GB steel grades — 1318 designations — Page 26
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. 15 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 |
|---|---|---|---|---|
| Y16Cr17Ni2Mo This grade’s own name | — | — | 0.12–0.2 | — |
| Y1Cr17 | 1.4004 | Others | ≤ 0.09 | 5 |
| Y1Cr17 | 1.4019 | Others | 0.1–0.17 | 5 |
| Y1Cr17 | 1.4104 | Stainless steels | 0.1–0.17 | 13 |
| Y1Cr17 | 1.4105 | Stainless steels | ≤ 0.08 | 10 |
| Y1Cr18Ni9 | 1.4305 | Stainless steels | ≤ 0.1 | 17 |
| Y1Cr18Ni9Se | 1.4625 | Others | ≤ 0.15 | 7 |
| Y20 This grade’s own name | — | — | 0.17–0.25 | — |
| Y30 | 1.0726 | Free cutting steels | 0.32–0.39 | 15 |
| Y30Cr13 This grade’s own name | — | — | 0.26–0.35 | — |
| Y35 | 1.0726 | Free cutting steels | 0.32–0.39 | 15 |
| Y35Mn This grade’s own name | — | — | 0.32–0.4 | — |
| Y3Cr13 | 1.4028 | Stainless steels | 0.26–0.35 | 18 |
| Y3Cr13 | 1.4029 | Stainless steels | 0.25–0.32 | 10 |
| Y40Mn | 1.0762 | Free cutting steels | 0.4–0.48 | 20 |
| Y40MnS This grade’s own name | — | — | 0.35–0.45 | — |
| Y45 This grade’s own name | — | — | 0.42–0.5 | — |
| Y45Ca This grade’s own name | — | — | 0.42–0.5 | — |
| Y45Mn This grade’s own name | — | — | 0.4–0.5 | — |
| Y45MnPb This grade’s own name | — | — | 0.4–0.48 | — |
| Y45MnS This grade’s own name | — | — | 0.4–0.48 | — |
| Y45MnSn This grade’s own name | — | — | 0.4–0.48 | — |
| Y45MnSPb This grade’s own name | — | — | 0.4–0.48 | — |
| Y45Sn This grade’s own name | — | — | 0.4–0.48 | — |
| Y50 This grade’s own name | — | — | 0.48–0.56 | — |
| Z640Mn | 1.1167 | Quenched and tempered steels | 0.32–0.4 | 17 |
| ZG 25 | 1.1155 | Others | 0.2–0.28 | 6 |
| ZG0Cr18Ni9Ti This grade’s own name | — | — | ≤ 0.08 | — |
| ZG12Cr18Ni9Ti | 1.4312 | Cast stainless steels | ≤ 0.12 | 15 |
| ZG15Cr13 | 1.4006 | Stainless steels | 0.08–0.15 | 26 |
| ZG15Cr1Mo1V | 1.7706 | Others | 0.15–0.2 | 2 |
| ZG1Cr13 | 1.4006 | Stainless steels | 0.08–0.15 | 26 |
| ZG1Cr18Ni9 | 1.4312 | Cast stainless steels | ≤ 0.12 | 15 |
| ZG1Cr18Ni9Ti | 1.4312 | Cast stainless steels | ≤ 0.12 | 15 |
| ZG200-400 | 1.0449 | Others | ≤ 0.18 | 1 |
| ZG200-400 | 1.0401 | Case hardening steels | 0.12–0.18 | 23 |
| ZG200-400 | 1.0416 | Others | 0.15–0.2 | 17 |
| ZG20Cr13 | 1.4027 | Cast stainless steels | 0.16–0.23 | 14 |
| ZG20CrMo | 1.7221 | Others | 0.22–0.29 | 1 |
| ZG20CrMoV | 1.7357 | Others | 0.15–0.2 | 2 |
| ZG20SiMn | 1.6220 | Others | 0.17–0.23 | 2 |
| ZG230-450 | 1.0455 | Others | ≤ 0.23 | 2 |
| ZG230-450 | 1.0619 | Others | 0.18–0.23 | 2 |
| ZG270-500 | 1.0501 | Quenched and tempered steels | 0.32–0.39 | 23 |
| ZG270-500 | 1.0552 | Others | ≤ 0.25 | 13 |
| ZG2Cr13 | 1.4027 | Cast stainless steels | 0.16–0.23 | 14 |
| ZG310-570 | 1.0558 | Others | — | 5 |
| ZG310-570 | 1.0503 | Quenched and tempered steels | 0.42–0.5 | 24 |
| ZG340-640 | 1.0558 | Others | — | 5 |
| ZG340-640 | 1.0535 | Quenched and tempered steels | 0.52–0.6 | 21 |
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.