ISO steel grades — 531 designations — Page 6
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 |
|---|---|---|---|---|
| C60 | 1.0601 | Quenched and tempered steels | 0.57–0.65 | 25 |
| C60 C60E4 C60M2 | 1.1212 | Others | 0.56–0.6 | 5 |
| C60 C60E4 C60M2 | 1.1228 | Others | 0.58–0.62 | 5 |
| C60 C60E4 C60M2 | — | — | — | 3 |
| C60E4 | 1.1221 | Quenched and tempered steels | 0.57–0.65 | 18 |
| C60M2 | 1.1223 | Quenched and tempered steels | 0.57–0.65 | 4 |
| C70U | 1.1620 | Unalloyed tool steels / carbon steels | 0.65–0.74 | 14 |
| C70U | 1.1520 | Unalloyed tool steels / carbon steels | 0.65–0.75 | 11 |
| C70W1 | 1.1620 | Unalloyed tool steels / carbon steels | 0.65–0.74 | 14 |
| C70W1 | 1.1520 | Unalloyed tool steels / carbon steels | 0.65–0.75 | 11 |
| C80U | 1.1625 | Unalloyed tool steels / carbon steels | 0.75–0.85 | 15 |
| C80U | 1.1525 | Unalloyed tool steels / carbon steels | 0.75–0.85 | 20 |
| C90U | 1.1830 | Unalloyed tool steels / carbon steels | 0.8–0.9 | 10 |
| C90U | 1.1535 | Unalloyed tool steels / carbon steels | 0.85–0.95 | 14 |
| CC21A | — | — | 0.18–0.23 | 5 |
| CC8A | — | — | 0.08–0.13 | 5 |
| CE20BG2 | — | — | 0.14–0.2 | 3 |
| Cr01 | 1.0330 | Unalloyed structural steels | ≤ 0.12 | 17 |
| Cr04 | 1.0338 | Unalloyed structural steels | ≤ 0.08 | 18 |
| CR22 | 1.0330 | Unalloyed structural steels | ≤ 0.12 | 17 |
| CR24 | 1.0338 | Unalloyed structural steels | ≤ 0.08 | 18 |
| CrNiMo13-5-2 | 1.4415 | Others | ≤ 0.03 | 3 |
| CrNiMo22-5-3 | 1.4462 | Stainless steels | ≤ 0.03 | 13 |
| CrNiMo25-7-4 | 1.4501 | Stainless steels | ≤ 0.03 | 8 |
| CrNiMo25-7-4 | 1.4410 | Stainless steels | ≤ 0.03 | 9 |
| CS65 | 1.1231 | Spring steels | 0.65–0.73 | 18 |
| CS65 | 1.1234 | Others | 0.6–0.75 | 9 |
| CS65 | 1.0603 | Spring steels | 0.65–0.72 | 10 |
| CS65 | 1.2007 | Tool steels for cold work | 0.65–0.7 | 8 |
| CS85 | 1.1269 | Spring steels | 0.8–0.9 | 14 |
| CS85 | 1.2004 | Tool steels for cold work | 0.8–0.9 | 8 |
| CS95 | 1.1274 | Spring steels | 0.95–1.05 | 13 |
| CT105 | 1.1545 | Unalloyed tool steels / carbon steels | 1–1.1 | 19 |
| CT105 | 1.1645 | Unalloyed tool steels / carbon steels | 1–1.1 | 18 |
| D26 | 1.4567 | Stainless steels | ≤ 0.04 | 8 |
| E185 | 1.0035 | Unalloyed structural steels | — | 22 |
| E235-A | 1.0036 | Unalloyed structural steels | ≤ 0.17 | 20 |
| E235-A | 1.0036 | Unalloyed structural steels | ≤ 0.17 | 19 |
| E235-B | 1.0038 | Unalloyed structural steels | ≤ 0.17 | 26 |
| E235-B | 1.0486 | Fine-grain structural steels | ≤ 0.16 | 6 |
| E235-C | 1.0038 | Unalloyed structural steels | ≤ 0.17 | 26 |
| E235-C | 1.0461 | Fine-grain structural steels | ≤ 0.18 | 5 |
| E235-D | 1.0461 | Fine-grain structural steels | ≤ 0.18 | 5 |
| E235C | 1.0114 | Unalloyed structural steels | ≤ 0.17 | 21 |
| E275-A | 1.0144 | Unalloyed structural steels | ≤ 0.18 | 22 |
| E275-C | 1.0044 | Unalloyed structural steels | ≤ 0.21 | 26 |
| E275-D | 1.0044 | Unalloyed structural steels | ≤ 0.21 | 26 |
| E275B | 1.0044 | Unalloyed structural steels | ≤ 0.21 | 26 |
| E275C | 1.0143 | Unalloyed structural steels | ≤ 0.18 | 16 |
| E355 | 1.0562 | Fine-grain structural steels | ≤ 0.18 | 18 |
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.