M2 High Speed Steel is a tungsten-molybdenum high speed steel with a very much adjusted arrangement reasonable for a wide variety of uses. This grade is described by balanced combination of abrasion resistance, toughness and good red hardness. Because of its nearly low carbon content, M2 has a great mix of strength properties and abrasion resistance when properly hardened and tempered. M2 is widely used in cutting device, blade and punch and kick and die applications. World wide, the M2 type is by far the most popular high speed steel having replaced T1 high speed in most applications because of its superior properties and relative economy.
| Properties | Metric | Imperial |
|---|---|---|
| Hardness, Rockwell C (tempered at 1150°F, quenched at 2200°F) | 62 | 62 |
| Hardness, Rockwell C (as hardened, quenched at 2200°F) | 65 | 65 |
| Compressive yield strength (when tempered at 300°F) | 3250 MPa | 471000 psi |
| Izod impact unnotched (when tempered at 300°F) | 67 J | 49.4 ft-lb |
| Abrasion (loss in mm³, tempered at 1275°F; ASTM G65) | 77.7 | 77.7 |
| Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
| Elastic modulus | 190-210 GPa | 27557-30458 ksi |
| Properties | Metric | Imperial |
|---|---|---|
| CTE, linear (@20.0 – 100°C / 68.0 – 212°F) | 10 μm/m°C | 5.56 μin/in°F |
| CTE, linear (@20.0 – 500°C / 68.0 – 932°F) | 12.2 μm/m°C | 6.78 μin/in°F |
| CTE, linear (@20.0 – 850°C / 68.0 – 1560°F) | 12.6 μm/m°C | 7 μin/in°F |