High Speed Steel
M42 High Speed Steel
Cobalt addition over M2 gives higher red hardness for cutting tools used at higher speeds and temperatures.
Chemical Composition
| Element | Percentage (% by weight) |
|---|---|
| C | 1.05 - 1.15 |
| Mn | 0.15 - 0.4 |
| Si | 0.15 - 0.65 |
| Cr | 3.5 - 4.25 |
| Ni | max 0.3 |
| Mo | 9 - 10 |
| W | 1.15 - 1.85 |
| V | 0.95 - 1.35 |
| Co | 7.75 - 8.75 |
Physical Properties
- Density (kg/m³)
- 7810
Mechanical Properties
- Hardness (HRC)
- 64.3 to 65.8
Typical Applications
- High-speed cutting tools
- Tooling for hard-to-machine alloys
Buying This Grade in Pakistan
A cobalt-bearing upgrade over M2 for cutting tools used on harder materials or at higher speeds, sold into the same tool-room and regrinding shops as M2, positioned as the premium option when standard HSS tools wear out too fast.
Related reading
- Cutting tool steel for machine shops: M2, M42, and when to upgrade
M2 covers most high speed steel cutting tool needs. Here's when a Pakistani machine shop should actually pay more for M42's cobalt addition.
Grade Family
Cobalt-bearing molybdenum high speed steel
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