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AISI M33
Category Steel
Class Tool steel
Type Molybdenum high speed steel
Designations  Germany: DIN 1.3249
United Kingdom: B.S. BM 34
United States: ASTM A600 , FED QQ-T-590 , UNS T11333

Composition
ElementWeight %
C  0.85-0.92 
Mn  0.15-0.40 
Si  0.15-0.50 
Cr  3.50-4.00 
Ni  0.3 
Mo  9.00-10.00 
W  1.30-2.10 
V  1.00-1.35 
Co  7.75-8.75 
Cu  0.25 
P  0.03 
S  0.03 

Mechanical Properties
Properties Conditions 
T (°C)Treatment
Density (×1000 kg/m3) 8.03 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) 11  20-425 more  
Glossary