ISO steel grades — 531 designations — Page 8
Every grade designated under ISO, 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
531 designations| Grade | Material no. | Category | C% by weight | Also inother standards |
|---|---|---|---|---|
| FeE690 | 1.0070 | Unalloyed structural steels | — | 16 |
| FeE690 | 1.0070 | Unalloyed structural steels | — | 16 |
| FeNi32Cr21AlTi | 1.4876 | Heat resistant steels | ≤ 0.12 | 12 |
| FeNi32Cr21AlTi | 1.4958 | High-temperature steels | 0.03–0.08 | 6 |
| FeNi32Cr21AlTi | 1.4959 | High-temperature steels | 0.05–0.1 | 6 |
| FeNi32Cr21AlTi | 1.4558 | Stainless steels | ≤ 0.03 | 4 |
| FeNi35Cr20Cu4Mo2 | 2.4660 | Nickel and cobalt alloys | ≤ 0.07 | 4 |
| FeNi35Cr20Cu4Mo2 | 1.4527 | Others | ≤ 0.06 | 3 |
| FP17A | 1.4520 | Stainless steels | ≤ 0.025 | 1 |
| FP18B | 1.4510 | Stainless steels | ≤ 0.05 | 14 |
| FP18B | 1.4511 | Stainless steels | ≤ 0.05 | 11 |
| H16 | 1.4845 | Heat resistant steels | ≤ 0.1 | 21 |
| H17 | 1.4864 | Heat resistant steels | ≤ 0.15 | 14 |
| HR2 | 1.0332 | Unalloyed structural steels | ≤ 0.12 | 16 |
| HR4 | 1.0335 | Unalloyed structural steels | ≤ 0.08 | 12 |
| HS1-8-1 | — | — | 0.77–0.87 | 2 |
| HS18-0-1 | 1.3355 | High-speed steels | 0.73–0.83 | 22 |
| HS2-9-1-8 | 1.3247 | High-speed steels | 1.05–1.15 | 14 |
| HS3-3-2 | — | — | 0.95–1.03 | 1 |
| HS6-5-2 | 1.3343 | High-speed steels | 0.86–0.94 | 19 |
| HS6-5-2 | 1.3339 | High-speed steels | 0.8–0.88 | 16 |
| HS6-5-2-5 | 1.3243 | High-speed steels | 0.87–0.95 | 19 |
| HS6-5-2C | 1.3339 | High-speed steels | 0.8–0.88 | 16 |
| HS6-5-2C | 1.3343 | High-speed steels | 0.86–0.94 | 19 |
| HS6-5-3 | — | — | 1.15–1.25 | 4 |
| HS6-5-3 | — | — | 1.25–1.32 | 4 |
| HS6-5-3-8 | — | — | 1.23–1.33 | 1 |
| HS6-5-4 | — | — | 1.25–1.35 | 2 |
| MM12G | 1.4913 | High-temperature steels | 0.17–0.23 | 3 |
| MM12G | 1.4916 | Others | 0.15–0.2 | 3 |
| N04400 | 2.4360 | Nickel and cobalt alloys | ≤ 0.15 | 7 |
| N05500 | 2.4375 | Nickel and cobalt alloys | ≤ 0.2 | 6 |
| N06059 | 2.4605 | Nickel and cobalt alloys | ≤ 0.01 | 3 |
| N06200 | 2.4675 | Others | ≤ 0.01 | 1 |
| N5 | 2.4066 | Nickel and cobalt alloys | ≤ 0.1 | 10 |
| N5 | 2.4068 | Nickel and cobalt alloys | ≤ 0.02 | 8 |
| NC2100 | 2.4066 | Nickel and cobalt alloys | ≤ 0.1 | 10 |
| NC2100 | 2.4068 | Nickel and cobalt alloys | ≤ 0.02 | 8 |
| NC2100-HC | 2.4066 | Nickel and cobalt alloys | ≤ 0.1 | 10 |
| NC2100-HC | 2.4068 | Nickel and cobalt alloys | ≤ 0.02 | 8 |
| Ni1067 | 2.4600 | Others | ≤ 0.01 | 1 |
| Ni6025 | 2.4633 | Nickel and cobalt alloys | 0.15–0.25 | 3 |
| Ni6231 | 2.4733 | Others | 0.05–0.15 | 5 |
| Ni6601 | 2.4851 | Heat resistant steels | 0.03–0.1 | 7 |
| Ni6686 | 2.4606 | Others | ≤ 0.01 | 3 |
| Ni99,0 | 2.4066 | Nickel and cobalt alloys | ≤ 0.1 | 10 |
| Ni99,0 | 2.4068 | Nickel and cobalt alloys | ≤ 0.02 | 8 |
| Ni99.0/LC | 2.4066 | Nickel and cobalt alloys | ≤ 0.1 | 10 |
| Ni99.0/LC | 2.4068 | Nickel and cobalt alloys | ≤ 0.02 | 8 |
| NiCr16Mo16Ti | 2.4610 | Nickel and cobalt alloys | ≤ 0.015 | 3 |
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.