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ASTM B477 Au-Ni-Ag vs. AZ92A Magnesium

ASTM B477 Au-Ni-Ag belongs to the otherwise unclassified metals classification, while AZ92A magnesium belongs to the magnesium alloys. There are 19 material properties with values for both materials. Properties with values for just one material (13, 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 B477 Au-Ni-Ag and the bottom bar is AZ92A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 95
47
Elongation at Break, % 5.5 to 11
2.1 to 6.8
Poisson's Ratio 0.41
0.29
Shear Modulus, GPa 34
18
Shear Strength, MPa 190 to 320
97 to 160
Tensile Strength: Ultimate (UTS), MPa 310 to 550
170 to 270

Thermal Properties

Latent Heat of Fusion, J/g 80
350
Melting Completion (Liquidus), °C 1010
590
Melting Onset (Solidus), °C 930
440
Specific Heat Capacity, J/kg-K 160
980
Thermal Expansion, µm/m-K 15
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
11 to 12
Electrical Conductivity: Equal Weight (Specific), % IACS 7.5
53 to 62

Otherwise Unclassified Properties

Density, g/cm3 17
1.8

Common Calculations

Stiffness to Weight: Axial, points 3.1
14
Stiffness to Weight: Bending, points 8.9
67
Strength to Weight: Axial, points 5.0 to 9.0
26 to 41
Strength to Weight: Bending, points 6.0 to 8.8
38 to 51
Thermal Shock Resistance, points 16 to 28
10 to 16

Alloy Composition

Aluminum (Al), % 0
8.3 to 9.7
Copper (Cu), % 0
0 to 0.25
Gold (Au), % 74.2 to 75.8
0
Magnesium (Mg), % 0
86.7 to 90
Manganese (Mn), % 0
0.1 to 0.35
Nickel (Ni), % 2.6 to 3.4
0 to 0.010
Silicon (Si), % 0
0 to 0.3
Silver (Ag), % 21.4 to 22.6
0
Zinc (Zn), % 0
1.6 to 2.4
Residuals, % 0
0 to 0.3