--- title: "BS steel grades — 1547 designations — Page 18" 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/18 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/bs/page/18.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: sha256:18adfd183ce3b0933f749da4a942f26a7523472544f4e8cf56031b547b3eb42f 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/18 > Canonical URL: https://steelequivalents.com/materials/bs/page/18 > 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 18 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 | |---|---|---|---|---| | [708M20](/materials/bs/708m20 "708M20") | [1.7218](/materials/material-no/1.7218 "1.7218") | Quenched and tempered steels | 0.22–0.29 | 25 | | [708M20](/materials/bs/708m20 "708M20") | [1.3566](/materials/material-no/1.3566 "1.3566") | Others | 0.12–0.18 | 8 | | [708M25](/materials/bs/708m25 "708M25") | [1.7218](/materials/material-no/1.7218 "1.7218") | Quenched and tempered steels | 0.22–0.29 | 25 | | [708M32](/materials/bs/708m32 "708M32") This grade’s own name | [1.7226](/materials/material-no/1.7226 "1.7226") | Others | 0.3–0.37 | 9 | | [708M32](/materials/bs/708m32 "708M32") | [1.7220](/materials/material-no/1.7220 "1.7220") | Quenched and tempered steels | 0.3–0.37 | 24 | | [708M40](/materials/bs/708m40 "708M40") This grade’s own name | [1.7225](/materials/material-no/1.7225 "1.7225") | Quenched and tempered steels | 0.38–0.45 | 25 | | [708M40](/materials/bs/708m40 "708M40") | [1.7228](/materials/material-no/1.7228 "1.7228") | Quenched and tempered steels | 0.46–0.54 | 12 | | [708M40](/materials/bs/708m40 "708M40") | [1.7223](/materials/material-no/1.7223 "1.7223") | Steels for surface hardening | 0.38–0.44 | 13 | | [708M40](/materials/bs/708m40 "708M40") | [1.6511](/materials/material-no/1.6511 "1.6511") | Quenched and tempered steels | 0.32–0.4 | 18 | | [708M40](/materials/bs/708m40 "708M40") | [1.7227](/materials/material-no/1.7227 "1.7227") | Quenched and tempered steels | 0.38–0.45 | 15 | | [708M40](/materials/bs/708m40 "708M40") | [1.2330](/materials/material-no/1.2330 "1.2330") | Others | 0.32–0.37 | 8 | | [708M40 / 42CrMo4](/materials/bs/708m40-42crmo4 "708M40 / 42CrMo4") | [1.7225](/materials/material-no/1.7225 "1.7225") | Quenched and tempered steels | 0.38–0.45 | 25 | | [708M40 EN 19A](/materials/bs/708m40-en-19a "708M40 EN 19A") | [1.7225](/materials/material-no/1.7225 "1.7225") | Quenched and tempered steels | 0.38–0.45 | 25 | | [708M50](/materials/bs/708m50 "708M50") | [1.7228](/materials/material-no/1.7228 "1.7228") | Quenched and tempered steels | 0.46–0.54 | 12 | | [709M40](/materials/bs/709m40 "709M40") | [1.7225](/materials/material-no/1.7225 "1.7225") | Quenched and tempered steels | 0.38–0.45 | 25 | | [709M40](/materials/bs/709m40 "709M40") | [1.7227](/materials/material-no/1.7227 "1.7227") | Quenched and tempered steels | 0.38–0.45 | 15 | | [722M24](/materials/bs/722m24 "722M24") | [1.8515](/materials/material-no/1.8515 "1.8515") | Nitriding steels | 0.28–0.35 | 8 | | [722M24](/materials/bs/722m24 "722M24") | [1.7361](/materials/material-no/1.7361 "1.7361") | Quenched and tempered steels | 0.28–0.35 | 7 | | [722M24](/materials/bs/722m24 "722M24") | [1.0038](/materials/material-no/1.0038 "1.0038") | Unalloyed structural steels | ≤ 0.17 | 26 | | [725LN](/materials/bs/725ln "725LN") | [1.4466](/materials/material-no/1.4466 "1.4466") | Stainless steels | ≤ 0.02 | 6 | | [735A30](/materials/bs/735a30 "735A30") | [1.2241](/materials/material-no/1.2241 "1.2241") | Tool steels for cold work | 0.47–0.55 | 9 | | [735A30](/materials/bs/735a30 "735A30") | [1.8159](/materials/material-no/1.8159 "1.8159") | Quenched and tempered steels | 0.47–0.55 | 27 | | [735A50](/materials/bs/735a50 "735A50") | [1.8159](/materials/material-no/1.8159 "1.8159") | Quenched and