UNI steel grades — 671 designations — Page 13
Every grade designated under UNI, 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. Every name on this page is an indicative cross-reference, not an asserted identity: the grades are close, not interchangeable. Check the composition before you substitute.
Also known as
671 designations| Grade | Material no. | Category | C% by weight | Also inother standards |
|---|---|---|---|---|
| X2CrNiN1811 | 1.4311 | Stainless steels | ≤ 0.03 | 13 |
| X2CrTi12 | 1.4512 | Stainless steels | ≤ 0.03 | 10 |
| X30Cr13 | 1.4028 | Stainless steels | 0.26–0.35 | 18 |
| X30WCrV5-3KU | 1.2567 | Tool steels for hot work | 0.25–0.35 | 9 |
| X30WCrV9-3KU | 1.2581 | Tool steels for hot work | 0.25–0.35 | 18 |
| X35CrMoV05KU | 1.2344 | Tool steels for hot work | 0.35–0.42 | 20 |
| X37CrMoV5-1KU | 1.2343 | Tool steels for hot work | 0.33–0.41 | 20 |
| X3CrNi18-10 | 1.4301 | Stainless steels | ≤ 0.07 | 23 |
| X3CrNi18-11 | 1.4306 | Stainless steels | ≤ 0.03 | 18 |
| X3CrTi17 | 1.4510 | Stainless steels | ≤ 0.05 | 14 |
| X40Cr14 | 1.4031 | Stainless steels | 0.36–0.42 | 18 |
| X40Cr14 | 1.4034 | Stainless steels | 0.43–0.5 | 18 |
| X40Cr14 | 1.2083 | Tool steels for cold work | 0.36–0.42 | 16 |
| X40CrMoV51KU | 1.2344 | Tool steels for hot work | 0.35–0.42 | 20 |
| X41Cr13KU | 1.4031 | Stainless steels | 0.36–0.42 | 18 |
| X45CrSi8 | 1.4718 | Valve steels | 0.4–0.5 | 16 |
| X45CrSi8 | 1.4718 | Others | 0.4–0.5 | 16 |
| X46Cr13 | 1.4031 | Stainless steels | 0.36–0.42 | 18 |
| X53CrMnNiN21-9 | 1.4871 | Valve steels | 0.48–0.58 | 17 |
| X5CrNi18-10 | 1.4301 | Stainless steels | ≤ 0.07 | 23 |
| X5CrNiMo17-12 | 1.4401 | Stainless steels | ≤ 0.07 | 20 |
| X5CrNiMo17-13 | 1.4436 | Stainless steels | ≤ 0.05 | 19 |
| X6 Cr 13 | — | — | — | 2 |
| X6CM3 | 1.4000 | Stainless steels | ≤ 0.08 | 16 |
| X6Cr13 | 1.4000 | Stainless steels | ≤ 0.08 | 16 |
| X6Cr17 | 1.4016 | Stainless steels | ≤ 0.08 | 18 |
| X6CrAl13 | 1.4003 | Stainless steels | ≤ 0.03 | 6 |
| X6CrAl13 | 1.4002 | Stainless steels | ≤ 0.08 | 13 |
| X6CrNb17 | 1.4510 | Stainless steels | ≤ 0.05 | 14 |
| X6CrNb17 | 1.4511 | Stainless steels | ≤ 0.05 | 11 |
| X6CrNi2314 | 1.4833 | Heat resistant steels | ≤ 0.15 | 15 |
| X6CrNi25-20 | 1.4842 | Others | ≤ 0.14 | 14 |
| X6CrNi25-21 | 1.4845 | Heat resistant steels | ≤ 0.1 | 21 |
| X6CrNi25-21KG | 1.4845 | Heat resistant steels | ≤ 0.1 | 21 |
| X6CrNi2520 | 1.4828 | Heat resistant steels | ≤ 0.2 | 20 |
| X6CrNi2520 | 1.4845 | Heat resistant steels | ≤ 0.1 | 21 |
| X6CrNi304 | 1.4313 | Stainless steels | ≤ 0.05 | 8 |
| X6CrNiMoNb1713 | 1.4583 | Cast stainless steels | ≤ 0.1 | 5 |
| X6CrNiMoTi 17 12 KG | 1.4571 | Stainless steels | ≤ 0.08 | 18 |
| X6CrNiMoTi 17 12 KW | 1.4571 | Stainless steels | ≤ 0.08 | 18 |
| X6CrNiMoTi17-13 | 1.4573 | Cast stainless steels | ≤ 0.04 | 12 |
| X6CrNiMoTi1712 | 1.4571 | Stainless steels | ≤ 0.08 | 18 |
| X6CrNiNb1811 | 1.4550 | Stainless steels | ≤ 0.08 | 15 |
| X6CrNiTi18 11 | 1.4878 | Heat resistant steels | ≤ 0.1 | 14 |
| X6CrNiTi18-11KG | 1.4541 | Stainless steels | ≤ 0.08 | 25 |
| X6CrNiTi18-11KT | 1.4541 | Stainless steels | ≤ 0.08 | 25 |
| X6CrNiTi1811 | 1.4541 | Stainless steels | ≤ 0.08 | 25 |
| X6CrTi12 | 1.4512 | Stainless steels | ≤ 0.03 | 10 |
| X6CrTi17 | 1.4511 | Stainless steels | ≤ 0.05 | 11 |
| X6CrTi17 | 1.4510 | Stainless steels | ≤ 0.05 | 14 |
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.