GB steel grades — 1318 designations — Page 13
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 asserted identity — the same grade under this standard’s own designation. 22 of 50 rows differ and carry an “Indicative” mark.
Also known as
1318 designations| Grade | Material no. | Category | C% by weight | Also inother standards |
|---|---|---|---|---|
| 4Cr2Mn1MoS | — | — | 0.35–0.45 | — |
| 4Cr3Mo3SiV | — | — | 0.35–0.45 | — |
| 4Cr5Mo2V | — | — | 0.32–0.43 | — |
| 4Cr5Mo3V | — | — | 0.35–0.4 | — |
| 4Cr5MoSiV Indicative | 1.2343 | Tool steels for hot work | 0.33–0.41 | 20 |
| 4Cr5MoSiV1 Indicative | 1.2344 | Tool steels for hot work | 0.35–0.42 | 20 |
| 4Cr5MoWVSi | — | — | 0.32–0.4 | — |
| 4Cr5W2VSi | — | — | 0.32–0.42 | — |
| 4Cr9Si2 Indicative | 1.4718 | Valve steels | 0.4–0.5 | 16 |
| 4Cr9Si2 Indicative | 1.4718 | Others | 0.4–0.5 | 16 |
| 4Cr9Si8 Indicative | 1.4718 | Valve steels | 0.4–0.5 | 16 |
| 4Cr9Si8 Indicative | 1.4718 | Others | 0.4–0.5 | 16 |
| 4CrMnSiMoV | — | — | 0.35–0.45 | — |
| 4CrNi4Mo | — | — | 0.4–0.5 | — |
| 4CrW2Si | — | — | 0.35–0.45 | 5 |
| 50 Indicative | 1.1171 | Others | 0.48–0.52 | 6 |
| 50 Indicative | 1.1201 | Quenched and tempered steels | 0.42–0.5 | 11 |
| 50 Indicative | 1.9505 | Others | 0.46–0.53 | 6 |
| 50 Indicative | 1.1210 | Steels for surface hardening | 0.5–0.57 | 8 |
| 50 Indicative | 1.0540 | Quenched and tempered steels | 0.47–0.55 | 13 |
| 50 Indicative | 1.0535 | Quenched and tempered steels | 0.52–0.6 | 21 |
| 50 Indicative | 1.1213 | Steels for surface hardening | 0.5–0.57 | 11 |
| 50B | 1.0045 | Unalloyed structural steels | ≤ 0.24 | 17 |
| 50Cr | — | — | 0.47–0.54 | — |
| 50Cr15MoV | — | — | 0.45–0.55 | — |
| 50CrMn | — | — | 0.46–0.54 | — |
| 50CrMo Indicative | 1.7228 | Quenched and tempered steels | 0.46–0.54 | 12 |
| 50CrV | — | — | 0.46–0.54 | — |
| 50CrVA Indicative | 1.8159 | Quenched and tempered steels | 0.47–0.55 | 27 |
| 50CrVA Indicative | 1.2241 | Tool steels for cold work | 0.47–0.55 | 9 |
| 50Mn | — | — | 0.47–0.55 | — |
| 50Mn2 | — | — | 0.47–0.55 | — |
| 50СrVA Indicative | 1.8159 | Quenched and tempered steels | 0.47–0.55 | 27 |
| 51CrMnV | — | — | 0.47–0.55 | 1 |
| 52CrMnMoV | — | — | 0.48–0.56 | 2 |
| 52SiCrMnNi | — | — | 0.49–0.56 | 1 |
| 53Cr21Mn9Ni4N | — | — | 0.48–0.58 | — |
| 55 Indicative | 1.1203 | Quenched and tempered steels | 0.52–0.6 | 15 |
| 55 Indicative | — | — | — | 3 |
| 55 Indicative | 1.0535 | Quenched and tempered steels | 0.52–0.6 | 21 |
| 55CrMn | — | — | 0.52–0.6 | — |
| 55CrMnA Indicative | 1.7176 | Spring steels | 0.52–0.59 | 18 |
| 55Mn | — | — | 0.52–0.6 | — |
| 55Si2Mn Indicative | 1.5026 | Spring steels | 0.52–0.6 | 20 |
| 55Si2MnB | — | — | 0.52–0.6 | — |
| 55Si2MnCr | — | — | 0.52–0.6 | 1 |
| 55SiCr | — | — | 0.51–0.59 | — |
| 55SiCrA | — | — | 0.51–0.59 | — |
| 55SiCrV | — | — | 0.51–0.59 | 1 |
| 55SiMnMoV | — | — | 0.52–0.6 | — |
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.