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High speed tool steel comprises a set of tool steel alloys named for their capacity to cut materials faster than traditional high-carbon steels previously used in cutting tools.
| ASTM | DIN | JIS | C | Si | Mn | P | S | Cr | Mo | V | W | Co |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M2 | 1.3343 | SKH51 | 0.78~0.88 | 0.20~0.45 | 0.15~0.40 | 0.030 Max | 0.030 Max | 3.75~4.50 | 4.50~5.50 | 1.75~2.20 | 5.50~6.75 | - |
| M35 | 1.3243 | SKH55 | 0.82~0.95 | 0.2~0.45 | 0.15~0.4 | 0.030 Max | 0.030 Max | 3.8~4.5 | 4.75~5.25 | 1.75~2.15 | 5.5~6.5 | 4.6~5 |
| M42 | 1.3247 | SKH59 | 1.05~1.15 | 0.15~0.65 | 0.15~0.4 | 0.030 Max | 0.030 Max | 3.5~4.25 | 9~10 | 0.95~1.35 | 1.15~1.85 | 7.75~8.75 |
| Category | AISI | DIN | JIS | Stock | Application |
|---|---|---|---|---|---|
| Hot Work Tool Steel | H11 | 1.2343 | SKD6 | √ | Die Casting Dies, Extrusion Dies, Hammer Dies, Forging Dies etc. |
| H13 | 1.2344 | SKD61 | √ | ||
| Cold Work Tool Steel | D2 | 1.2379 | SKD11 | √ | Cutting Tools, Punching Tools, Shear Blades, Thread Rolling Dies etc. |
| O1 | 1.2510 | SKS3 | √ | ||
| Plastic Mould Steel | P20 | 1.2311 | -- | √ | Mold Base, Core & Cavity, Bumper Mold etc. |
| 420 | 1.2083 | SUS420J2 | √ | ||
| Alloy Steel | 4140 | 1.7225 | SCM440 | √ | Shafts, Gears, Bolts, Nuts, Crankshafts etc. |