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Solder Alloy 721 vs. AWS ENiCrCoMo-1

Solder alloy 721 belongs to the otherwise unclassified metals classification, while AWS ENiCrCoMo-1 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 ENiCrCoMo-1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
210
Elongation at Break, % 17
28
Poisson's Ratio 0.36
0.29
Shear Modulus, GPa 19
82
Tensile Strength: Ultimate (UTS), MPa 50
710

Thermal Properties

Latent Heat of Fusion, J/g 61
330
Melting Completion (Liquidus), °C 220
1430
Melting Onset (Solidus), °C 210
1380
Specific Heat Capacity, J/kg-K 220
440
Thermal Expansion, µm/m-K 22
13

Otherwise Unclassified Properties

Density, g/cm3 7.4
8.5
Embodied Carbon, kg CO2/kg material 17
11
Embodied Energy, MJ/kg 280
140

Common Calculations

Stiffness to Weight: Axial, points 3.8
14
Stiffness to Weight: Bending, points 17
23
Strength to Weight: Axial, points 1.9
23
Strength to Weight: Bending, points 4.1
21
Thermal Shock Resistance, points 3.2
19

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
0.050 to 0.15
Chromium (Cr), % 0
21 to 26
Cobalt (Co), % 0
9.0 to 15
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
0 to 5.0
Lead (Pb), % 0 to 0.070
0
Manganese (Mn), % 0
0.3 to 2.5
Molybdenum (Mo), % 0
8.0 to 10
Nickel (Ni), % 0 to 0.010
38.6 to 61.7
Niobium (Nb), % 0
0 to 1.0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0 to 0.75
Silver (Ag), % 2.3 to 2.7
0
Sulfur (S), % 0
0 to 0.015
Tin (Sn), % 95 to 96.6
0
Zinc (Zn), % 0 to 0.0010
0
Residuals, % 0
0 to 0.5