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Solder Alloy 703 vs. AWS BAu-3

Both solder alloy 703 and AWS BAu-3 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.

For each property being compared, the top bar is solder alloy 703 and the bottom bar is AWS BAu-3.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
110
Poisson's Ratio 0.36
0.37
Shear Modulus, GPa 19
41
Tensile Strength: Ultimate (UTS), MPa 57
220

Thermal Properties

Latent Heat of Fusion, J/g 61
160
Melting Completion (Liquidus), °C 220
1030
Melting Onset (Solidus), °C 220
970
Specific Heat Capacity, J/kg-K 220
300
Thermal Expansion, µm/m-K 22
16

Otherwise Unclassified Properties

Density, g/cm3 7.4
13

Common Calculations

Stiffness to Weight: Axial, points 3.8
5.0
Stiffness to Weight: Bending, points 17
13
Strength to Weight: Axial, points 2.1
4.9
Strength to Weight: Bending, points 4.4
6.4
Thermal Shock Resistance, points 3.7
8.7

Alloy Composition


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Aluminum (Al), % 0 to 0.0010
0
Antimony (Sb), % 0 to 0.1
0
Arsenic (As), % 0 to 0.030
0
Bismuth (Bi), % 0 to 0.1
0
Cadmium (Cd), % 0 to 0.0020
0
Copper (Cu), % 0 to 0.050
60.9 to 63
Gold (Au), % 0 to 0.050
34.5 to 35.5
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0
Lead (Pb), % 0 to 0.070
0
Nickel (Ni), % 0 to 0.010
2.5 to 3.5
Silver (Ag), % 3.3 to 3.7
0
Tin (Sn), % 95.8 to 96.7
0
Zinc (Zn), % 0 to 0.0010
0
Residuals, % 0
0 to 0.15