UNS steel grades — 2038 designations — Page 24
Every grade designated under UNS, 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
2038 designations| Grade | Material no. | Category | C% by weight | Also inother standards |
|---|---|---|---|---|
| K21590 | 1.7383 | Heat-resistant structural steels | 0.08–0.15 | 9 |
| K21604 Indicative | 1.8881 | Others | ≤ 0.2 | 1 |
| K21604 Indicative | 1.8907 | Fine-grain structural steels | ≤ 0.21 | 1 |
| K21604 Indicative | 1.8917 | Fine-grain structural steels | ≤ 0.21 | 1 |
| K21604 Indicative | 1.8928 | High-strength steels | ≤ 0.2 | 7 |
| K21604 Indicative | 1.8937 | Fine-grain structural steels | ≤ 0.21 | 1 |
| K21650 Indicative | 1.8881 | Others | ≤ 0.2 | 1 |
| K21650 Indicative | 1.8907 | Fine-grain structural steels | ≤ 0.21 | 1 |
| K21650 Indicative | 1.8917 | Fine-grain structural steels | ≤ 0.21 | 1 |
| K21650 Indicative | 1.8928 | High-strength steels | ≤ 0.2 | 7 |
| K21650 Indicative | 1.8937 | Fine-grain structural steels | ≤ 0.21 | 1 |
| K21703 Indicative | 1.5622 | Low-temperature structural steels | ≤ 0.18 | 6 |
| K21703 Indicative | 1.5635 | Low-temperature structural steels | ≤ 0.15 | 1 |
| K21903 | 1.6227 | Others | 0.08–0.14 | 1 |
| K22033 | 1.5710 | Quenched and tempered steels | 0.32–0.4 | 14 |
| K22033 Indicative | 1.5815 | Others | 0.3–0.37 | 5 |
| K22033 Indicative | 1.5711 | Others | 0.38–0.43 | 8 |
| K22094 | 1.7339 | Others | 0.09–0.14 | 1 |
| K22103 | 1.5622 | Low-temperature structural steels | ≤ 0.18 | 6 |
| K23028 | 1.6565 | Quenched and tempered steels | 0.35–0.45 | 15 |
| K23080 Indicative | 1.2057 | Tool steels for cold work | 1–1.1 | 4 |
| K23080 Indicative | 1.2067 | Tool steels for cold work | 0.95–1.1 | 21 |
| K23080 Indicative | 1.3505 | Bearing steels | 0.93–1.05 | 22 |
| K23080 | — | — | — | 3 |
| K23280 | 1.8545 | Others | 0.29–0.36 | 1 |
| K23510 | 1.8507 | Nitriding steels | 0.3–0.37 | 8 |
| K23550 | 1.6586 | Others | 0.26–0.34 | 1 |
| K23745 | 1.8506 | Nitriding steels | 0.3–0.37 | 1 |
| K24064 | 1.6562 | Quenched and tempered steels | 0.37–0.44 | 10 |
| K24065 Indicative | 1.8509 | Nitriding steels | 0.38–0.45 | 16 |
| K24065 Indicative | 1.8514 | Special steels for aviation and aerospace | 0.26–0.34 | 1 |
| K24340 | 1.7765 | Special steels for defense technology | 0.3–0.35 | 1 |
| K24340 Indicative | 1.8522 | Others | 0.29–0.36 | 2 |
| K24728 | 1.8509 | Nitriding steels | 0.38–0.45 | 16 |
| K31390 | 1.7767 | Others | 0.1–0.15 | 1 |
| K31545 | 1.7381 | Others | 0.06–0.15 | 1 |
| K31718 | 1.5637 | Low-temperature structural steels | ≤ 0.15 | 11 |
| K31718 | 1.5639 | Low-temperature structural steels | 0.12–0.19 | 9 |
| K31830 | 1.7767 | Others | 0.1–0.15 | 1 |
| K31835 Indicative | 1.7703 | Others | 0.11–0.15 | 1 |
| K31835 Indicative | 1.7767 | Others | 0.1–0.15 | 1 |
| K31918 | 1.5637 | Low-temperature structural steels | ≤ 0.15 | 11 |
| K31918 | 1.5639 | Low-temperature structural steels | 0.12–0.19 | 9 |
| K32018 | 1.5637 | Low-temperature structural steels | ≤ 0.15 | 11 |
| K32018 | 1.5639 | Low-temperature structural steels | 0.12–0.19 | 9 |
| K32025 | 1.5637 | Low-temperature structural steels | ≤ 0.15 | 11 |
| K32025 | 1.5639 | Low-temperature structural steels | 0.12–0.19 | 9 |
| K32026 | 1.5639 | Low-temperature structural steels | 0.12–0.19 | 9 |
| K32045 | 1.6742 | Quenched and tempered steels | 0.17–0.25 | 1 |
| K32550 | — | — | — | 2 |
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.