--- title: "STAS steel grades — 203 designations — Page 2" description: "Steel grades designated under STAS, with chemical composition, mechanical properties and equivalents in other standards. 203 designations across 142…" canonical: https://steelequivalents.com/materials/stas/page/2 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/stas/page/2.md cs: https://steelequivalents.com/cs/materiály/stas.md de: https://steelequivalents.com/de/werkstoffe/stas.md es: https://steelequivalents.com/es/materiales/stas.md fr: https://steelequivalents.com/fr/matériaux/stas.md hu: https://steelequivalents.com/hu/anyagok/stas.md it: https://steelequivalents.com/it/materiali/stas.md nl: https://steelequivalents.com/nl/materialen/stas.md pl: https://steelequivalents.com/pl/materiały/stas.md pt: https://steelequivalents.com/pt/materiais/stas.md ru: https://steelequivalents.com/ru/материалы/stas.md tr: https://steelequivalents.com/tr/malzemeler/stas.md zh: https://steelequivalents.com/zh/材料/stas.md ja: https://steelequivalents.com/ja/材料/stas.md ar: https://steelequivalents.com/ar/المواد/stas.md ko: https://steelequivalents.com/ko/재료/stas.md pt-br: https://steelequivalents.com/pt-br/materiais/stas.md hi: https://steelequivalents.com/hi/सामग्री/stas.md content_hash: sha256:d9cec6cdf09c0328b31e6c6a189463da6e8e0be39e59fc384779547752f42f49 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/stas/page/2 > Canonical URL: https://steelequivalents.com/materials/stas/page/2 > 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. STAS · 203 grades # STAS steel grades — 203 designations — Page 2 Every grade designated under STAS, 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 203 designations | Grade | Material no. | Category | C% by weight | Also in other standards | |---|---|---|---|---| | [34MoCrNi16](/materials/stas/34mocrni16 "34MoCrNi16") | [1.6582](/materials/material-no/1.6582 "1.6582") | Quenched and tempered steels | 0.3–0.38 | 25 | | [34MoCrNi16q](/materials/stas/34mocrni16q "34MoCrNi16q") | [1.6582](/materials/material-no/1.6582 "1.6582") | Quenched and tempered steels | 0.3–0.38 | 25 | | [35Mn16](/materials/stas/35mn16 "35Mn16") | [1.1167](/materials/material-no/1.1167 "1.1167") | Quenched and tempered steels | 0.32–0.4 | 17 | | [39VSiMoCr52](/materials/stas/39vsimocr52 "39VSiMoCr52") | [1.2343](/materials/material-no/1.2343 "1.2343") | Tool steels for hot work | 0.33–0.41 | 20 | | [40Cr10](/materials/stas/40cr10 "40Cr10") | [1.7034](/materials/material-no/1.7034 "1.7034") | Quenched and tempered steels | 0.34–0.41 | 23 | | [40Cr10q](/materials/stas/40cr10q "40Cr10q") | [1.7034](/materials/material-no/1.7034 "1.7034") | Quenched and tempered steels | 0.34–0.41 | 23 | | [40Cr10X](/materials/stas/40cr10x "40Cr10X") | [1.7034](/materials/material-no/1.7034 "1.7034") | Quenched and tempered steels | 0.34–0.41 | 23 | | [40CrNi12](/materials/stas/40crni12 "40CrNi12") | [1.5710](/materials/material-no/1.5710 "1.5710") | Quenched and tempered steels | 0.32–0.4 | 14 | | [40CrNi12q](/materials/stas/40crni12q "40CrNi12q") | [1.5710](/materials/material-no/1.5710 "1.5710") | Quenched and tempered steels | 0.32–0.4 | 14 | | [40VSiMoCr52](/materials/stas/40vsimocr52 "40VSiMoCr52") | [1.2344](/materials/material-no/1.2344 "1.2344") | Tool steels for hot work | 0.35–0.42 | 20 | | [41MoCr11](/materials/stas/41mocr11 "41MoCr11") | [1.7225](/materials/material-no/1.7225 "1.7225") | Quenched and tempered steels | 0.38–0.45 | 25 | | [41MoCr11](/materials/stas/41mocr11 "41MoCr11") | [1.7227](/materials/material-no/1.7227 "1.7227") | Quenched and tempered steels | 0.38–0.45 | 15 | | [42MoCr11](/materials/stas/42mocr11 "42MoCr11") | [1.7225](/materials/material-no/1.7225 "1.7225") | Quenched and tempered steels | 0.38–0.45 | 25 | | [45SiCr90](/materials/stas/45sicr90 "45SiCr90") | [1.4718](/materials/material-no/1.4718 "1.4718") | Valve steels | 0.4–0.5 | 16 | | [45SiCr90](/materials/stas/45sicr90 "45SiCr90") | [1.4718](/materials/material-no/1.4718 "1.4718") | Others | 0.4–0.5 | 16 | | [45WNiCr180](/materials/stas/45wnicr180 "45WNiCr180") | [1.4873](/materials/material-no/1.4873 "1.4873") | Valve steels | 0.4–0.5 | 11 | | [51VCr11A](/materials/stas/51vcr11a "51VCr11A") | [1.8159](/materials/material-no/1.8159 "1.8159") | Quenched and tempered steels | 0.47–0.55 | 27 | | [51VMnCr11](/materials/stas/51vmncr11 "51VMnCr11") | [1.8159](/materials/material-no/1.8159 "1.8159") | Quenched and tempered steels | 0.47–0.55 | 27 | | [51VMnCr11AT](/materials/stas/51vmncr11at "51VMnCr11AT") | [1.8159](/materials/material-no/1.8159 "1.8159") | Quenched and tempered steels | 0.47–0.55 | 27 | | [53NNiMnCr210](/materials/stas/53nnimncr210 "53NNiMnCr210") | [1.4871](/materials/material-no/1.4871 "1.4871") | Valve steels | 0.48–0.58 | 17 | | [55MoCrNi16](/materials/stas/55mocrni16 "55MoCrNi16") | [1.2711](/materials/material-no/1.2711 "1.2711") | Tool steels for cold work | 0.5–0.6 | 16 | | [55VMoCrNi16](/materials/stas/55vmocrni16 "55VMoCrNi16") | [1.2711](/materials/material-no/1.2711 "1.2711") | Tool steels for cold work | 0.5–0.6 | 16 | | [56Si17A](/materials/stas/56si17a "56Si17A") | [1.5026](/materials/material-no/1.5026 "1.5026") | Spring steels | 0.52–0.6 | 20 | | [60Si15A](/materials/stas/60si15a "60Si15A") | [1.7102](/materials/material-no/1.7102 "1.7102") | Spring steels | 0.51–0.59 | 14 | | [65MN10](/materials/stas/65mn10 "65MN10") | [1.1260](/materials/material-no/1.1260 "1.1260") | Others | 0.6–0.71 | 7 | | [65MN10](/materials/stas/65mn10 "65MN10") | [1.1240](/materials/material-no/1.1240 "1.1240") | Others | 0.6–0.7 | 10 | | [65MN10](/materials/stas/65mn10 "65MN10") | [1.1233](/materials/material-no/1.1233 "1.1233") | Quenched and tempered steels | 0.52–0.6 | 7 | | [8TiCr170](/materials/stas/8ticr170 "8TiCr170") | [1.4510](/materials/material-no/1.4510 "1.4510") | Stainless steels | ≤ 0.05 | 14 | | [8TiCr170](/materials/stas/8ticr170 "8TiCr170") | [1.4511](/materials/material-no/1.4511 "1.4511") | Stainless steels | ≤ 0.05 | 11 | | [9SiMn16](/materials/stas/9simn16 "9SiMn16") | [1.0479](/materials/material-no/1.0479 "1.0479") | Others | 0.08–0.14 | 6 | | [A1n](/materials/stas/a1n "A1n") | [1.0322](/materials/material-no/1.0322 "1.0322") | Unalloyed structural steels | ≤ 0.12 | 17 | | [A3k](/materials/stas/a3k "A3k") | [1.0338](/materials/material-no/1.0338 "1.0338") | Unalloyed structural steels | ≤ 0.08 | 18 | | [A5](/materials/bs/a5 "A5") | [1.0314](/materials/material-no/1.0314 "1.0314") | Unalloyed structural steels | ≤ 0.03 | 14 | | [AUT12](/materials/stas/aut12 "AUT12") | [1.0721](/materials/material-no/1.0721 "1.0721") | Free cutting steels | 0.07–0.13 | 15 | | [AUT30](/materials/stas/aut30 "AUT30") | [1.0726](/materials/material-no/1.0726 "1.0726") | Free cutting steels | 0.32–0.39 | 15 | | [AUT40Mn](/materials/stas/aut40mn "AUT40Mn") | [1.0762](/materials/material-no/1.0762 "1.0762") | Free cutting steels | 0.4–0.48 | 20 | | [FC150](/materials/stas/fc150 "FC150") | [EN-JL1020](/materials/material-no/en-jl1020 "EN-JL1020") | Others | — | 22 | | [FC200](/materials/stas/fc200 "FC200") | [EN-JL1030](/materials/material-no/en-jl1030 "EN-JL1030") | Others | — | 22 | | [FC250](/materials/stas/fc250 "FC250") | [EN-JL1040](/materials/material-no/en-jl1040 "EN-JL1040") | Others | — | 22 | | [FC300](/materials/stas/fc300 "FC300") | [EN-JL1050](/materials/material-no/en-jl1050 "EN-JL1050") | Others | — | 22 | | [FC350](/materials/stas/fc350 "FC350") | [EN-JL1060](/materials/material-no/en-jl1060 "EN-JL1060") | Others | — | 21 | | [FGN70-3](/materials/stas/fgn70-3 "FGN70-3") | [EN-JS1102](/materials/material-no/en-js1102 "EN-JS1102") | Others | — | 21 | | [FGN70-3](/materials/stas/fgn70-3 "FGN70-3") | [EN-JS1103](/materials/material-no/en-js1103 "EN-JS1103") | Others | — | 21 | | [K410](/materials/stas/k410 "K410") | [1.0426](/materials/material-no/1.0426 "1.0426") | Aging resistant steels | 0.08–0.2 | 17 | | [K410](/materials/stas/k410 "K410") | [1.0425](/materials/material-no/1.0425 "1.0425") | Heat-resistant structural steels | ≤ 0.2 | 20 | | [K460](/materials/stas/k460 "K460") | [1.0481](/materials/material-no/1.0481 "1.0481") | Heat-resistant structural steels | 0.08–0.2 | 17 | | [K510](/materials/stas/k510 "K510") | [1.8902](/materials/material-no/1.8902 "1.8902") | Fine-grain structural steels | ≤ 0.2 | 19 | | [OB37](/materials/stas/ob37 "OB37") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 20 | | [OB37](/materials/stas/ob37 "OB37") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 19 | | [OCS355.5a](/materials/stas/ocs355-5a "OCS355.5a") | [1.0562](/materials/material-no/1.0562 "1.0562") | Fine-grain structural steels | ≤ 0.18 | 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/stas "Previous") Page 2 of 5[Next](/materials/stas/page/3 "Next")