--- title: "BS steel grades — 1547 designations — Page 11" 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/11 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/bs/page/11.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:be5d9f25914903c949f7e2cb857756c5da34e535cd7264f459dc8555d5b9dd74 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/bs/page/11 > Canonical URL: https://steelequivalents.com/materials/bs/page/11 > 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 11 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. Unless marked, every name here is an indicative cross-reference, not an asserted identity — the grades are close, not interchangeable. 1 of 50 rows differ and carry a “This grade’s own name” mark. ## Also known as 1547 designations | Grade | Material no. | Category | C% by weight | Also in other standards | |---|---|---|---|---| | [331S42](/materials/bs/331s42 "331S42") | [1.4873](/materials/material-no/1.4873 "1.4873") | Valve steels | 0.4–0.5 | 11 | | [3343](/materials/bs/3343 "3343") | [1.3343](/materials/material-no/1.3343 "1.3343") | High-speed steels | 0.86–0.94 | 19 | | [3355](/materials/bs/3355 "3355") | [1.3355](/materials/material-no/1.3355 "1.3355") | High-speed steels | 0.73–0.83 | 22 | | [34 CrMo 4](/materials/din-en/34crmo4 "34 CrMo 4") | — | — | — | 2 | | [34/20HR](/materials/bs/34-20hr "34/20HR") | [1.0034](/materials/material-no/1.0034 "1.0034") | Unalloyed structural steels | ≤ 0.15 | 12 | | [347 C 17](/materials/bs/347c17 "347 C 17") | [1.4552](/materials/material-no/1.4552 "1.4552") | Cast stainless steels | ≤ 0.07 | 7 | | [347 S 40](/materials/bs/347-s-40 "347 S 40") | [1.4550](/materials/material-no/1.4550 "1.4550") | Stainless steels | ≤ 0.08 | 15 | | [347 S 50](/materials/bs/347-s-50 "347 S 50") | [1.4550](/materials/material-no/1.4550 "1.4550") | Stainless steels | ≤ 0.08 | 15 | | [347 S 51](/materials/bs/347-s-51 "347 S 51") | [1.4550](/materials/material-no/1.4550 "1.4550") | Stainless steels | ≤ 0.08 | 15 | | [347 S 51](/materials/bs/347-s-51 "347 S 51") | [1.4961](/materials/material-no/1.4961 "1.4961") | High-temperature steels | 0.04–0.1 | 8 | | [347C17](/materials/bs/347c17 "347C17") | [1.4452](/materials/material-no/1.4452 "1.4452") | Others | ≤ 0.15 | 2 | | [347S17](/materials/bs/347s17 "347S17") | [1.4550](/materials/material-no/1.4550 "1.4550") | Stainless steels | ≤ 0.08 | 15 | | [347S17](/materials/bs/347s17 "347S17") | [1.4546](/materials/material-no/1.4546 "1.4546") | Special steels for aviation and aerospace | ≤ 0.08 | 5 | | [347S20](/materials/bs/347s20 "347S20") | [1.4550](/materials/material-no/1.4550 "1.4550") | Stainless steels | ≤ 0.08 | 15 | | [347S31](/materials/bs/347s31 "347S31") | [1.4550](/materials/material-no/1.4550 "1.4550") | Stainless steels | ≤ 0.08 | 15 | | [349 S 52](/materials/bs/349-s-52 "349 S 52") | [1.4871](/materials/material-no/1.4871 "1.4871") | Valve steels | 0.48–0.58 | 17 | | [349S54](/materials/bs/349s54 "349S54") | [1.4871](/materials/material-no/1.4871 "1.4871") | Valve steels | 0.48–0.58 | 17 | | [34Cr4](/materials/din-en/34cr4 "34Cr4") | [1.7033](/materials/material-no/1.7033 "1.7033") | Quenched and tempered steels | 0.3–0.37 | 18 | | [34CrMo4](/materials/din-en/34crmo4 "34CrMo4") | [1.7220](/materials/material-no/1.7220 "1.7220") | Quenched and tempered steels | 0.3–0.37 | 24 | | [34CrNiMo6](/materials/din-en/34crnimo6 "34CrNiMo6") | [1.6511](/materials/material-no/1.6511 "1.6511") | Quenched and tempered steels | 0.32–0.4 | 18 | | [34CrNiMo6](/materials/din-en/34crnimo6 "34CrNiMo6") | [1.6582](/materials/material-no/1.6582 "1.6582") | Quenched and tempered steels | 0.3–0.38 | 25 | | [350](/materials/bs/350 "350") | [EN-JL1060](/materials/material-no/en-jl1060 "EN-JL1060") | Others | — | 21 | | [350/22](/materials/bs/350-22 "350/22") | [EN-JL1060](/materials/material-no/en-jl1060 "EN-JL1060") | Others | — | 21 | | [355D](/materials/bs/355d "355D") | [1.8801](/materials/material-no/1.8801 "1.8801") | Others | ≤ 0.2 | 1 | | [355D](/materials/bs/355d "355D") | [1.8804](/materials/material-no/1.8804 "1.8804") | Others | ≤ 0.14 | 1 | | [355D](/materials/bs/355d "355D") | [1.8814](/materials/material-no/1.8814 "1.8814") | Others | ≤ 0.2 | 2 | | [355D](/materials/bs/355d "355D") | [1.8803](/materials/material-no/1.8803 "1.8803") | Others | ≤ 0.16 | 1 | | [355E](/materials/bs/355e "355E") | [1.8802](/materials/material-no/1.8802 "1.8802") | Others | ≤ 0.18 | 1 | | [355E](/materials/bs/355e "355E") | [1.8805](/materials/material-no/1.8805 "1.8805") | Others | ≤ 0.14 | 1 | | [355EM](/materials/bs/355em "355EM") | [1.8808](/materials/material-no/1.8808 "1.8808") | Others | ≤ 0.14 | 2 | | [355EM](/materials/bs/355em "355EM") | [1.8806](/materials/material-no/1.8806 "1.8806") | Others | ≤ 0.14 | 3 | | [355EMZ](/materials/bs/355emz "355EMZ") | [1.8810](/materials/material-no/1.8810 "1.8810") | Others | ≤ 0.14 | 3 | | [355EMZ](/materials/bs/355emz "355EMZ") | [1.8809](/materials/material-no/1.8809 "1.8809") | Others | ≤ 0.14 | 3 | | [362](/materials/bs/362 "362") | [1.6523](/materials/material-no/1.6523 "1.6523") | Case hardening steels | 0.17–0.23 | 18 | | [36A](/materials/bs/36a "36A") | [1.5752](/materials/material-no/1.5752 "1.5752") | Case hardening steels | 0.14–0.2 | 15 | | [36A](/materials/bs/36a "36A") | [1.5752](/materials/material-no/1.5752 "1.5752") | Case hardening steels | 0.14–0.2 | 15 | | [36C](/materials/bs/36c "36C") | [1.6657](/materials/material-no/1.6657 "1.6657") | Special steels for aviation and aerospace | 0.11–0.17 | 15 | | [36NiCrMo4](/materials/uni/36nicrmo4 "36NiCrMo4") | [1.6511](/materials/material-no/1.6511 "1.6511") | Quenched and tempered steels | 0.32–0.4 | 18 | | [37/23HR](/materials/bs/37-23hr "37/23HR") | [1.0038](/materials/material-no/1.0038 "1.0038") | Unalloyed structural steels | ≤ 0.17 | 26 | | [37/23HR](/materials/bs/37-23hr "37/23HR") | [1.0028](/materials/material-no/1.0028 "1.0028") | Unalloyed structural steels | ≤ 0.15 | 18 | | [37Cr4](/materials/din-en/37cr4 "37Cr4") | [1.7034](/materials/material-no/1.7034 "1.7034") | Quenched and tempered steels | 0.34–0.41 | 23 | | [38Cr2](/materials/din-en/38cr2 "38Cr2") | [1.1165](/materials/material-no/1.1165 "1.1165") | Quenched and tempered steels | 0.25–0.32 | 16 | | [394S17](/materials/bs/394s17 "394S17") | [1.4567](/materials/material-no/1.4567 "1.4567") | Stainless steels | ≤ 0.04 | 8 | | [394S17](/materials/bs/394s17 "394S17") | [1.4560](/materials/material-no/1.4560 "1.4560") | Others | ≤ 0.035 | 8 | | [3CR](/materials/bs/3cr "3CR") | [1.0333](/materials/material-no/1.0333 "1.0333") | Unalloyed structural steels | ≤ 0.08 | 4 | | [3CR](/materials/bs/3cr "3CR") | [1.0347](/materials/material-no/1.0347 "1.0347") | Unalloyed structural steels | ≤ 0.1 | 12 | | [3HR](/materials/bs/3hr "3HR") | [1.0338](/materials/material-no/1.0338 "1.0338") | Unalloyed structural steels | ≤ 0.08 | 18 | | [3HR](/materials/bs/3hr "3HR") | [1.0334](/materials/material-no/1.0334 "1.0334") | Unalloyed structural steels | ≤ 0.1 | 11 | | [3S.145](/materials/bs/3s-145 "3S.145") | [1.4546](/materials/material-no/1.4546 "1.4546") | Special steels for aviation and aerospace | ≤ 0.08 | 5 | | [3S132](/materials/bs/3s132 "3S132") This grade’s own name | [1.8523](/materials/material-no/1.8523 "1.8523") | Nitriding steels | 0.35–0.45 | 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. [Previous](/materials/bs/page/10 "Previous") Page 11 of 31[Next](/materials/bs/page/12 "Next")