M-2 Tool Steel Technical Data

M-2 is a tungsten-molybdenum high-speed steel and is a popular grade for general purpose cutting and non-cutting applications. It has a wider heat-treating range than most of the molybdenum high-speed steels, coupled with a resistance to decarburization that is characteristic of tungsten types. M-2 offers an excellent combination of red hardness, toughness, and wear resistance. 

Note: K-mac does not sell this grade - Data is for reference only.

Carbon: .78 / .88

Manganese: .15 / .88

Silicon: .20 / .45

Tungsten: 5.50 / 6.00

Molybdenum: 4.50 / 5.50

Chromium: 3.75 / 4.50

Vanadium: 1.75 / 2.20

Nickel: .30 max.

Forging:  Start forging at: 1900-2100°F (1038-1149°C) Do not forge below: 1700°F (927°C)

Normalizing:  Do not normalize

Annealing:  Temperature: 1600-1650°F (871-899°C) Rate of cooling, max. per hour: 40°F (22°C) Typical annealed hardness, Brinell: 212-241

Hardening: Rate of heating: Rapidly from preheat Preheat temperature: 1350-1550°F (732-843°C) Hardening temperature: 2175-2250°F (1191-1232°C) Time at temperature, minutes: 2-5  Quenching medium: O, A, or S 

Tempering: Tempering temperature: 1000-1100°F (538-593°C) Approx. tempered hardness, Rockwell C: 60-65

Wear Resistance: Very High

Toughness: Low

Resistance to Softening Effect of Elevated Temperature: Very High

Depth of Hardening: Deep

Machinability: Medium

Grindability: Low

Distortion in Heat Treating: A/S=Low O=Medium

Safety in Hardening: Medium

Resistance to Decarburization: High

Density 0.294 lb/in3
Hardness, Brinell 217 - 255
Modulus of Elasticity 30000 ksi
Charpy Impact 25.8 ft-lb
Charpy Impact 27.3 ft-lb
Charpy Impact 30.2 ft-lb
CTE, linear 250°C 6.39 μin/in-°F
CTE, linear 500°C 6.72 μin/in-°F
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