--- title: "BS steel grades — 1547 designations — Page 13" description: "Steel grades designated under BS, with chemical composition, mechanical properties and equivalents in other standards. 1547 designations across 549…" canonical: https://steelequivalents.com/materials/bs/page/13 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/bs/page/13.md cs: https://steelequivalents.com/cs/materiály/bs.md de: https://steelequivalents.com/de/werkstoffe/bs.md es: https://steelequivalents.com/es/materiales/bs.md fr: https://steelequivalents.com/fr/matériaux/bs.md hu: https://steelequivalents.com/hu/anyagok/bs.md it: https://steelequivalents.com/it/materiali/bs.md nl: https://steelequivalents.com/nl/materialen/bs.md pl: https://steelequivalents.com/pl/materiały/bs.md pt: https://steelequivalents.com/pt/materiais/bs.md ru: https://steelequivalents.com/ru/материалы/bs.md tr: https://steelequivalents.com/tr/malzemeler/bs.md zh: https://steelequivalents.com/zh/材料/bs.md ja: https://steelequivalents.com/ja/材料/bs.md ar: https://steelequivalents.com/ar/المواد/bs.md ko: https://steelequivalents.com/ko/재료/bs.md pt-br: https://steelequivalents.com/pt-br/materiais/bs.md hi: https://steelequivalents.com/hi/सामग्री/bs.md content_hash: sha256:e476a36c446fdac9124b12be971199aa6ce824bc93400f46dcd243ec8bc67ff7 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/bs/page/13 > Canonical URL: https://steelequivalents.com/materials/bs/page/13 > 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. BS · 1,547 grades # BS steel grades — 1547 designations — Page 13 Every grade designated under BS, 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 1547 designations | Grade | Material no. | Category | C% by weight | Also in other standards | |---|---|---|---|---| | [420-12](/materials/bs/420-12 "420-12") | [EN-JS1073](/materials/material-no/en-js1073 "EN-JS1073") | Others | — | 17 | | [420C24](/materials/bs/420c24 "420C24") | [1.4027](/materials/material-no/1.4027 "1.4027") | Cast stainless steels | 0.16–0.23 | 14 | | [420C29](/materials/bs/420c29 "420C29") | [1.4027](/materials/material-no/1.4027 "1.4027") | Cast stainless steels | 0.16–0.23 | 14 | | [420S29](/materials/bs/420s29 "420S29") | [1.4021](/materials/material-no/1.4021 "1.4021") | Stainless steels | 0.16–0.25 | 18 | | [420S37](/materials/bs/420s37 "420S37") | [1.4028](/materials/material-no/1.4028 "1.4028") | Stainless steels | 0.26–0.35 | 18 | | [420S37](/materials/bs/420s37 "420S37") | [1.4021](/materials/material-no/1.4021 "1.4021") | Stainless steels | 0.16–0.25 | 18 | | [420S37](/materials/bs/420s37 "420S37") | [1.4006](/materials/material-no/1.4006 "1.4006") | Stainless steels | 0.08–0.15 | 26 | | [420S37](/materials/bs/420s37 "420S37") | [1.2083](/materials/material-no/1.2083 "1.2083") | Tool steels for cold work | 0.36–0.42 | 16 | | [420S45](/materials/bs/420s45 "420S45") | [1.4031](/materials/material-no/1.4031 "1.4031") | Stainless steels | 0.36–0.42 | 18 | | [420S45](/materials/bs/420s45 "420S45") | [1.4034](/materials/material-no/1.4034 "1.4034") | Stainless steels | 0.43–0.5 | 18 | | [420S45](/materials/bs/420s45 "420S45") | [1.4029](/materials/material-no/1.4029 "1.4029") | Stainless steels | 0.25–0.32 | 10 | | [420S45 EN 56D](/materials/bs/420-s-45-en56d "420S45 EN 56D") | [1.4034](/materials/material-no/1.4034 "1.4034") | Stainless steels | 0.43–0.5 | 18 | | [425 C 11](/materials/bs/425c11 "425 C 11") | [1.4317](/materials/material-no/1.4317 "1.4317") | Cast stainless steels | ≤ 0.06 | 4 | | [425 C 12](/materials/bs/425-c-12 "425 C 12") | [1.4317](/materials/material-no/1.4317 "1.4317") | Cast stainless steels | ≤ 0.06 | 4 | | [425C11](/materials/bs/425c11 "425C11") | [1.4313](/materials/material-no/1.4313 "1.4313") | Stainless steels | ≤ 0.05 | 8 | | [42CrMO4](/materials/din-en/42crmo4 "42CrMO4") | [1.7223](/materials/material-no/1.7223 "1.7223") | Steels for surface hardening | 0.38–0.44 | 13 | | [42CrMO4](/materials/din-en/42crmo4 "42CrMO4") | [1.7225](/materials/material-no/1.7225 "1.7225") | Quenched and tempered steels | 0.38–0.45 | 25 | | [43/25HR](/materials/bs/43-25hr "43/25HR") | [1.0040](/materials/material-no/1.0040 "1.0040") | Unalloyed structural steels | ≤ 0.25 | 8 | | [43/25HS](/materials/bs/43-25hs "43/25HS") | [1.0040](/materials/material-no/1.0040 "1.0040") | Unalloyed structural