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ASTM B477 Au-Ni-Ag vs. Solder Alloy 502

Both ASTM B477 Au-Ni-Ag and solder alloy 502 are otherwise unclassified metals. There are 18 material properties with values for both materials. Properties with values for just one material (6, 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 solder alloy 502.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 95
53
Elongation at Break, % 5.5 to 11
34
Poisson's Ratio 0.41
0.36
Shear Modulus, GPa 34
19
Tensile Strength: Ultimate (UTS), MPa 310 to 550
58

Thermal Properties

Latent Heat of Fusion, J/g 80
66
Melting Completion (Liquidus), °C 1010
350
Melting Onset (Solidus), °C 930
220
Specific Heat Capacity, J/kg-K 160
230
Thermal Expansion, µm/m-K 15
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
12
Electrical Conductivity: Equal Weight (Specific), % IACS 7.5
15

Otherwise Unclassified Properties

Density, g/cm3 17
7.4

Common Calculations

Stiffness to Weight: Axial, points 3.1
4.0
Stiffness to Weight: Bending, points 8.9
17
Strength to Weight: Axial, points 5.0 to 9.0
2.2
Strength to Weight: Bending, points 6.0 to 8.8
4.5
Thermal Shock Resistance, points 16 to 28
3.6

Alloy Composition

Aluminum (Al), % 0
0 to 0.0010
Antimony (Sb), % 0
0 to 0.1
Arsenic (As), % 0
0 to 0.030
Bismuth (Bi), % 0
0 to 0.080
Cadmium (Cd), % 0
0 to 0.0020
Copper (Cu), % 0
3.5 to 4.5
Gold (Au), % 74.2 to 75.8
0 to 0.050
Indium (In), % 0
0 to 0.1
Iron (Fe), % 0
0 to 0.020
Lead (Pb), % 0
0 to 0.070
Nickel (Ni), % 2.6 to 3.4
0 to 0.010
Silver (Ag), % 21.4 to 22.6
0.8 to 1.2
Tin (Sn), % 0
93.8 to 95.7
Zinc (Zn), % 0
0 to 0.0010
Residuals, % 0 to 0.3
0