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ASTM B477 Au-Ni-Ag vs. ISO-WD32260 Magnesium

ASTM B477 Au-Ni-Ag belongs to the otherwise unclassified metals classification, while ISO-WD32260 magnesium belongs to the magnesium alloys. There are 19 material properties with values for both materials. Properties with values for just one material (12, 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 ISO-WD32260 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 95
46
Elongation at Break, % 5.5 to 11
4.5 to 6.0
Poisson's Ratio 0.41
0.29
Shear Modulus, GPa 34
18
Shear Strength, MPa 190 to 320
190 to 200
Tensile Strength: Ultimate (UTS), MPa 310 to 550
330 to 340

Thermal Properties

Latent Heat of Fusion, J/g 80
330
Melting Completion (Liquidus), °C 1010
600
Melting Onset (Solidus), °C 930
520
Specific Heat Capacity, J/kg-K 160
970
Thermal Expansion, µm/m-K 15
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
28
Electrical Conductivity: Equal Weight (Specific), % IACS 7.5
140

Otherwise Unclassified Properties

Density, g/cm3 17
1.9

Common Calculations

Stiffness to Weight: Axial, points 3.1
13
Stiffness to Weight: Bending, points 8.9
63
Strength to Weight: Axial, points 5.0 to 9.0
48 to 51
Strength to Weight: Bending, points 6.0 to 8.8
56 to 58
Thermal Shock Resistance, points 16 to 28
19 to 20

Alloy Composition

Gold (Au), % 74.2 to 75.8
0
Magnesium (Mg), % 0
92.7 to 94.8
Nickel (Ni), % 2.6 to 3.4
0
Silver (Ag), % 21.4 to 22.6
0
Zinc (Zn), % 0
4.8 to 6.2
Zirconium (Zr), % 0
0.45 to 0.8
Residuals, % 0
0 to 0.3