The chart below shows our high speed steel heat treating process for all of our different grades of steel. Click on the individual grade for a complete data sheet of each of our high speed steels.
| Annealing | Preheat | Austienitizing | Quench | Tempering | |
|---|---|---|---|---|---|
| Temp | Temp | Temp | Medium | Temp | |
| °F | °F | °F | °F | ||
| M2 | 1550/1600 | 1500/1550 | 2175/2225 | Salt/Oil/Atm | 1025/1050 |
| M3 | 1550/1600 | 1500/1550 | 2185/2210 | Salt/Oil/Atm | 1025/1050 |
| M4 | 1550/1600 | 1500/1550 | 2175/2225 | Salt/Oil/Atm | 1025/1050 |
| M7 | 1550/1600 | 1550/1600 | 2175/2220 | Salt/Oil/Atm | 1025/1050 |
| M42 | 1575/1650 | 1500/1550 | 2125/2175 | Salt/Oil/Atm | 1025/1050 |
| PM M4 | 1550/1600 | 1500/1550 | 2175/2220 | Salt/Oil/Atm | 1025/1050 |
| PM T15 | 1550/1600 | 1500/1550 | 2200/2250 | Salt/Oil/Atm | 1025/1050 |
| PM M48 | 1550/1600 | 1500/1550 | 2150/2175 | Salt/Oil/Atm | 1080 |
| PM A11 | 1600 | 1500/1550 | 1850/2150 | Salt/Oil/Atm | 1040 |