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ASTM AZ91B-F
Category Magnesium Alloy
Designations United States: UNS S21800, ASTM A276, ASTM A580

Composition
ElementWeight %
Al  9.00 
Mn  0.13 
Zn  0.70 
Cu  0.30 

Mechanical Properties
Properties Conditions 
T (°C)Treatment
Density (×1000 kg/m3) 1.81 25  
Poisson's Ratio 0.35 25  
Elastic Modulus (GPa) 44.8 25  
Tensile Strength (Mpa) 230.0  25  F (die casting) 
Yield Strength (Mpa) 150.0 (165.0) 
Elongation (%) 3.0 
Reduction in Area (%)  
Note: Value in parentheses indicates yield strength for compression.
Hardness (HB500) 63  25  F (die casting) 
Shear Strength (MPa) 140  25  F (die casting) 

Thermal Properties
Properties Conditions 
T (°C)Treatment
Thermal Expansion (10-6/ºC) 26  20-100
Thermal Conductivity (W/m-K) 71.13  0 
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