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AISI D7
Category Steel
Class Tool steel
Type High-carbon, high-chromium cold work steel
Designations  United States: ASTM A681 , FED QQ-T-570 , SAE J437 , SAE J438 , UNS T30407

Composition
ElementWeight %
C  2.15-2.50 
Mn  0.60 
Si  0.60 
Cr  11.50-13.50 
Ni  0.30 
Mo  0.70-1.20 
V  3.80-4.40 
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