UNS steel grades — 2038 designations — Page 23
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. 10 of 50 rows differ and carry an “Indicative” mark.
Also known as
2038 designations| Grade | Material no. | Category | C% by weight | Also inother standards |
|---|---|---|---|---|
| K12554 Indicative | 1.6368 | Heat-resistant structural steels | ≤ 0.17 | 4 |
| K12609 Indicative | 1.0562 | Fine-grain structural steels | ≤ 0.18 | 18 |
| K12609 Indicative | 1.0565 | Fine-grain structural steels | ≤ 0.18 | 7 |
| K12609 Indicative | 1.0566 | Fine-grain structural steels | ≤ 0.18 | 11 |
| K12609 Indicative | 1.8963 | Weathering steels | ≤ 0.16 | 9 |
| K12700 | 1.8978 | Fine-grain structural steels | ≤ 0.16 | 2 |
| K12709 | 1.0539 | Fine-grain structural steels | ≤ 0.2 | 1 |
| K12709 | 1.0545 | Fine-grain structural steels | ≤ 0.2 | 9 |
| K12709 | 1.0570 | Unalloyed structural steels | ≤ 0.2 | 22 |
| K12709 | 1.0576 | Fine-grain structural steels | ≤ 0.22 | 3 |
| K12709 | 1.8978 | Fine-grain structural steels | ≤ 0.16 | 2 |
| K12765 | 1.6751 | Quenched and tempered steels | 0.17–0.25 | 1 |
| K12766 | 1.5403 | Heat-resistant structural steels | ≤ 0.19 | 1 |
| K12766 | 1.6368 | Heat-resistant structural steels | ≤ 0.17 | 4 |
| K12766 | 1.6751 | Quenched and tempered steels | 0.17–0.25 | 1 |
| K12766 | 1.6755 | Quenched and tempered steels | 0.17–0.27 | 2 |
| K12821 | 1.5423 | Heat-resistant structural steels | 0.12–0.2 | 5 |
| K12822 | 1.5415 | Heat-resistant structural steels | 0.12–0.2 | 15 |
| K12822 | 1.5421 | Heat-resistant structural steels | 0.15–0.25 | 1 |
| K12822 | 1.5423 | Heat-resistant structural steels | 0.12–0.2 | 5 |
| K13047 | 1.7216 | Low-temperature structural steels | 0.27–0.34 | 9 |
| K13047 | 1.7219 | Low-temperature structural steels | 0.22–0.29 | 1 |
| K13049 | 1.6546 | Quenched and tempered steels | 0.37–0.44 | 14 |
| K13050 Indicative | 1.5622 | Low-temperature structural steels | ≤ 0.18 | 6 |
| K13050 Indicative | 1.5633 | Low-temperature structural steels | 0.2–0.28 | 1 |
| K13050 Indicative | 1.6212 | Low-temperature structural steels | ≤ 0.14 | 1 |
| K13050 Indicative | 1.6217 | Low-temperature structural steels | ≤ 0.16 | 2 |
| K13548 | 1.7231 | Others | 0.38–0.45 | 2 |
| K14047 | 1.7223 | Steels for surface hardening | 0.38–0.44 | 13 |
| K14072 | 1.7711 | Heat-resistant structural steels | 0.36–0.44 | 3 |
| K14248 | 1.7225 | Quenched and tempered steels | 0.38–0.45 | 25 |
| K14508 | 1.5432 | Heat-resistant structural steels | 0.38–0.45 | 1 |
| K15048 | 1.8154 | Special steels for aviation and aerospace | 0.47–0.55 | 3 |
| K15590 | 1.7102 | Spring steels | 0.51–0.59 | 14 |
| K15590 | 1.7104 | Spring steels | 0.5–0.6 | 2 |
| K19195 | 1.3520 | Bearing steels | 0.93–1.05 | 16 |
| K19667 | 1.2127 | Tool steels for cold work | 1–1.1 | 1 |
| K19667 | 1.3518 | Others | 0.93–1.05 | 1 |
| K19965 | 1.3536 | Bearing steels | 0.93–1.05 | 2 |
| K19965 | 1.3537 | Others | 0.93–1.05 | 4 |
| K20900 | 1.7339 | Others | 0.09–0.14 | 1 |
| K20910 | 1.6227 | Others | 0.08–0.14 | 1 |
| K21001 | 1.6369 | Others | ≤ 0.17 | 1 |
| K21010 | 1.6227 | Others | 0.08–0.14 | 1 |
| K21390 | 1.7375 | Heat-resistant structural steels | 0.1–0.15 | 6 |
| K21390 | 1.7380 | Heat-resistant structural steels | 0.08–0.14 | 20 |
| K21390 Indicative | 1.7383 | Heat-resistant structural steels | 0.08–0.15 | 9 |
| K21509 | 1.7358 | Others | ≤ 0.15 | 1 |
| K21590 | 1.7375 | Heat-resistant structural steels | 0.1–0.15 | 6 |
| K21590 | 1.7380 | Heat-resistant structural steels | 0.08–0.14 | 20 |
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.