steels | ≤ 0.25 | 8 | | [43/35](/materials/bs/43-35 "43/35") | [1.0977](/materials/material-no/1.0977 "1.0977") | Fine-grain steels for cold forming | ≤ 0.18 | 1 | | [43/35HS](/materials/bs/43-35hs "43/35HS") | [1.0050](/materials/material-no/1.0050 "1.0050") | Unalloyed structural steels | — | 23 | | [43/35HS](/materials/bs/43-35hs "43/35HS") | [1.0050](/materials/material-no/1.0050 "1.0050") | Unalloyed structural steels | — | 23 | | [430](/materials/aisi-sae/430 "430") | [1.0402](/materials/material-no/1.0402 "1.0402") | Quenched and tempered steels | 0.17–0.24 | 24 | | [430A](/materials/bs/430a "430A") | [1.0443](/materials/material-no/1.0443 "1.0443") | Others | ≤ 0.11 | 13 | | [430LT](/materials/bs/430lt "430LT") | [1.0481](/materials/material-no/1.0481 "1.0481") | Heat-resistant structural steels | 0.08–0.2 | 17 | | [430LT](/materials/bs/430lt "430LT") | [1.0436](/materials/material-no/1.0436 "1.0436") | Fine-grain structural steels | 0.15–0.2 | 14 | | [430S1](/materials/bs/430s1 "430S1") | [1.4016](/materials/material-no/1.4016 "1.4016") | Stainless steels | ≤ 0.08 | 18 | | [430S15](/materials/bs/430s15 "430S15") | [1.4016](/materials/material-no/1.4016 "1.4016") | Stainless steels | ≤ 0.08 | 18 | | [430S15](/materials/bs/430s15 "430S15") | [1.4742](/materials/material-no/1.4742 "1.4742") | Heat resistant steels | ≤ 0.12 | 17 | | [430S17](/materials/bs/430s17 "430S17") | [1.4016](/materials/material-no/1.4016 "1.4016") | Stainless steels | ≤ 0.08 | 18 | | [430S18](/materials/bs/430s18 "430S18") | [1.4016](/materials/material-no/1.4016 "1.4016") | Stainless steels | ≤ 0.08 | 18 | | [431 S 29 En57](/materials/bs/431-s-29-en57 "431 S 29 En57") | [1.4057](/materials/material-no/1.4057 "1.4057") | Stainless steels | 0.12–0.22 | 17 | | [431S29](/materials/bs/431s29 "431S29") | [1.4057](/materials/material-no/1.4057 "1.4057") | Stainless steels | 0.12–0.22 | 17 | | [431S29](/materials/bs/431s29 "431S29") | [1.4044](/materials/material-no/1.4044 "1.4044") | Special steels for aviation and aerospace | 0.12–0.2 | 8 | | [434S17](/materials/bs/434s17 "434S17") | [1.4113](/materials/material-no/1.4113 "1.4113") | Stainless steels | ≤ 0.08 | 10 | | [4360 40 C](/materials/bs/4360-40c "4360 40 C") | [1.0038](/materials/material-no/1.0038 "1.0038") | Unalloyed structural steels | ≤ 0.17 | 26 | | [4360 43 C](/materials/bs/4360-43c "4360 43 C") | [1.0144](/materials/material-no/1.0144 "1.0144") | Unalloyed structural steels | ≤ 0.18 | 22 | | [4360 50 B](/materials/bs/4360-50b "4360 50 B") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 22 | | [4360 50 B](/materials/bs/4360-50b "4360 50 B") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 20 | | [4360 55 E](/materials/bs/4360-55e "4360 55 E") | [1.8900](/materials/material-no/1.8900 "1.8900") | Fine-grain structural steels | ≤ 0.2 | 4 | | [4360-40B](/materials/bs/4360-40b "4360-40B") | [1.0038](/materials/material-no/1.0038 "1.0038") | Unalloyed structural steels | ≤ 0.17 | 26 | | [4360-40B](/materials/bs/4360-40b "4360-40B") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 20 | | [4360-40B](/materials/bs/4360-40b "4360-40B") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 19 | | [4360-40C](/materials/bs/4360-40c "4360-40C") | [1.0116](/materials/material-no/1.0116 "1.0116") | Unalloyed structural steels | ≤ 0.17 | 12 | | [4360-40D](/materials/bs/4360-40d "4360-40D") | [1.0038](/materials/material-no/1.0038 "1.0038") | Unalloyed structural steels | ≤ 0.17 | 26 | | [4360-40D](/materials/bs/4360-40d "4360-40D") | [1.0028](/materials/material-no/1.0028 "1.0028") | Unalloyed structural steels | ≤ 0.15 | 18 | | [4360-43B](/materials/bs/4360-43b "4360-43B") | [1.0044](/materials/material-no/1.0044 "1.0044") | Unalloyed structural steels | ≤ 0.21 | 26 | | [4360-43C](/materials/bs/4360-43c "4360-43C") | [1.0044](/materials/material-no/1.0044 "1.0044") | Unalloyed structural steels | ≤ 0.21 | 26 | | [4360-50B](/materials/bs/4360-50b "4360-50B") | [1.0050](/materials/material-no/1.0050 "1.0050") | Unalloyed structural steels | — | 23 | | [4360-50B](/materials/bs/4360-50b "4360-50B") | [1.0050](/materials/material-no/1.0050 "1.0050") | Unalloyed structural steels | — | 23 | **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/bs/page/12 "Previous") Page 13 of 31[Next](/materials/bs/page/14 "Next")