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Solder Alloy 704 vs. AWS BVAu-7

Both solder alloy 704 and AWS BVAu-7 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 704 and the bottom bar is AWS BVAu-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
130
Poisson's Ratio 0.36
0.38
Shear Modulus, GPa 19
45
Tensile Strength: Ultimate (UTS), MPa 55
200

Thermal Properties

Latent Heat of Fusion, J/g 62
140
Melting Completion (Liquidus), °C 240
1120
Melting Onset (Solidus), °C 220
1100
Specific Heat Capacity, J/kg-K 220
240
Thermal Expansion, µm/m-K 22
13

Otherwise Unclassified Properties

Density, g/cm3 7.5
15

Common Calculations

Stiffness to Weight: Axial, points 3.8
4.7
Stiffness to Weight: Bending, points 17
11
Strength to Weight: Axial, points 2.1
3.7
Strength to Weight: Bending, points 4.3
5.1
Thermal Shock Resistance, points 3.5
8.9

Alloy Composition

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 to 0.0010
Carbon (C), % 0
0 to 0.0050
Cobalt (Co), % 0
0 to 0.060
Copper (Cu), % 0 to 0.050
0
Gold (Au), % 0 to 0.050
49.5 to 50.5
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0
Lead (Pb), % 0 to 0.070
0 to 0.0020
Nickel (Ni), % 0 to 0.010
24.5 to 25.5
Palladium (Pd), % 0
23.9 to 26
Phosphorus (P), % 0
0 to 0.0020
Silver (Ag), % 4.8 to 5.2
0
Tin (Sn), % 94.3 to 95.2
0
Zinc (Zn), % 0 to 0.0010
0 to 0.0010