tempered steels | 0.47–0.55 | 27 | | [735A50 przybliż.](/materials/bs/735a50-przybliz "735A50 przybliż.") | [1.2235](/materials/material-no/1.2235 "1.2235") | Tool steels for cold work | 0.75–0.85 | 13 | | [735A51](/materials/bs/735a51 "735A51") | [1.8159](/materials/material-no/1.8159 "1.8159") | Quenched and tempered steels | 0.47–0.55 | 27 | | [735A54](/materials/bs/735a54 "735A54") | [1.8159](/materials/material-no/1.8159 "1.8159") | Quenched and tempered steels | 0.47–0.55 | 27 | | [735h51](/materials/bs/735h51 "735h51") | [1.8159](/materials/material-no/1.8159 "1.8159") | Quenched and tempered steels | 0.47–0.55 | 27 | | [736B](/materials/bs/736b "736B") | [2.4631](/materials/material-no/2.4631 "2.4631") | High-temperature steels / aviation variant | 0.04–0.1 | 5 | | [738M32](/materials/bs/738m32 "738M32") This grade’s own name | [1.7220](/materials/material-no/1.7220 "1.7220") | Quenched and tempered steels | 0.3–0.37 | 24 | | [75Cr1](/materials/din-en/75cr1 "75Cr1") | [1.2003](/materials/material-no/1.2003 "1.2003") | Tool steels for cold work | 0.7–0.8 | 9 | | [75F70](/materials/bs/75f70 "75F70") | [1.8974](/materials/material-no/1.8974 "1.8974") | Fine-grain steels for cold forming | ≤ 0.12 | 3 | | [762](/materials/bs/762 "762") | [1.4923](/materials/material-no/1.4923 "1.4923") | High-temperature steels | 0.18–0.24 | 5 | | [7S1](/materials/bs/7s1 "7S1") This grade’s own name | — | — | — | — | | [7S80](/materials/bs/7s80 "7S80") | [1.4044](/materials/material-no/1.4044 "1.4044") | Special steels for aviation and aerospace | 0.12–0.2 | 8 | | [7S80](/materials/bs/7s80 "7S80") | [1.4057](/materials/material-no/1.4057 "1.4057") | Stainless steels | 0.12–0.22 | 17 | | [800/2](/materials/bs/800-2 "800/2") | [EN-JS1080](/materials/material-no/en-js1080 "EN-JS1080") | Others | — | 16 | | [801](/materials/bs/801 "801") | [1.4301](/materials/material-no/1.4301 "1.4301") | Stainless steels | ≤ 0.07 | 23 | | [801 grade A](/materials/bs/801-grade-a "801 grade A") | [1.4948](/materials/material-no/1.4948 "1.4948") | High-temperature steels | 0.04–0.08 | 8 | | [805H17](/materials/bs/805h17 "805H17") | [1.6523](/materials/material-no/1.6523 "1.6523") | Case hardening steels | 0.17–0.23 | 18 | | [805H20](/materials/bs/805h20 "805H20") | [1.6523](/materials/material-no/1.6523 "1.6523") | Case hardening steels | 0.17–0.23 | 18 | | [805H22](/materials/bs/805h22 "805H22") | [1.6523](/materials/material-no/1.6523 "1.6523") | Case hardening steels | 0.17–0.23 | 18 | | [805M20](/materials/bs/805m20 "805M20") | [1.6523](/materials/material-no/1.6523 "1.6523") | Case hardening steels | 0.17–0.23 | 18 | | [806M20](/materials/bs/806m20 "806M20") | [1.6523](/materials/material-no/1.6523 "1.6523") | Case hardening steels | 0.17–0.23 | 18 | | [80CS](/materials/bs/80cs "80CS") | [1.1269](/materials/material-no/1.1269 "1.1269") | Spring steels | 0.8–0.9 | 14 | | [80HS](/materials/bs/80hs "80HS") | [1.1269](/materials/material-no/1.1269 "1.1269") | Spring steels | 0.8–0.9 | 14 | | [815M17](/materials/bs/815m17 "815M17") | [1.6566](/materials/material-no/1.6566 "1.6566") | Case hardening steels | 0.14–0.2 | 7 | | [816M40](/materials/bs/816m40 "816M40") | [1.6511](/materials/material-no/1.6511 "1.6511") | Quenched and tempered steels | 0.32–0.4 | 18 | | [816M40](/materials/bs/816m40 "816M40") | [1.6510](/materials/material-no/1.6510 "1.6510") | Others | 0.35–0.43 | 7 | | [816M40](/materials/bs/816m40 "816M40") | [1.6582](/materials/material-no/1.6582 "1.6582") | Quenched and tempered steels | 0.3–0.38 | 25 | | [817A37](/materials/bs/817a37 "817A37") | [1.6511](/materials/material-no/1.6511 "1.6511") | Quenched and tempered steels | 0.32–0.4 | 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/bs/page/17 "Previous") Page 18 of 31[Next](/materials/bs/page/19 "Next")