--- title: "UNI steel grades — 671 designations — Page 7" 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/7 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/uni/page/7.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: sha256:3adacd49e83635e73325a4f042d9e5f9158e2f549fbb9ad9a15a4d102c12cc4d 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/7 > Canonical URL: https://steelequivalents.com/materials/uni/page/7 > 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 7 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 | |---|---|---|---|---| | [Fe360B](/materials/une/fe360b "Fe360B") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 19 | | [Fe360B](/materials/une/fe360b "Fe360B") | [1.0028](/materials/material-no/1.0028 "1.0028") | Unalloyed structural steels | ≤ 0.15 | 18 | | [Fe360BFN](/materials/uni/fe360bfn "Fe360BFN") | [1.0038](/materials/material-no/1.0038 "1.0038") | Unalloyed structural steels | ≤ 0.17 | 26 | | [Fe360BFU](/materials/bs/fe360bfu "Fe360BFU") | [1.0028](/materials/material-no/1.0028 "1.0028") | Unalloyed structural steels | ≤ 0.15 | 18 | | [Fe360BFU](/materials/bs/fe360bfu "Fe360BFU") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 20 | | [Fe360BFU](/materials/bs/fe360bfu "Fe360BFU") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 19 | | [Fe360C](/materials/iso/fe360c "Fe360C") | [1.0114](/materials/material-no/1.0114 "1.0114") | Unalloyed structural steels | ≤ 0.17 | 21 | | [Fe360C](/materials/iso/fe360c "Fe360C") | [1.0038](/materials/material-no/1.0038 "1.0038") | Unalloyed structural steels | ≤ 0.17 | 26 | | [Fe360C](/materials/iso/fe360c "Fe360C") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 20 | | [Fe360C](/materials/iso/fe360c "Fe360C") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 19 | | [Fe360C](/materials/iso/fe360c "Fe360C") | [1.0028](/materials/material-no/1.0028 "1.0028") | Unalloyed structural steels | ≤ 0.15 | 18 | | [Fe360CFN](/materials/uni/fe360cfn "Fe360CFN") | [1.0038](/materials/material-no/1.0038 "1.0038") | Unalloyed structural steels | ≤ 0.17 | 26 | | [Fe360CFN](/materials/uni/fe360cfn "Fe360CFN") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 20 | | [Fe360CFN](/materials/uni/fe360cfn "Fe360CFN") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 19 | | [Fe360CFN](/materials/uni/fe360cfn "Fe360CFN") | [1.0028](/materials/material-no/1.0028 "1.0028") | Unalloyed structural steels | ≤ 0.15 | 18 | | [Fe360CK1](/materials/uni/fe360ck1 "Fe360CK1") | [1.8958](/materials/material-no/1.8958 "1.8958") | Weathering steels | ≤ 0.13 | 3 | | [Fe360D](/materials/uni/fe360d "Fe360D") | [1.0038](/materials/material-no/1.0038 "1.0038") | Unalloyed structural steels | ≤ 0.17 | 26 | | [Fe360D](/materials/uni/fe360d "Fe360D") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 20 | | [Fe360D](/materials/uni/fe360d "Fe360D") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 19 | | [Fe360D](/materials/uni/fe360d "Fe360D") | [1.0028](/materials/material-no/1.0028 "1.0028") | Unalloyed structural steels | ≤ 0.15 | 18 | | [Fe360DFF](/materials/uni/fe360dff "Fe360DFF") | [1.0038](/materials/material-no/1.0038 "1.0038") | Unalloyed structural steels | ≤ 0.17 | 26 | | [Fe360DFF](/materials/uni/fe360dff "Fe360DFF") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 20 | | [Fe360DFF](/materials/uni/fe360dff "Fe360DFF") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 19 | | [Fe360DFF](/materials/uni/fe360dff "Fe360DFF") | [1.0028](/materials/material-no/1.0028 "1.0028") | Unalloyed structural steels | ≤ 0.15 | 18 | | [Fe360DK1](/materials/uni/fe360dk1 "Fe360DK1") | [1.8961](/materials/material-no/1.8961 "1.8961") | Weathering