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AZ81A Magnesium vs. ASTM B563 Pd-Ag-Cu

AZ81A magnesium belongs to the magnesium alloys classification, while ASTM B563 Pd-Ag-Cu belongs to the otherwise unclassified metals. There are 19 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is AZ81A magnesium and the bottom bar is ASTM B563 Pd-Ag-Cu.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
100
Elongation at Break, % 3.0 to 8.8
7.0 to 17
Poisson's Ratio 0.29
0.37
Shear Modulus, GPa 18
37
Shear Strength, MPa 91 to 130
470 to 690
Tensile Strength: Ultimate (UTS), MPa 160 to 240
760 to 1170

Thermal Properties

Latent Heat of Fusion, J/g 350
150
Melting Completion (Liquidus), °C 600
1180
Melting Onset (Solidus), °C 500
1030
Specific Heat Capacity, J/kg-K 990
260
Thermal Expansion, µm/m-K 27
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
5.6 to 6.7
Electrical Conductivity: Equal Weight (Specific), % IACS 65
4.6 to 5.5

Otherwise Unclassified Properties

Density, g/cm3 1.7
11

Common Calculations

Stiffness to Weight: Axial, points 15
5.2
Stiffness to Weight: Bending, points 70
14
Strength to Weight: Axial, points 26 to 39
19 to 30
Strength to Weight: Bending, points 38 to 50
17 to 22
Thermal Shock Resistance, points 9.1 to 14
39 to 61

Alloy Composition


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Aluminum (Al), % 7.0 to 8.1
0
Copper (Cu), % 0 to 0.1
15.5 to 16.5
Magnesium (Mg), % 89.8 to 92.5
0
Manganese (Mn), % 0.13 to 0.35
0
Nickel (Ni), % 0 to 0.010
0.8 to 1.2
Palladium (Pd), % 0
43 to 45
Platinum (Pt), % 0
0.8 to 1.2
Silicon (Si), % 0 to 0.3
0
Silver (Ag), % 0
37 to 39
Zinc (Zn), % 0.4 to 1.0
0
Residuals, % 0 to 0.3
0 to 0.4