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AWS BAu-2 vs. Solder Alloy 811

Both AWS BAu-2 and solder alloy 811 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. There are 15 material properties with values for both materials. Properties with values for just one material (9, 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 AWS BAu-2 and the bottom bar is solder alloy 811.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
52
Poisson's Ratio 0.4
0.35
Shear Modulus, GPa 36
19
Tensile Strength: Ultimate (UTS), MPa 150
53

Thermal Properties

Latent Heat of Fusion, J/g 92
63
Melting Completion (Liquidus), °C 890
200
Melting Onset (Solidus), °C 890
190
Specific Heat Capacity, J/kg-K 180
230
Thermal Expansion, µm/m-K 15
22

Otherwise Unclassified Properties

Density, g/cm3 17
7.3

Common Calculations

Stiffness to Weight: Axial, points 3.3
4.0
Stiffness to Weight: Bending, points 9.1
17
Strength to Weight: Axial, points 2.4
2.0
Strength to Weight: Bending, points 3.6
4.3
Thermal Shock Resistance, points 7.1
3.3

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
2.8 to 3.2
Cadmium (Cd), % 0
0 to 0.0020
Copper (Cu), % 19.4 to 20.5
0 to 0.050
Gold (Au), % 79.5 to 80.5
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), % 0
0 to 0.010
Silver (Ag), % 0
0 to 0.1
Tin (Sn), % 0
87.8 to 89.7
Zinc (Zn), % 0
7.5 to 8.5
Residuals, % 0 to 0.15
0