steels | ≤ 0.13 | 3 | | [Fe37-2](/materials/uni/fe37-2 "Fe37-2") | [1.0038](/materials/material-no/1.0038 "1.0038") | Unalloyed structural steels | ≤ 0.17 | 26 | | [Fe37-2](/materials/uni/fe37-2 "Fe37-2") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 20 | | [Fe37-2](/materials/uni/fe37-2 "Fe37-2") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 19 | | [Fe37-2](/materials/uni/fe37-2 "Fe37-2") | [1.0028](/materials/material-no/1.0028 "1.0028") | Unalloyed structural steels | ≤ 0.15 | 18 | | [Fe410-1KW](/materials/uni/fe410-1kw "Fe410-1KW") | [1.0425](/materials/material-no/1.0425 "1.0425") | Heat-resistant structural steels | ≤ 0.2 | 20 | | [Fe410-2KG](/materials/uni/fe410-2kg "Fe410-2KG") | [1.0437](/materials/material-no/1.0437 "1.0437") | Others | ≤ 0.2 | 8 | | [Fe410-2KW](/materials/uni/fe410-2kw "Fe410-2KW") | [1.0130](/materials/material-no/1.0130 "1.0130") | Unalloyed structural steels | ≤ 0.2 | 4 | | [Fe4101KG](/materials/uni/fe4101kg "Fe4101KG") | [1.0425](/materials/material-no/1.0425 "1.0425") | Heat-resistant structural steels | ≤ 0.2 | 20 | | [Fe4101KT](/materials/uni/fe4101kt "Fe4101KT") | [1.0425](/materials/material-no/1.0425 "1.0425") | Heat-resistant structural steels | ≤ 0.2 | 20 | | [Fe4102KG](/materials/uni/fe410-2kg "Fe4102KG") | [1.0426](/materials/material-no/1.0426 "1.0426") | Aging resistant steels | 0.08–0.2 | 17 | | [Fe4102KW](/materials/uni/fe410-2kw "Fe4102KW") | [1.0426](/materials/material-no/1.0426 "1.0426") | Aging resistant steels | 0.08–0.2 | 17 | | [Fe410KG](/materials/uni/fe410kg "Fe410KG") | [1.0425](/materials/material-no/1.0425 "1.0425") | Heat-resistant structural steels | ≤ 0.2 | 20 | | [Fe410KT](/materials/uni/fe410kt "Fe410KT") | [1.0425](/materials/material-no/1.0425 "1.0425") | Heat-resistant structural steels | ≤ 0.2 | 20 | | [Fe410KW](/materials/uni/fe410kw "Fe410KW") | [1.0426](/materials/material-no/1.0426 "1.0426") | Aging resistant steels | 0.08–0.2 | 17 | | [Fe410KW](/materials/uni/fe410kw "Fe410KW") | [1.0425](/materials/material-no/1.0425 "1.0425") | Heat-resistant structural steels | ≤ 0.2 | 20 | | [Fe410KW](/materials/uni/fe410kw "Fe410KW") | [1.8945](/materials/material-no/1.8945 "1.8945") | Weathering steels | ≤ 0.12 | 16 | | [Fe420TM](/materials/uni/fe420tm "Fe420TM") | [1.0980](/materials/material-no/1.0980 "1.0980") | Fine-grain steels for cold forming | ≤ 0.12 | 8 | | [FE430B](/materials/iso/fe430b "FE430B") | [1.0044](/materials/material-no/1.0044 "1.0044") | Unalloyed structural steels | ≤ 0.21 | 26 | | [Fe430B](/materials/iso/fe430b "Fe430B") | [1.0144](/materials/material-no/1.0144 "1.0144") | Unalloyed structural steels | ≤ 0.18 | 22 | | [Fe430BFN](/materials/uni/fe430bfn "Fe430BFN") | [1.0044](/materials/material-no/1.0044 "1.0044") | Unalloyed structural steels | ≤ 0.21 | 26 | | [Fe430C](/materials/iso/fe430c "Fe430C") | [1.0143](/materials/material-no/1.0143 "1.0143") | Unalloyed structural steels | ≤ 0.18 | 16 | | [Fe430C(FN)](/materials/uni/fe430c-fn "Fe430C(FN)") | [1.0144](/materials/material-no/1.0144 "1.0144") | Unalloyed structural steels | ≤ 0.18 | 22 | | [Fe430C(FN)](/materials/uni/fe430c-fn "Fe430C(FN)") | [1.0044](/materials/material-no/1.0044 "1.0044") | Unalloyed structural steels | ≤ 0.21 | 26 | | [Fe430D](/materials/uni/fe430d "Fe430D") | [1.0144](/materials/material-no/1.0144 "1.0144") | Unalloyed structural steels | ≤ 0.18 | 22 | | [Fe430D(FF)](/materials/uni/fe430d-ff "Fe430D(FF)") | [1.0144](/materials/material-no/1.0144 "1.0144") | Unalloyed structural steels | ≤ 0.18 | 22 | **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/6 "Previous") Page 7 of 14[Next](/materials/uni/page/8 "Next")