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Solder Alloy 721 vs. AWS ERNiCrMo-4

Solder alloy 721 belongs to the otherwise unclassified metals classification, while AWS ERNiCrMo-4 belongs to the nickel alloys. There are 18 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is solder alloy 721 and the bottom bar is AWS ERNiCrMo-4.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
220
Elongation at Break, % 17
28
Poisson's Ratio 0.36
0.29
Shear Modulus, GPa 19
84
Tensile Strength: Ultimate (UTS), MPa 50
790

Thermal Properties

Latent Heat of Fusion, J/g 61
310
Melting Completion (Liquidus), °C 220
1590
Melting Onset (Solidus), °C 210
1530
Specific Heat Capacity, J/kg-K 220
410
Thermal Expansion, µm/m-K 22
12

Otherwise Unclassified Properties

Density, g/cm3 7.4
9.0
Embodied Carbon, kg CO2/kg material 17
13
Embodied Energy, MJ/kg 280
170

Common Calculations

Stiffness to Weight: Axial, points 3.8
13
Stiffness to Weight: Bending, points 17
22
Strength to Weight: Axial, points 1.9
24
Strength to Weight: Bending, points 4.1
21
Thermal Shock Resistance, points 3.2
22

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), % 0.8 to 1.2
0
Cadmium (Cd), % 0 to 0.0020
0
Carbon (C), % 0
0 to 0.020
Chromium (Cr), % 0
14.5 to 16.5
Cobalt (Co), % 0
0 to 2.5
Copper (Cu), % 0.3 to 0.7
0 to 0.5
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
4.0 to 7.0
Lead (Pb), % 0 to 0.070
0
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
15 to 17
Nickel (Ni), % 0 to 0.010
50 to 63.5
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 0.080
Silver (Ag), % 2.3 to 2.7
0
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 95 to 96.6
0
Tungsten (W), % 0
3.0 to 4.5
Vanadium (V), % 0
0 to 0.35
Zinc (Zn), % 0 to 0.0010
0
Residuals, % 0
0 to 0.5