Our M2 is a general purpose molybdenum-type high-speed steel exhibiting well-balanced toughness, wear-resistance and red hardness properties. This grade is commonly used in cold work punches and dies and cutting applications involving high-speed and light cuts. M2 high-speed steel is by far the most popular high-speed steel replacing T1 in most applications because of its superior properties such as its bending strength, toughness and thermo-plasticity—all of which are higher than T1 by 50%.
Other Known Names: HS 6-5-2, 1.3343, S600, E M2, REX M2®, SKH 51, P6M5, 6-6
Griggs Steel Color Code:Black
Broaches, Knives, Drills, Pins, Reamers, Taps, Thread roll Dies, Rolls, Mandrels, End, Mills, Rolling Racks, Milling Cutters
0.294 lb/in3 (8138 kg/m3)
Modulus Of Elasticity
30 x 106 psi (207 GPa)
50-60% of a 1% carbon steel
High Speed Steel Properties Comparison
M2 High Speed Steel Chemical Composition
M2 High Speed Steel Heat Treating
M2 High Speed Steel Thermal Treatments
For Cutting Tools:
- Furnace: 2200-2250°F (1204-1232°C)
- Salt: 2175-2225°F (1191-1218°C)
- To maximize toughness, use the lowest temperature. To maximize hot hardness, use the highest temperature.
For punches, dies, and tools that require maximum toughness without hot hardness:
- Furnace: 2075-2175°F (1175-1191°C)
- Salt: 2050-2150°F (1121-1177°C)
Heat at a rate not exceeding 400°F per hour (222°C per hour) to 1525-1550°F (829-843°C), and hold at temperature for 1 hour per inch (25.4 mm) of thickness, 2 hours minimum. Then cool slowly with the furnace at a rate not exceeding 50°F per hour (28°C per hour) to 1000°F (538°C). Continue cooling to ambient temperature in the furnace or in air.