KS steel grades — 823 designations — Page 10
Every grade designated under KS, with the identifying and comparative data we hold for each. 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. 9 of 50 rows differ and carry an “Indicative” mark.
Also known as
823 designations| Grade | Category | C% by weight | Also inother standards |
|---|---|---|---|
| STHA22 | — | ≤ 0.15 | — |
| STHA22 Indicative | Case hardening steels | 0.13–0.17 | 18 |
| STHA22 Indicative | Heat-resistant structural steels | 0.08–0.18 | 22 |
| STHA23 | — | ≤ 0.15 | — |
| STHA24 | — | ≤ 0.15 | — |
| STHA25 | — | ≤ 0.15 | — |
| STHA26 | — | ≤ 0.15 | — |
| STHG11 | — | ≤ 0.5 | — |
| STHG12 | — | 0.3–0.41 | — |
| STHG21 | — | 0.25–0.35 | — |
| STHG22 | — | 0.33–0.38 | — |
| STHG31 | — | 0.35–0.4 | — |
| STK290 | Unalloyed structural steels | — | 1 |
| STK400 | Unalloyed structural steels | ≤ 0.25 | 1 |
| STK490 | Unalloyed structural steels | ≤ 0.18 | 1 |
| STK500 | Unalloyed structural steels | ≤ 0.24 | 1 |
| STK540 | Unalloyed structural steels | ≤ 0.23 | 1 |
| STKM11A | Unalloyed structural steels | ≤ 0.12 | 1 |
| STKM12A | Unalloyed structural steels | ≤ 0.2 | 1 |
| STKM12B | Unalloyed structural steels | ≤ 0.2 | 1 |
| STKM12C | Unalloyed structural steels | ≤ 0.2 | 1 |
| STKM13A | Unalloyed structural steels | ≤ 0.25 | 1 |
| STKM13B | Unalloyed structural steels | ≤ 0.25 | 1 |
| STKM13C | Unalloyed structural steels | ≤ 0.25 | 1 |
| STKM14A | Unalloyed structural steels | ≤ 0.3 | 1 |
| STKM14B | Unalloyed structural steels | ≤ 0.3 | 1 |
| STKM14C | Unalloyed structural steels | ≤ 0.3 | 1 |
| STKM15A | Unalloyed structural steels | 0.25–0.35 | 1 |
| STKM15C | Unalloyed structural steels | 0.25–0.35 | 1 |
| STKM16A | Unalloyed structural steels | 0.35–0.45 | 1 |
| STKM16C | Unalloyed structural steels | 0.35–0.45 | 1 |
| STKM16C Indicative | Unalloyed structural steels | ≤ 0.2 | 22 |
| STKM16C Indicative | Unalloyed structural steels | ≤ 0.2 | 20 |
| STKM17A | Unalloyed structural steels | 0.45–0.55 | 1 |
| STKM17C | Unalloyed structural steels | 0.45–0.55 | 1 |
| STKM18A | Unalloyed structural steels | ≤ 0.18 | 1 |
| STKM18B | Unalloyed structural steels | ≤ 0.18 | 1 |
| STKM18C | Unalloyed structural steels | ≤ 0.18 | 1 |
| STKM19A | Unalloyed structural steels | ≤ 0.25 | 1 |
| STKM19C | Unalloyed structural steels | ≤ 0.25 | 1 |
| STKM19C Indicative | Unalloyed structural steels | ≤ 0.21 | 26 |
| STKM20A | Unalloyed structural steels | ≤ 0.25 | 1 |
| STR1 | Heat resistant steels | 0.4–0.5 | — |
| STR1 Indicative | Valve steels | 0.4–0.5 | 16 |
| STR1 Indicative | Others | 0.4–0.5 | 16 |
| STR11 | Heat resistant steels | 0.45–0.55 | — |
| STR21 | Heat resistant steels | ≤ 0.1 | — |
| STR21 Indicative | Heat resistant steels | ≤ 0.12 | 17 |
| STR3 | Heat resistant steels | 0.35–0.45 | — |
| STR3 Indicative | Valve steels | 0.35–0.45 | 12 |
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.