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Solder Alloy 703 vs. ASTM B541 Gold

Both solder alloy 703 and ASTM B541 gold are otherwise unclassified metals. There are 18 material properties with values for both materials. Properties with values for just one material (10, 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 solder alloy 703 and the bottom bar is ASTM B541 gold.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
110
Elongation at Break, % 35
6.0 to 14
Poisson's Ratio 0.36
0.4
Shear Modulus, GPa 19
38
Tensile Strength: Ultimate (UTS), MPa 57
670 to 1180

Thermal Properties

Latent Heat of Fusion, J/g 61
90
Melting Completion (Liquidus), °C 220
1110
Melting Onset (Solidus), °C 220
930
Specific Heat Capacity, J/kg-K 220
170
Thermal Expansion, µm/m-K 22
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
7.7 to 12
Electrical Conductivity: Equal Weight (Specific), % IACS 17
4.0 to 6.2

Otherwise Unclassified Properties

Density, g/cm3 7.4
17

Common Calculations

Stiffness to Weight: Axial, points 3.8
3.4
Stiffness to Weight: Bending, points 17
9.0
Strength to Weight: Axial, points 2.1
11 to 19
Strength to Weight: Bending, points 4.4
9.8 to 14
Thermal Shock Resistance, points 3.7
36 to 63

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
13.5 to 15.5
Gold (Au), % 0 to 0.050
70.5 to 72.5
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
0
Platinum (Pt), % 0
8.0 to 9.0
Silver (Ag), % 3.3 to 3.7
4.0 to 5.0
Tin (Sn), % 95.8 to 96.7
0
Zinc (Zn), % 0 to 0.0010
0.7 to 1.3
Residuals, % 0
0 to 0.4