--- title: "STN steel grades — 184 designations" description: "Steel grades designated under STN, with chemical composition, mechanical properties and equivalents in other standards. 184 designations across 178…" canonical: https://steelequivalents.com/materials/stn language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/stn.md cs: https://steelequivalents.com/cs/materiály/stn.md de: https://steelequivalents.com/de/werkstoffe/stn.md es: https://steelequivalents.com/es/materiales/stn.md fr: https://steelequivalents.com/fr/matériaux/stn.md hu: https://steelequivalents.com/hu/anyagok/stn.md it: https://steelequivalents.com/it/materiali/stn.md nl: https://steelequivalents.com/nl/materialen/stn.md pl: https://steelequivalents.com/pl/materiały/stn.md pt: https://steelequivalents.com/pt/materiais/stn.md ru: https://steelequivalents.com/ru/материалы/stn.md tr: https://steelequivalents.com/tr/malzemeler/stn.md zh: https://steelequivalents.com/zh/材料/stn.md ja: https://steelequivalents.com/ja/材料/stn.md ar: https://steelequivalents.com/ar/المواد/stn.md ko: https://steelequivalents.com/ko/재료/stn.md pt-br: https://steelequivalents.com/pt-br/materiais/stn.md hi: https://steelequivalents.com/hi/सामग्री/stn.md content_hash: sha256:2fa7c2f55f9593236d9dd839d3dcd0092371663a47a505cfcce6b3f6214914b3 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/stn > Canonical URL: https://steelequivalents.com/materials/stn > 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. STN · 184 grades # STN steel grades — 184 designations Every grade designated under STN, 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 184 designations | Grade | Material no. | Category | C% by weight | Also in other standards | |---|---|---|---|---| | [10 000](/materials/csn/10000 "10 000") | [1.0035](/materials/material-no/1.0035 "1.0035") | Unalloyed structural steels | — | 22 | | [10 004](/materials/csn/10004 "10 004") | [1.0035](/materials/material-no/1.0035 "1.0035") | Unalloyed structural steels | — | 22 | | [11 109](/materials/csn/11109 "11 109") | [1.0715](/materials/material-no/1.0715 "1.0715") | Free cutting steels | ≤ 0.14 | 14 | | [11 110](/materials/csn/11110 "11 110") | [1.0721](/materials/material-no/1.0721 "1.0721") | Free cutting steels | 0.07–0.13 | 15 | | [11 120](/materials/csn/11120 "11 120") | [1.0725](/materials/material-no/1.0725 "1.0725") | Free cutting steels | 0.12–0.18 | 5 | | [11 140](/materials/csn/11140 "11 140") | [1.0726](/materials/material-no/1.0726 "1.0726") | Free cutting steels | 0.32–0.39 | 15 | | [11 301](/materials/csn/11301 "11 301") | [1.0347](/materials/material-no/1.0347 "1.0347") | Unalloyed structural steels | ≤ 0.1 | 12 | | [11 305](/materials/csn/11305 "11 305") | [1.0338](/materials/material-no/1.0338 "1.0338") | Unalloyed structural steels | ≤ 0.08 | 18 | | [11 321](/materials/csn/11321 "11 321") | [1.0330](/materials/material-no/1.0330 "1.0330") | Unalloyed structural steels | ≤ 0.12 | 17 | | [11 343](/materials/csn/11343 "11 343") | [1.0026](/materials/material-no/1.0026 "1.0026") | Unalloyed structural steels | ≤ 0.2 | 2 | | [11 368](/materials/csn/11368 "11 368") | [1.0345](/materials/material-no/1.0345 "1.0345") | Heat-resistant structural steels | ≤ 0.16 | 18 | | [11 373](/materials/csn/11373 "11 373") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 20 | | [11 373](/materials/csn/11373 "11 373") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 19 | | [11 375](/materials/csn/11375 "11 375") | [1.0038](/materials/material-no/1.0038 "1.0038") | Unalloyed structural steels | ≤ 0.17 | 26 | | [11 375](/materials/csn/11375 "11 375") | [1.0039](/materials/material-no/1.0039 "1.0039") | Unalloyed structural steels | ≤ 0.17 | 3 | | [11 375](/materials/csn/11375 "11 375") | [1.0120](/materials/material-no/1.0120 "1.0120") | Unalloyed structural steels | ≤ 0.17 | 1 | | [11 378](/materials/csn/11378 "11 378") | [1.0114](/materials/material-no/1.0114 "1.0114") | Unalloyed structural steels | ≤ 0.17 | 21 | | [11 418](/materials/csn/11418 "11 418") | [1.0425](/materials/material-no/1.0425 "1.0425") | Heat-resistant structural steels | ≤ 0.2 | 20 | | [11 443](/materials/csn/11443 "11 443") | [1.0044](/materials/material-no/1.0044 "1.0044") | Unalloyed structural steels | ≤ 0.21 | 26 | | [11 