GB steel grades — 1318 designations — Page 19
Every grade designated under GB, 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. 22 of 50 rows differ and carry a “This grade’s own name” mark.
Also known as
1318 designations| Grade | Material no. | Category | C% by weight | Also inother standards |
|---|---|---|---|---|
| ML25B This grade’s own name | — | — | 0.23–0.28 | — |
| ML25CrMo This grade’s own name | — | — | 0.23–0.28 | 3 |
| ML25Mn | 1.0528 | Quenched and tempered steels | 0.27–0.34 | 14 |
| ML25MnB This grade’s own name | — | — | 0.23–0.28 | — |
| ML28B This grade’s own name | — | — | 0.25–0.32 | — |
| ML30 | 1.0528 | Quenched and tempered steels | 0.27–0.34 | 14 |
| ML30B This grade’s own name | — | — | 0.28–0.33 | — |
| ML30Cr This grade’s own name | — | — | 0.28–0.33 | — |
| ML30Cr13 This grade’s own name | — | — | 0.26–0.35 | — |
| ML30CrMo | 1.7220 | Quenched and tempered steels | 0.3–0.37 | 24 |
| ML30CrMo | 1.7218 | Quenched and tempered steels | 0.22–0.29 | 25 |
| ML30CrMoA | 1.7220 | Quenched and tempered steels | 0.3–0.37 | 24 |
| ML30CrMoA | 1.7218 | Quenched and tempered steels | 0.22–0.29 | 25 |
| ML30Mn | 1.1170 | Quenched and tempered steels | 0.25–0.32 | 16 |
| ML30MnB This grade’s own name | — | — | 0.28–0.33 | — |
| ML35 | 1.0501 | Quenched and tempered steels | 0.32–0.39 | 23 |
| ML35B This grade’s own name | — | — | 0.33–0.38 | — |
| ML35Cr This grade’s own name | — | — | 0.33–0.38 | 4 |
| ML35CrMo | 1.7220 | Quenched and tempered steels | 0.3–0.37 | 24 |
| ML35MnB This grade’s own name | — | — | 0.33–0.38 | — |
| ML37Cr This grade’s own name | — | — | 0.34–0.41 | — |
| ML37CrB This grade’s own name | — | — | 0.34–0.41 | — |
| ML38CrA | 1.7034 | Quenched and tempered steels | 0.34–0.41 | 23 |
| ML40 | 1.0511 | Quenched and tempered steels | 0.37–0.44 | 21 |
| ML40Cr | 1.7034 | Quenched and tempered steels | 0.34–0.41 | 23 |
| ML40CrMo This grade’s own name | — | — | 0.38–0.43 | 4 |
| ML40CrNiMoA | 1.6565 | Quenched and tempered steels | 0.35–0.45 | 15 |
| ML40MnB This grade’s own name | — | — | 0.38–0.43 | — |
| ML42CrMo This grade’s own name | — | — | 0.38–0.45 | 4 |
| ML45 | 1.0503 | Quenched and tempered steels | 0.42–0.5 | 24 |
| ML45Cr This grade’s own name | — | — | 0.43–0.48 | 2 |
| ML45CrMo This grade’s own name | — | — | 0.43–0.48 | 2 |
| ML45Mn | 1.0912 | Others | 0.42–0.5 | 11 |
| MnCrWV This grade’s own name | — | — | 0.9–1.05 | — |
| N029 | 1.3243 | High-speed steels | 0.87–0.95 | 19 |
| Ni25Cr15Ti2MoMn This grade’s own name | — | — | ≤ 0.08 | — |
| NiFe36Cr12Mo6Ti3 | 2.4975 | High-temperature steels | ≤ 0.1 | 4 |
| NM400 This grade’s own name | — | — | ≤ 0.3 | — |
| NM500 This grade’s own name | — | — | ≤ 0.38 | — |
| NS1403 | 2.4660 | Nickel and cobalt alloys | ≤ 0.07 | 4 |
| NS1403 | 1.4527 | Others | ≤ 0.06 | 3 |
| NS1502 | 2.4854 | Others | ≤ 0.05 | 1 |
| NS3103 | 2.4851 | Heat resistant steels | 0.03–0.1 | 7 |
| NS3305 | 2.4610 | Nickel and cobalt alloys | ≤ 0.015 | 3 |
| NS3308 | 2.4602 | Nickel and cobalt alloys | ≤ 0.01 | 5 |
| NS3309 | 2.4606 | Others | ≤ 0.01 | 3 |
| NS3312 | 2.4665 | High-temperature steels | 0.05–0.15 | 11 |
| NS3313 | 2.4733 | Others | 0.05–0.15 | 5 |
| NS3402 | 2.4663 | Nickel and cobalt alloys | 0.05–0.1 | 6 |
| NS5200 | 2.4066 | Nickel and cobalt alloys | ≤ 0.1 | 10 |
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.