ALLOY TOOL STEELS SKS GRADE (FOR CUTTING USE)
| MATERIALS GRADE |
CHEMICAL COMPOSITION % | ||||||||
| C | Si | Mn | P | S | Ni | Cr | W | V | |
| SKS11 | 1.20~1.30 | 0.35 max. | 0.50 max. | 0.030 max. | 0.030 max. | 0.20~0.50 | 3.00~4.00 | 0.10~0.30 | |
| SKS2 | 1.00~1.10 | 0.35 max. | 0.80 max. | 0.030 max. | 0.030 max. | 0.50~1.00 | 1.00~1.50 | ||
| SKS21 | 1.00~1.10 | 0.35 max. | 0.50 max. | 0.030 max. | 0.030 max. | 0.20~0.50 | 0.50~1.00 | 0.10~0.25 | |
| SKS5 | 0.75~0.85 | 0.35 max. | 0.50 max. | 0.030 max. | 0.030 max. | 0.70~1.30 | 0.20~0.50 | ||
| SKS51 | 0.75~0.85 | 0.35 max. | 0.50 max. | 0.030 max. | 0.030 max. | 1.30~2.00 | 0.20~0.50 | ||
| SKS7 | 1.10~1.20 | 0.35 max. | 0.50 max. | 0.030 max. | 0.030 max. | 0.20~0.50 | 2.00~2.50 | ||
| SKS81 | 1.10~1.30 | 0.35 max. | 0.50 max. | 0.030 max. | 0.030 max. | 0.20~0.50 | |||
| SKS8 | 1.30~1.50 | 0.35 max. | 0.50 max. | 0.030 max. | 0.030 max. | 0.20~0.50 | |||
QUENCH-TEMPER HARDNESS (FOR CUTTING USE)
|
SKS11 SKS2 SKS21 SKS5 SKS51 SKS7 SKS81 SKS8 |
780 Water quench 830 Oil quench 820 Water quench 820 Oil quench 820 Oil quench 970 Oil quench 970 Water quench 1020 Water quench |
180 Air cooled 180 Air cooled 180 Air cooled 420 Air cooled 420 Air cooled 180 Air cooled 180 Air cooled 180 Air cooled |
62 min. 61 min. 61 min. 45 min. 45 min. 62 min. 63 min. 63 min. |