--- title: "BS steel grades — 1547 designations — Page 19" 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/19 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/bs/page/19.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: sha256:6ecbf1c8e270b3e81807a0b6d68db56b97338cc5d83d30299a05640ff6ab0c52 generated: 2026-09-26 --- > **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/19 > Canonical URL: https://steelequivalents.com/materials/bs/page/19 > 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 19 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. 4 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 | |---|---|---|---|---| | [817A37](/materials/bs/817a37 "817A37") | [1.6565](/materials/material-no/1.6565 "1.6565") | Quenched and tempered steels | 0.35–0.45 | 15 | | [817M17](/materials/bs/817m17 "817M17") This grade’s own name | [1.6587](/materials/material-no/1.6587 "1.6587") | Case hardening steels | 0.15–0.21 | 15 | | [817M37](/materials/bs/817m37 "817M37") | [1.6511](/materials/material-no/1.6511 "1.6511") | Quenched and tempered steels | 0.32–0.4 | 18 | | [817M40](/materials/bs/817m40 "817M40") | [1.6582](/materials/material-no/1.6582 "1.6582") | Quenched and tempered steels | 0.3–0.38 | 25 | | [817M40](/materials/bs/817m40 "817M40") | [1.6511](/materials/material-no/1.6511 "1.6511") | Quenched and tempered steels | 0.32–0.4 | 18 | | [817M40](/materials/bs/817m40 "817M40") | [1.6562](/materials/material-no/1.6562 "1.6562") | Quenched and tempered steels | 0.37–0.44 | 10 | | [818 M 40](/materials/bs/818m40 "818 M 40") | [1.6565](/materials/material-no/1.6565 "1.6565") | Quenched and tempered steels | 0.35–0.45 | 15 | | [818M40](/materials/bs/818m40 "818M40") | [1.6511](/materials/material-no/1.6511 "1.6511") | Quenched and tempered steels | 0.32–0.4 | 18 | | [820A16](/materials/bs/820a16 "820A16") | [1.6587](/materials/material-no/1.6587 "1.6587") | Case hardening steels | 0.15–0.21 | 15 | | [821 grade Nb](/materials/bs/821-grade-nb "821 grade Nb") | [1.4552](/materials/material-no/1.4552 "1.4552") | Cast stainless steels | ≤ 0.07 | 7 | | [822A17](/materials/bs/822a17 "822A17") This grade’s own name | [1.6587](/materials/material-no/1.6587 "1.6587") | Case hardening steels | 0.15–0.21 | 15 | | [822M17](/materials/bs/822m17 "822M17") | [1.6587](/materials/material-no/1.6587 "1.6587") | Case hardening steels | 0.15–0.21 | 15 | | [822M17](/materials/bs/822m17 "822M17") | [1.6566](/materials/material-no/1.6566 "1.6566") | Case hardening steels | 0.14–0.2 | 7 | | [823M30](/materials/bs/823m30 "823M30") | [1.6580](/materials/material-no/1.6580 "1.6580") | Quenched and tempered steels | 0.26–0.34 | 15 | | [823M40](/materials/bs/823m40 "823M40") This grade’s own name | [1.6580](/materials/material-no/1.6580 "1.6580") | Quenched and tempered steels | 0.26–0.34 | 15 | | [826M31](/materials/bs/826m31 "826M31") | [1.6655](/materials/material-no/1.6655 "1.6655") | Special steels for aviation and aerospace | 0.29–0.36 | 4 | | [826M31](/materials/bs/826m31 "826M31") | [1.6743](/materials/material-no/1.6743 "1.6743") | Others | 0.28–0.36 | 4 | | [826M40](/materials/bs/826m40 "826M40") | — | — | — | — | | [826M40](/materials/bs/826m40 "826M40") | — | — | — | — | | [830M31](/materials/bs/830m31 "830M31") | [1.6746](/materials/material-no/1.6746 "1.6746") | Quenched and tempered steels | 0.28–0.36 | 3 | | [832 Nb](/materials/bs/832-nb "832 Nb") | [1.4961](/materials/material-no/1.4961 "1.4961") | High-temperature steels | 0.04–0.1 | 8 | | [832H13](/materials/bs/832h13 "832H13") | [1.6657](/materials/material-no/1.6657 "1.6657") | Special steels for aviation and aerospace | 0.11–0.17 | 15 | | [832M13](/materials/bs/832m13 "832M13") | [1.6657](/materials/material-no/1.6657 "1.6657") | Special steels for aviation and aerospace | 0.11–0.17 | 15 | | [835M15](/materials/bs/835m15 "835M15") | [1.6657](/materials/material-no/1.6657 "1.6657") | Special steels for aviation and aerospace | 0.11–0.17 | 15 | | [835M15](/materials/bs/835m15 "835M15") | [1.2764](/materials/material-no/1.2764 "1.2764") | Tool steels for cold work | 0.16–0.22 | 3 | | [835M30](/materials/bs/835m30 "835M30") | [1.6747](/materials/material-no/1.6747 "1.6747") | Quenched and tempered steels | 0.26–0.33 | 6 | | [835M30](/materials/bs/835m30 "835M30") | [1.6773](/materials/material-no/1.6773 "1.6773") | Quenched and tempered steels | 0.32–0.39 | 5 | | [845](/materials/bs/845 "845") | [1.4401](/materials/material-no/1.4401 "1.4401") | Stainless steels | ≤ 0.07 | 20 | | [845 B](/materials/bs/845-b "845 B") | [1.4432](/materials/material-no/1.4432 "1.4432") | Others | ≤ 0.03 | 11 | | [845 B](/materials/bs/845-b "845 B") | [1.4435](/materials/material-no/1.4435 "1.4435") | Stainless steels | ≤ 0.03 | 20 | | [845 grade B](/materials/bs/845-grade-b "845 grade B") | [1.4408](/materials/material-no/1.4408 "1.4408") | Cast stainless steels | ≤ 0.07 | 7 | | [845 grade Nb](/materials/bs/845-grade-nb "845 grade Nb") | [1.4581](/materials/material-no/1.4581 "1.4581") | Cast stainless steels | ≤ 0.07 | 9 | | [871M40](/materials/bs/871m40 "871M40") | [1.6546](/materials/material-no/1.6546 "1.6546") | Quenched and tempered steels | 0.37–0.44 | 14 | | [897M39](/materials/bs/897m39 "897M39") | [1.8523](/materials/material-no/1.8523 "1.8523") | Nitriding steels | 0.35–0.45 | 3 | | [8M](/materials/bs/8m "8M") | [1.0726](/materials/material-no/1.0726 "1.0726") | Free cutting steels | 0.32–0.39 | 15 | | [9 0.10C](/materials/bs/9-0-10c "9 0.10C") | — | — | — | 4 | | [90440](/materials/bs/90440 "90440") | [1.1133](/materials/material-no/1.1133 "1.1133") | Quenched and tempered steels | 0.17–0.23 | 20 | | [904S13](/materials/bs/904s13 "904S13") | [1.4539](/materials/material-no/1.4539 "1.4539") | Stainless steels | ≤ 0.02 | 10 | | [905M31](/materials/bs/905m31 "905M31") | [1.8507](/materials/material-no/1.8507 "1.8507") | Nitriding steels | 0.3–0.37 | 8 | | [905M39](/materials/bs/905m39 "905M39") This grade’s own name | [1.8509](/materials/material-no/1.8509 "1.8509") | Nitriding steels | 0.38–0.45 | 16 | | [905M39](/materials/bs/905m39 "905M39") | [1.8507](/materials/material-no/1.8507 "1.8507") | Nitriding steels | 0.3–0.37 | 8 | | [95CS](/materials/bs/95cs "95CS") | [1.1217](/materials/material-no/1.1217 "1.1217") | Others | 0.85–0.95 | 6 | | [95CS](/materials/bs/95cs "95CS") | [1.2018](/materials/material-no/1.2018 "1.2018") | Tool steels for cold work | 0.9–1 | 4 | | [95HS](/materials/bs/95hs "95HS") | [1.1217](/materials/material-no/1.1217 "1.1217") | Others | 0.85–0.95 | 6 | | [95HS](/materials/bs/95hs "95HS") | [1.2018](/materials/material-no/1.2018 "1.2018") | Tool steels for cold work | 0.9–1 | 4 | | [A12 EN 36A](/materials/bs/a12-en-36a "A12 EN 36A") | [1.5752](/materials/material-no/1.5752 "1.5752") | Case hardening steels | 0.14–0.2 | 15 | | [A12 EN 36A](/materials/bs/a12-en-36a "A12 EN 36A") | [1.5752](/materials/material-no/1.5752 "1.5752") | Case hardening steels | 0.14–0.2 | 15 | | [A2](/materials/din-en/a2 "A2") | [1.0552](/materials/material-no/1.0552 "1.0552") | Others | ≤ 0.25 | 13 | | [A5](/materials/bs/a5 "A5") | [1.1165](/materials/material-no/1.1165 "1.1165") | Quenched and tempered steels | 0.25–0.32 | 16 | | [A6](/materials/bs/a6 "A6") | [1.1165](/materials/material-no/1.1165 "1.1165") | Quenched and tempered steels | 0.25–0.32 | 16 | **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/18 "Previous") Page 19 of 31[Next](/materials/bs/page/20 "Next")