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AISI O7
Category Steel
Class Tool steel
Type Oil-hardening cold work steel
Designations  United States: ASTM A681 , FED QQ-T-570 , UNS T31507

Composition
ElementWeight %
C  1.10-1.30 
Mn  1.00 
Si  0.60 
Cr  0.35-0.85 
Ni  0.30 
Mo  0.30 
W  1.00-2.00 
V  0.40 
Cu  0.25 
P  0.03 
S  0.03 

Mechanical Properties
Properties Conditions 
T (°C)Treatment
Density (×1000 kg/m3) 7.8 25  
Poisson's Ratio 0.27-0.30 25  
Elastic Modulus (GPa) 190-210 25  
Glossary