no/1.0577 "1.0577") | Unalloyed structural steels | ≤ 0.2 | 11 | | [S355JOWP](/materials/uni/s355jowp "S355JOWP") | [1.8945](/materials/material-no/1.8945 "1.8945") | Weathering steels | ≤ 0.12 | 16 | | [S355JR](/materials/din-en/s355jr "S355JR") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 22 | | [S355JR](/materials/din-en/s355jr "S355JR") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 20 | | [UD12](/materials/uni/ud12 "UD12") | [1.2343](/materials/material-no/1.2343 "1.2343") | Tool steels for hot work | 0.33–0.41 | 20 | | [UD14](/materials/uni/ud14 "UD14") | [1.2344](/materials/material-no/1.2344 "1.2344") | Tool steels for hot work | 0.35–0.42 | 20 | | [VM11](/materials/uni/vm11 "VM11") | [1.4718](/materials/material-no/1.4718 "1.4718") | Others | 0.4–0.5 | 16 | | [VM12D](/materials/uni/vm12d "VM12D") | [1.4731](/materials/material-no/1.4731 "1.4731") | Valve steels | 0.35–0.45 | 12 | | [X100CrMoV51KU](/materials/uni/x100crmov51ku "X100CrMoV51KU") | [1.2363](/materials/material-no/1.2363 "1.2363") | Tool steels for cold work | 0.95–1.05 | 16 | | [X100CrMoV5KU](/materials/uni/x100crmov5ku "X100CrMoV5KU") | [1.2363](/materials/material-no/1.2363 "1.2363") | Tool steels for cold work | 0.95–1.05 | 16 | | [X10Cr13](/materials/din-en/x10cr13 "X10Cr13") | [1.4006](/materials/material-no/1.4006 "1.4006") | Stainless steels | 0.08–0.15 | 26 | **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/10 "Previous") Page 11 of 14[Next](/materials/uni/page/12 "Next")