443](/materials/csn/11443 "11 443") | [1.0149](/materials/material-no/1.0149 "1.0149") | Unalloyed structural steels | ≤ 0.2 | 2 | | [11 443](/materials/csn/11443 "11 443") | [1.0128](/materials/material-no/1.0128 "1.0128") | Unalloyed structural steels | ≤ 0.21 | 5 | | [11 448](/materials/csn/11448 "11 448") | [1.0145](/materials/material-no/1.0145 "1.0145") | Unalloyed structural steels | ≤ 0.18 | 8 | | [11 448](/materials/csn/11448 "11 448") | [1.0138](/materials/material-no/1.0138 "1.0138") | Unalloyed structural steels | ≤ 0.2 | 2 | | [11 500](/materials/csn/11500 "11 500") | [1.0050](/materials/material-no/1.0050 "1.0050") | Unalloyed structural steels | — | 23 | | [11 500](/materials/csn/11500 "11 500") | [1.0050](/materials/material-no/1.0050 "1.0050") | Unalloyed structural steels | — | 23 | | [11 503](/materials/csn/11503 "11 503") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 22 | | [11 503](/materials/csn/11503 "11 503") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 20 | | [11 503](/materials/csn/11503 "11 503") | [1.0577](/materials/material-no/1.0577 "1.0577") | Unalloyed structural steels | ≤ 0.2 | 11 | | [11 503](/materials/csn/11503 "11 503") | [1.0576](/materials/material-no/1.0576 "1.0576") | Fine-grain structural steels | ≤ 0.22 | 3 | | [11 523](/materials/csn/11523 "11 523") | [1.0553](/materials/material-no/1.0553 "1.0553") | Unalloyed structural steels | ≤ 0.2 | 20 | | [11 523](/materials/csn/11523 "11 523") | [1.0547](/materials/material-no/1.0547 "1.0547") | Others | ≤ 0.22 | 4 | | [11 523](/materials/csn/11523 "11 523") | [1.0554](/materials/material-no/1.0554 "1.0554") | Unalloyed structural steels | ≤ 0.2 | 8 | | [11 600](/materials/csn/11600 "11 600") | [1.0060](/materials/material-no/1.0060 "1.0060") | Unalloyed structural steels | — | 21 | | [11 600](/materials/csn/11600 "11 600") | [1.0060](/materials/material-no/1.0060 "1.0060") | Unalloyed structural steels | — | 21 | | [11 700](/materials/csn/11700 "11 700") | [1.0070](/materials/material-no/1.0070 "1.0070") | Unalloyed structural steels | — | 16 | | [11 700](/materials/csn/11700 "11 700") | [1.0070](/materials/material-no/1.0070 "1.0070") | Unalloyed structural steels | — | 16 | | [12 010](/materials/csn/12010 "12 010") | [1.1121](/materials/material-no/1.1121 "1.1121") | Case hardening steels | 0.07–0.13 | 22 | | [12 020](/materials/csn/12020 "12 020") | [1.1148](/materials/material-no/1.1148 "1.1148") | Case hardening steels | 0.12–0.18 | 7 | | [12 023](/materials/csn/12023 "12 023") | [1.1141](/materials/material-no/1.1141 "1.1141") | Case hardening steels | 0.12–0.18 | 20 | | [12 024](/materials/csn/12024 "12 024") | [1.1151](/materials/material-no/1.1151 "1.1151") | Quenched and tempered steels | 0.17–0.24 | 15 | | [12 024](/materials/csn/12024 "12 024") | [1.0402](/materials/material-no/1.0402 "1.0402") | Quenched and tempered steels | 0.17–0.24 | 24 | | [12 030](/materials/csn/12030 "12 030") | [1.1158](/materials/material-no/1.1158 "1.1158") | Quenched and tempered steels | 0.22–0.29 | 12 | | [12 030](/materials/csn/12030 "12 030") | [1.0406](/materials/material-no/1.0406 "1.0406") | Quenched and tempered steels | 0.22–0.29 | 20 | | [12 031](/materials/csn/12031 "12 031") | [1.1178](/materials/material-no/1.1178 "1.1178") | Quenched and tempered steels | 0.27–0.34 | 13 | | [12 031](/materials/csn/12031 "12 031") | [1.0528](/materials/material-no/1.0528 "1.0528") | Quenched and tempered steels | 0.27–0.34 | 14 | | [12 040](/materials/csn/12040 "12 040") | [1.1181](/materials/material-no/1.1181 "1.1181") | Quenched and tempered steels | 0.32–0.39 | 20 | | [12 040](/materials/csn/12040 "12 040") | [1.0501](/materials/material-no/1.0501 "1.0501") | Quenched and tempered steels | 0.32–0.39 | 23 | | [12 041](/materials/csn/12041 "12 041") | [1.1186](/materials/material-no/1.1186 "1.1186") | Quenched and tempered steels | 0.37–0.44 | 16 | | [12 041](/materials/csn/12041 "12 041") | [1.0511](/materials/material-no/1.0511 "1.0511") | Quenched and tempered steels | 0.37–0.44 | 21 | | [12 042](/materials/csn/12042 "12 042") | [1.5511](/materials/material-no/1.5511 "1.5511") | Others | 0.32–0.39 | 3 | **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. Page 1 of 4[Next](/materials/stn/page/2 "Next")