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ASTM AZ81A-T4
Category Magnesium Alloy
Designations United States: UNS S21900, ASTM A276, ASTM A580, ASTM A412

Composition
ElementWeight %
Al  7.60 
Mn  0.13 
Zn  0.70 

Mechanical Properties
Properties Conditions 
T (°C)Treatment
Density (×1000 kg/m3) 1.8 25  
Poisson's Ratio 0.35 25  
Elastic Modulus (GPa) 44.8 25  
Tensile Strength (Mpa) 275.0  25  T4 (sand casting, permanent mold casting) 
Yield Strength (Mpa) 83.0 
Elongation (%) 15.0 
Reduction in Area (%)  
Hardness (HB500) 55  25  T4 (sand casting, permanent mold casting) 
Shear Strength (MPa) 125  25  T4 (sand casting, permanent mold casting) 

Thermal Properties
Properties Conditions 
T (°C)Treatment
Thermal Conductivity (W/m-K) 50.21  0  T4 
Glossary