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High Speed Steel
Hot Work Tool Steel
 
 
AISI D2
Category  Steel
Class  Tool steel
Type  High-carbon, high-chromium cold work steel
Designations  Germany: DIN 1.2379
Italy: UNI KU
United Kingdom: B.S. BD 2
United States: ASTM A681 , FED QQ-T-570 , SAE J437 , SAE J438 , UNS T30402
Composition
Element  Weight % 
C  1.40-1.60 
Mn  0.60 
Si  0.60 
Cr  11.00-13.00 
Ni  0.30 
Mo  0.70-1.20 
V  1.10 
Co  1.00 
Cu  0.25 
P  0.03 
S  0.03 
Mechanical Properties
Properties  Conditions 
T (°C) Treatment
Density (×1000 kg/m3)   7.7 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.  20-100 
 
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