BS steel grades — 1547 designations — Page 17
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 inother standards |
|---|---|---|---|---|
| 620 | 1.7335 | Heat-resistant structural steels | 0.08–0.18 | 22 |
| 620-440 | 1.7335 | Heat-resistant structural steels | 0.08–0.18 | 22 |
| 620-440 | 1.7262 | Case hardening steels | 0.13–0.17 | 18 |
| 620-470 | 1.7262 | Case hardening steels | 0.13–0.17 | 18 |
| 620-470 | 1.7335 | Heat-resistant structural steels | 0.08–0.18 | 22 |
| 620-540 | 1.7262 | Case hardening steels | 0.13–0.17 | 18 |
| 620-540 | 1.7335 | Heat-resistant structural steels | 0.08–0.18 | 22 |
| 620CR . B | 1.7335 | Heat-resistant structural steels | 0.08–0.18 | 22 |
| 620Gr.27 | 1.7335 | Heat-resistant structural steels | 0.08–0.18 | 22 |
| 620Gr.27 | 1.7337 | Heat-resistant structural steels | 0.13–0.2 | 9 |
| 621 | 1.7733 | Heat-resistant structural steels | 0.2–0.28 | 15 |
| 622 | 1.7380 | Heat-resistant structural steels | 0.08–0.14 | 20 |
| 622-490 | 1.7380 | Heat-resistant structural steels | 0.08–0.14 | 20 |
| 622Gr.31 | 1.7380 | Heat-resistant structural steels | 0.08–0.14 | 20 |
| 625 | 1.7362 | Hydrogen resistant steels | 0.1–0.15 | 13 |
| 625 | 1.7366 | Others | ≤ 0.18 | 6 |
| 637H17 | 1.5714 | Case hardening steels | 0.13–0.19 | 6 |
| 637H17 | 1.5715 | Case hardening steels | 0.13–0.19 | 7 |
| 637M17 | 1.5714 | Case hardening steels | 0.13–0.19 | 6 |
| 640A35 | 1.5710 | Quenched and tempered steels | 0.32–0.4 | 14 |
| 640A35 | 1.5711 | Others | 0.38–0.43 | 8 |
| 640M40 | 1.5711 | Others | 0.38–0.43 | 8 |
| 640M40 | 1.5710 | Quenched and tempered steels | 0.32–0.4 | 14 |
| 653M31 | 1.5755 | Quenched and tempered steels | 0.27–0.35 | 9 |
| 655H13 | 1.5752 | Case hardening steels | 0.14–0.2 | 15 |
| 655H13 | 1.5752 | Case hardening steels | 0.14–0.2 | 15 |
| 655M13 | 1.5752 | Case hardening steels | 0.14–0.2 | 15 |
| 655M13 | 1.5752 | Case hardening steels | 0.14–0.2 | 15 |
| 655M13 | 1.5732 | Case hardening steels | 0.1–0.17 | 13 |
| 660 | 1.7715 | Heat-resistant structural steels | 0.1–0.18 | 8 |
| 660-460 | 1.7715 | Heat-resistant structural steels | 0.1–0.18 | 8 |
| 671-850 | 1.7733 | Heat-resistant structural steels | 0.2–0.28 | 15 |
| 681-820 | 1.7729 | Others | 0.17–0.23 | 3 |
| 685H57 | 1.7102 | Spring steels | 0.51–0.59 | 14 |
| 68F62 | 1.8969 | Fine-grain steels for cold forming | ≤ 0.12 | 2 |
| 6F7 | 1.2767 | Tool steels for cold work | 0.4–0.5 | 9 |
| 700/2 | EN-JS1102 | Others | — | 21 |
| 700/2 | EN-JS1103 | Others | — | 21 |
| 703-B | 2.4630 | High-temperature steels / aviation variant | 0.08–0.15 | 3 |
| 708A25 | 1.7218 | Quenched and tempered steels | 0.22–0.29 | 25 |
| 708A25 | 1.7220 | Quenched and tempered steels | 0.3–0.37 | 24 |
| 708A30 | 1.7220 | Quenched and tempered steels | 0.3–0.37 | 24 |
| 708A37 | 1.7220 | Quenched and tempered steels | 0.3–0.37 | 24 |
| 708A37 | 1.2330 | Others | 0.32–0.37 | 8 |
| 708A42 | 1.7225 | Quenched and tempered steels | 0.38–0.45 | 25 |
| 708A47 | 1.7228 | Quenched and tempered steels | 0.46–0.54 | 12 |
| 708H20 | 1.7243 | Case hardening steels | 0.15–0.21 | 12 |
| 708H20 | 1.7218 | Quenched and tempered steels | 0.22–0.29 | 25 |
| 708H37 This grade’s own name | 1.7225 | Quenched and tempered steels | 0.38–0.45 | 25 |
| 708M20 | 1.7243 | Case hardening steels | 0.15–0.21 | 12 |
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.