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AISI H26
Category Steel
Class Tool steel
Type Tungsten hot work steel
Designations  United States: ASTM A681 , FED QQ-T-570 , UNS T20826

Composition
ElementWeight %
C  0.45-0.55 
Mn  0.15-0.40 
Si  0.15-0.40 
Cr  3.75-4.50 
Ni  0.3 
W  17.25-19.00 
V  0.75-1.25 
Cu  0.25 
P  0.03 
S  0.03 

Mechanical Properties
Properties Conditions 
T (°C)Treatment
Density (×1000 kg/m3) 8.67 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) 12.4  20-540  
Glossary