--- title: "UNI steel grades — 671 designations — Page 8" 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/8 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/uni/page/8.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: sha256:7b52ca70e5d00c604fa9d03c61142e19028cc240c1d5d639730f8795b5141e3e generated: 2026-09-23 --- > **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/8 > Canonical URL: https://steelequivalents.com/materials/uni/page/8 > 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 8 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 | |---|---|---|---|---| | [Fe430D(FF)](/materials/uni/fe430d-ff "Fe430D(FF)") | [1.0044](/materials/material-no/1.0044 "1.0044") | Unalloyed structural steels | ≤ 0.21 | 26 | | [Fe460-1KG](/materials/uni/fe460-1kg "Fe460-1KG") | [1.0481](/materials/material-no/1.0481 "1.0481") | Heat-resistant structural steels | 0.08–0.2 | 17 | | [Fe460-1KG](/materials/uni/fe460-1kg "Fe460-1KG") | [1.0445](/materials/material-no/1.0445 "1.0445") | Higher strength steels | — | 12 | | [Fe460-1KW](/materials/uni/fe460-1kw "Fe460-1KW") | [1.0481](/materials/material-no/1.0481 "1.0481") | Heat-resistant structural steels | 0.08–0.2 | 17 | | [Fe480](/materials/uni/fe480 "Fe480") | [1.0050](/materials/material-no/1.0050 "1.0050") | Unalloyed structural steels | — | 23 | | [Fe480](/materials/uni/fe480 "Fe480") | [1.0050](/materials/material-no/1.0050 "1.0050") | Unalloyed structural steels | — | 23 | | [Fe490](/materials/iso/fe490 "Fe490") | [1.0050](/materials/material-no/1.0050 "1.0050") | Unalloyed structural steels | — | 23 | | [Fe490](/materials/iso/fe490 "Fe490") | [1.0050](/materials/material-no/1.0050 "1.0050") | Unalloyed structural steels | — | 23 | | [Fe490](/materials/iso/fe490 "Fe490") | [1.0533](/materials/material-no/1.0533 "1.0533") | Others | — | 3 | | [Fe510](/materials/bs/fe510 "Fe510") | [1.0580](/materials/material-no/1.0580 "1.0580") | Unalloyed structural steels | ≤ 0.22 | 10 | | [Fe510](/materials/bs/fe510 "Fe510") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 22 | | [Fe510](/materials/bs/fe510 "Fe510") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 20 | | [Fe510-1KG](/materials/uni/fe510-1kg "Fe510-1KG") | [1.0436](/materials/material-no/1.0436 "1.0436") | Fine-grain structural steels | 0.15–0.2 | 14 | | [Fe510-1KG](/materials/uni/fe510-1kg "Fe510-1KG") | [1.0481](/materials/material-no/1.0481 "1.0481") | Heat-resistant structural steels | 0.08–0.2 | 17 | | [Fe510-1KT](/materials/uni/fe510-1kt "Fe510-1KT") | [1.0481](/materials/material-no/1.0481 "1.0481") | Heat-resistant structural steels | 0.08–0.2 | 17 | | [Fe510-1KW](/materials/uni/fe510-1kw "Fe510-1KW") | [1.0473](/materials/material-no/1.0473 "1.0473") | Heat-resistant structural steels | 0.1–0.22 | 10 | | [Fe510-1KW](/materials/uni/fe510-1kw "Fe510-1KW") | [1.0436](/materials/material-no/1.0436 "1.0436") | Fine-grain structural steels | 0.15–0.2 | 14 | | [Fe510-1KW](/materials/uni/fe510-1kw "Fe510-1KW") | [1.0481](/materials/material-no/1.0481 "1.0481") | Heat-resistant structural steels | 0.08–0.2 | 17 | | [Fe510-2KG](/materials/uni/fe510-2kg "Fe510-2KG") | [1.0481](/materials/material-no/1.0481 "1.0481") | Heat-resistant structural steels | 0.08–0.2 | 17 | | [Fe510-2KT](/materials/uni/fe510-2kt "Fe510-2KT") | [1.0481](/materials/material-no/1.0481 "1.0481") | Heat-resistant structural steels | 0.08–0.2 | 17 | | [Fe510-2KW](/materials/uni/fe510-2kw "Fe510-2KW") | [1.0481](/materials/material-no/1.0481 "1.0481") | Heat-resistant structural steels | 0.08–0.2 | 17 | | [Fe510B](/materials/uni/fe510b "Fe510B") | [1.0045](/materials/material-no/1.0045 "1.0045") | Unalloyed structural steels | ≤ 0.24 | 17 | | [Fe510B](/materials/uni/fe510b "Fe510B") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 22 | | [Fe510B](/materials/uni/fe510b "Fe510B") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 20 | | [Fe510C](/materials/uni/fe510c "Fe510C") | [1.0553](/materials/material-no/1.0553 "1.0553") | Unalloyed structural steels | ≤ 0.2 | 20 | | [Fe510C](/materials/uni/fe510c "Fe510C") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 22 | | [Fe510C](/materials/uni/fe510c "Fe510C") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 20 | | [Fe510C1K1](/materials/uni/fe510c1k1 "Fe510C1K1") | [1.8945](/materials/material-no/1.8945 "1.8945") | Weathering steels | ≤ 0.12 | 16 | | [Fe510C2K1](/materials/uni/fe510c2k1 "Fe510C2K1") | [1.8959](/materials/material-no/1.8959 "1.8959") | Weathering steels | ≤ 0.16 | 10 | | [Fe510CFN](/materials/uni/fe510cfn "Fe510CFN") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 22 | | [Fe510CFN](/materials/uni/fe510cfn "Fe510CFN") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 20 | | [Fe510D](/materials/uni/fe510d "Fe510D") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 22 | | [Fe510D](/materials/uni/fe510d "Fe510D") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 20 | | [Fe510D](/materials/uni/fe510d "Fe510D") | [1.0579](/materials/material-no/1.0579 "1.0579") | Unalloyed structural steels | ≤ 0.2 | 3 | | [FE510D](/materials/uni/fe510d "FE510D") | [1.0577](/materials/material-no/1.0577 "1.0577") | Unalloyed structural steels | ≤ 0.2 | 11 | | [Fe510D1K1](/materials/uni/fe510d1k1 "Fe510D1K1") | [1.8946](/materials/material-no/1.8946 "1.8946") | Weathering steels | ≤ 0.12 | 4 | | [Fe510D2K1](/materials/uni/fe510d2k1 "Fe510D2K1") | [1.8963](/materials/material-no/1.8963 "1.8963") | Weathering steels | ≤ 0.16 | 9 | | [Fe52](/materials/uni/fe52 "Fe52") | [1.0841](/materials/material-no/1.0841 "1.0841") | Unalloyed structural steels | — | 6 | | [Fe52BFN](/materials/uni/fe52bfn "Fe52BFN") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 22 | | [Fe52BFN](/materials/uni/fe52bfn "Fe52BFN") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 20 | | [Fe52CFN](/materials/uni/fe52cfn "Fe52CFN") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 22 | | [Fe52CFN](/materials/uni/fe52cfn "Fe52CFN") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 20 | | [Fe540](/materials/uni/fe540 "Fe540") | [1.0507](/materials/material-no/1.0507 "1.0507") | Others | ≤ 0.2 | 8 | | [Fe580](/materials/uni/fe580 "Fe580") | [1.0060](/materials/material-no/1.0060 "1.0060") | Unalloyed structural steels | — | 21 | | [Fe580](/materials/uni/fe580 "Fe580") | [1.0060](/materials/material-no/1.0060 "1.0060") | Unalloyed structural steels | — | 21 | | [Fe590](/materials/uni/fe590 "Fe590") | [1.0060](/materials/material-no/1.0060 "1.0060") | Unalloyed structural steels | — | 21 | | [Fe590](/materials/uni/fe590 "Fe590") | [1.0060](/materials/material-no/1.0060 "1.0060") | Unalloyed structural steels | — | 21 | | [Fe590](/materials/uni/fe590 "Fe590") | [1.0543](/materials/material-no/1.0543 "1.0543") | Unalloyed structural steels | — | 2 | | [Fe60-2](/materials/uni/fe60-2 "Fe60-2") | [1.0060](/materials/material-no/1.0060 "1.0060") | Unalloyed structural steels | — | 21 | | [Fe60-2](/materials/uni/fe60-2 "Fe60-2") | [1.0060](/materials/material-no/1.0060 "1.0060") | Unalloyed structural steels | — | 21 | **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/7 "Previous") Page 8 of 14[Next](/materials/uni/page/9 "Next")