AISI M2 High Speed Steel (Annealed) vs AISI M42 High Speed Steel (Annealed)
Property comparison of AISI M2 High Speed Steel (Annealed) and AISI M42 High Speed Steel (Annealed), both tool steel.
| Property | AISI M2 High Speed Steel (Annealed) | AISI M42 High Speed Steel (Annealed) | Difference |
|---|---|---|---|
| Elastic modulus | 200,000 MPa | 200,000 MPa | 0% |
| Poisson ratio | 0.285 | 0.285 | 0% |
| Density | 8,160 kg/m³ | 7,810 kg/m³ | -4% |
| Brinell hardness | 248 HB | 269 HB | +8% |
| Thermal conductivity | 21 W/m·K | 20 W/m·K | -5% |
| Coefficient of thermal expansion | 0.00001 1/K | 0.00001 1/K | 0% |
Difference is AISI M42 High Speed Steel (Annealed) relative to AISI M2 High Speed Steel (Annealed). Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
- grade
- M2
- standard
- ASTM A600
- heat treatment
- Annealed
- grade
- M42
- standard
- ASTM A600
- heat treatment
- Annealed
About M-series high-speed tool steels
M-series tool steels are molybdenum-based high-speed steels for cutting tools. They retain hardness at the temperatures generated by metal cutting (red hardness). M2 is the most common general-purpose grade; M4 trades toughness for higher wear resistance.
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