High Speed Steel
T4 High Speed Steel
Cobalt-bearing tungsten high speed steel, good red hardness for demanding cutting applications.
Chemical Composition
| Element | Percentage (% by weight) |
|---|---|
| W | 17.5 - 19 |
| Co | 4.25 - 5.75 |
| Cr | 3.75 - 4.5 |
| V | 0.8 - 1.2 |
| C | 0.7 - 0.8 |
| Mo | 0.4 - 1 |
Physical Properties
- Density (kg/m³)
- 8680
- Melting point (°C)
- 1432
Heat Treatment
- Hardening
- preheat 843C, rapid heat to 1274C, quench in oil/air/salt bath
- Tempering
- 538-593C for 66-62 HRC
Typical Applications
- Cutting tools
- Cold work tooling
Buying This Grade in Pakistan
A tungsten high speed steel alternative to the molybdenum M-series grades, a smaller, more specialized order than M2 or M42, worth stocking only if there's specific demand from cutting tool manufacturers rather than as a standard-shelf item.
Grade Family
Tungsten high speed steel (Group T)
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