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AISI M2
Category Steel
Class Tool steel
Type Molybdenum high speed steel
Designations  France: AFNOR 06-05-04-02
Germany: DIN 1.3343
Italy: UNI KU
Japan: JIS SKH9
Sweden: SS 2722
United Kingdom: B.S. BM 2
United States: ASTM A600 , FED QQ-T-590 , SAE J437 , SAE J438 , UNS T11302

Composition
ElementWeight %
C  0.78-1.05 
Mn  0.15-0.40 
Si  0.20-0.45 
Cr  3.75-4.50 
Ni  0.3 
Mo  4.50-5.50 
W  5.50-6.75 
V  1.75-2.20 
Cu  0.25 
P  0.03 
S  0.03 

Mechanical Properties
Properties Conditions 
T (°C)Treatment
Density (×1000 kg/m3) 8.16 25  
Poisson's Ratio 0.27-0.30 25  
Elastic Modulus (GPa) 190-210 25  

Thermal Properties
Properties Conditions 
T (°C)Treatment
Thermal Expansion (10-6/ºC) 10.1  20-100 more  
Thermal Conductivity (W/m-K) 21.3  100 more  
Glossary