--- title: "BS steel grades — 1547 designations — Page 21" 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/21 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/bs/page/21.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:fc447c9f36050bff6dd2926e1891f0c38e243361676c3b0113ba5cb74b5fd01f 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/21 > Canonical URL: https://steelequivalents.com/materials/bs/page/21 > 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 21 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 | |---|---|---|---|---| | [BS 1449 1 HR](/materials/bs/bs-1449-1-hr "BS 1449 1 HR") | [1.0050](/materials/material-no/1.0050 "1.0050") | Unalloyed structural steels | — | 23 | | [BS 1449 1 HR](/materials/bs/bs-1449-1-hr "BS 1449 1 HR") | [1.0050](/materials/material-no/1.0050 "1.0050") | Unalloyed structural steels | — | 23 | | [BS1](/materials/bs/bs1 "BS1") | [1.2550](/materials/material-no/1.2550 "1.2550") | Tool steels for cold work | 0.55–0.65 | 15 | | [BS1](/materials/bs/bs1 "BS1") | [1.2542](/materials/material-no/1.2542 "1.2542") | Tool steels for cold work | 0.4–0.5 | 12 | | [BS1](/materials/bs/bs1 "BS1") | — | — | 0.35–0.45 | 5 | | [BS1501 Gr 503](/materials/bs/bs1501-gr-503 "BS1501 Gr 503") | [1.5637](/materials/material-no/1.5637 "1.5637") | Low-temperature structural steels | ≤ 0.15 | 11 | | [BS1501 Gr 503](/materials/bs/bs1501-gr-503 "BS1501 Gr 503") | [1.5639](/materials/material-no/1.5639 "1.5639") | Low-temperature structural steels | 0.12–0.19 | 9 | | [BS2901 grade NA51](/materials/bs/bs2901-grade-na51 "BS2901 grade NA51") | [2.4668](/materials/material-no/2.4668 "2.4668") | High-temperature steels | 0.02–0.08 | 10 | | [BS2901 NA49](/materials/bs/bs2901-na49 "BS2901 NA49") | [2.4851](/materials/material-no/2.4851 "2.4851") | Heat resistant steels | 0.03–0.1 | 7 | | [BS3603 gr. 503LT](/materials/bs/bs3603-gr-503lt "BS3603 gr. 503LT") | [1.5637](/materials/material-no/1.5637 "1.5637") | Low-temperature structural steels | ≤ 0.15 | 11 | | [BS3603 gr. 503LT](/materials/bs/bs3603-gr-503lt "BS3603 gr. 503LT") | [1.5639](/materials/material-no/1.5639 "1.5639") | Low-temperature structural steels | 0.12–0.19 | 9 | | [BS410S21](/materials/bs/bs410s21 "BS410S21") This grade’s own name | [1.4006](/materials/material-no/1.4006 "1.4006") | Stainless steels | 0.08–0.15 | 26 | | [BT1](/materials/bs/bt1 "BT1") | [1.3355](/materials/material-no/1.3355 "1.3355") | High-speed steels | 0.73–0.83 | 22 | | [BT15](/materials/bs/bt15 "BT15") | [1.3202](/materials/material-no/1.3202 "1.3202") | High-speed steels | 1.3–1.45 | 12 | | [BT4](/materials/bs/bt4 "BT4") | [1.3255](/materials/material-no/1.3255 "1.3255") | High-speed steels | 0.75–0.83 | 14 | | [BT42](/materials/bs/bt42 "BT42") | [1.3207](/materials/material-no/1.3207 "1.3207") | High-speed steels | 1.2–1.35 | 14 | | [BT42](/materials/bs/bt42 "BT42") | [1.3247](/materials/material-no/1.3247 "1.3247") | High-speed steels | 1.05–1.15 | 14 | | [BT5](/materials/bs/bt5 "BT5") | [1.3265](/materials/material-no/1.3265 "1.3265") | High-speed steels | 0.72–0.8 | 6 | | [BW 10](/materials/bs/bw10 "BW 10") | [1.3402](/materials/material-no/1.3402 "1.3402") | Others | 1–1.25 | 4 | | [BW 10](/materials/bs/bw10 "BW 10") | [1.3406](/materials/material-no/1.3406 "1.3406") | Others | 0.9–1.05 | 4 | | [BW 10](/materials/bs/bw10 "BW 10") | [1.3802](/materials/material-no/1.3802 "1.3802") | Non-magnetic steels | 1.1–1.3 | 6 | | [BW 10](/materials/bs/bw10 "BW 10") | [1.3802](/materials/material-no/1.3802 "1.3802") | Non-magnetic steels | 1.05–1.35 | 7 | | [BW1](/materials/bs/bw1 "BW1") | [1.1535](/materials/material-no/1.1535 "1.1535") | Unalloyed tool steels / carbon steels | 0.85–0.95 | 14 | | [BW1](/materials/bs/bw1 "BW1") | [1.1830](/materials/material-no/1.1830 "1.1830") | Unalloyed tool steels / carbon steels | 0.8–0.9 | 10 | | [BW10](/materials/bs/bw10 "BW10") | [1.3401](/materials/material-no/1.3401 "1.3401") | Quenched and tempered steels | 1.1–1.3 | 19 | | [BW1A](/materials/bs/bw1a "BW1A") | [1.1525](/materials/material-no/1.1525 "1.1525") | Unalloyed tool steels / carbon steels | 0.75–0.85 | 20 | | [BW1A](/materials/bs/bw1a "BW1A") | [1.1545](/materials/material-no/1.1545 "1.1545") | Unalloyed tool steels / carbon steels | 1–1.1 | 19 | | [BW1A](/materials/bs/bw1a "BW1A") | [1.1625](/materials/material-no/1.1625 "1.1625") | Unalloyed tool steels / carbon steels | 0.75–0.85 | 15 | | [BW1A](/materials/bs/bw1a "BW1A") | [1.1645](/materials/material-no/1.1645 "1.1645") | Unalloyed tool steels / carbon steels | 1–1.1 | 18 | | [BW1A](/materials/bs/bw1a "BW1A") | [1.1830](/materials/material-no/1.1830 "1.1830") | Unalloyed tool steels / carbon steels | 0.8–0.9 | 10 | | [BW1A](/materials/bs/bw1a "BW1A") | — | — | 0.85–0.94 | 4 | | [BW1B](/materials/bs/bw1b "BW1B") | [1.1545](/materials/material-no/1.1545 "1.1545") | Unalloyed tool steels / carbon steels | 1–1.1 | 19 | | [BW1B](/materials/bs/bw1b "BW1B") | [1.1645](/materials/material-no/1.1645 "1.1645") | Unalloyed tool steels / carbon steels | 1–1.1 | 18 | | [BW1B](/materials/bs/bw1b "BW1B") | [1.1625](/materials/material-no/1.1625 "1.1625") | Unalloyed tool steels / carbon steels | 0.75–0.85 | 15 | | [BW1B](/materials/bs/bw1b "BW1B") | [1.1535](/materials/material-no/1.1535 "1.1535") | Unalloyed tool steels / carbon steels | 0.85–0.95 | 14 | | [BW1C](/materials/bs/bw1c "BW1C") | [1.1555](/materials/material-no/1.1555 "1.1555") | Unalloyed tool steels / carbon steels | 1.15–1.25 | 16 | | [BW1C](/materials/bs/bw1c "BW1C") | — | — | 1.15–1.24 | 7 | | [BW2](/materials/bs/bw2 "BW2") | [1.2833](/materials/material-no/1.2833 "1.2833") | Tool steels for cold work | 0.95–1.05 | 7 | | [BW2](/materials/bs/bw2 "BW2") | [1.1545](/materials/material-no/1.1545 "1.1545") | Unalloyed tool steels / carbon steels | 1–1.1 | 19 | | [C10 C10E C10R](/materials/bs/c10-c10e-c10r "C10 C10E C10R") | [1.1121](/materials/material-no/1.1121 "1.1121") | Case hardening steels | 0.07–0.13 | 22 | | [C10E](/materials/din-en/c10e "C10E") | [1.1121](/materials/material-no/1.1121 "1.1121") | Case hardening steels | 0.07–0.13 | 22 | | [C12](/materials/bs/c12 "C12") | [1.4306](/materials/material-no/1.4306 "1.4306") | Stainless steels | ≤ 0.03 | 18 | | [C120U](/materials/din-en/c120u "C120U") | — | — | 1.15–1.24 | 7 | | [C15 C15E C15R](/materials/bs/c15-c15e-c15r "C15 C15E C15R") | [1.1141](/materials/material-no/1.1141 "1.1141") | Case hardening steels | 0.12–0.18 | 20 | | [C15E](/materials/din-en/c15e "C15E") | [1.0401](/materials/material-no/1.0401 "1.0401") | Case hardening steels | 0.12–0.18 | 23 | | [C22](/materials/is/c22 "C22") | [1.0402](/materials/material-no/1.0402 "1.0402") | Quenched and tempered steels | 0.17–0.24 | 24 | | [C22E](/materials/din-en/c22e "C22E") | [1.0402](/materials/material-no/1.0402 "1.0402") | Quenched and tempered steels | 0.17–0.24 | 24 | | [C25](/materials/din-en/c25 "C25") | [1.0406](/materials/material-no/1.0406 "1.0406") | Quenched and tempered steels | 0.22–0.29 | 20 | | [C25 C25E C25R](/materials/bs/c25-c25e-c25r "C25 C25E C25R") | [1.0406](/materials/material-no/1.0406 "1.0406") | Quenched and tempered steels | 0.22–0.29 | 20 | | [C25 C25E C25R](/materials/bs/c25-c25e-c25r "C25 C25E C25R") | [1.0415](/materials/material-no/1.0415 "1.0415") | Quenched and tempered steels | 0.24–0.29 | 6 | **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/20 "Previous") Page 21 of 31[Next](/materials/bs/page/22 "Next")