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AISI M34
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 T11334

Composition
ElementWeight %
C  0.85-0.92 
Mn  0.15-0.40 
Si  0.20-0.45 
Cr  3.50-4.00 
Ni  0.3 
Mo  7.75-9.20 
W  1.40-2.10 
V  1.90-2.30 
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) 7.7-8.03 25  
Poisson's Ratio 0.27-0.30 25  
Elastic Modulus (GPa) 190-210 25  
Glossary