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ASTM B628 Ag-Cu vs. AZ31C Magnesium

ASTM B628 Ag-Cu belongs to the otherwise unclassified metals classification, while AZ31C magnesium belongs to the magnesium alloys. There are 19 material properties with values for both materials. Properties with values for just one material (11, 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 ASTM B628 Ag-Cu and the bottom bar is AZ31C magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
45
Elongation at Break, % 1.1 to 17
12
Poisson's Ratio 0.36
0.29
Shear Modulus, GPa 31
17
Shear Strength, MPa 210 to 430
130
Tensile Strength: Ultimate (UTS), MPa 350 to 760
260

Thermal Properties

Latent Heat of Fusion, J/g 140
350
Melting Completion (Liquidus), °C 780
600
Melting Onset (Solidus), °C 780
550
Specific Heat Capacity, J/kg-K 280
990
Thermal Expansion, µm/m-K 19
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 84
19
Electrical Conductivity: Equal Weight (Specific), % IACS 75
98

Otherwise Unclassified Properties

Density, g/cm3 10
1.7

Common Calculations

Stiffness to Weight: Axial, points 4.6
15
Stiffness to Weight: Bending, points 14
70
Strength to Weight: Axial, points 9.5 to 21
42
Strength to Weight: Bending, points 11 to 18
53
Thermal Shock Resistance, points 16 to 34
16

Alloy Composition

Aluminum (Al), % 0 to 0.0050
2.4 to 3.6
Cadmium (Cd), % 0 to 0.050
0
Copper (Cu), % 26.6 to 29
0 to 0.1
Iron (Fe), % 0 to 0.050
0
Lead (Pb), % 0 to 0.030
0
Magnesium (Mg), % 0
93.4 to 97
Manganese (Mn), % 0
0.15 to 1.0
Nickel (Ni), % 0 to 0.010
0 to 0.030
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0
0 to 0.1
Silver (Ag), % 71 to 73
0
Zinc (Zn), % 0 to 0.060
0.5 to 1.5
Residuals, % 0
0 to 0.3