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Solder Alloy 721 vs. K93500 Alloy

Solder alloy 721 belongs to the otherwise unclassified metals classification, while K93500 alloy belongs to the iron alloys. There are 17 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is solder alloy 721 and the bottom bar is K93500 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
190
Poisson's Ratio 0.36
0.3
Shear Modulus, GPa 19
72
Tensile Strength: Ultimate (UTS), MPa 50
490 to 810

Thermal Properties

Latent Heat of Fusion, J/g 61
270
Melting Completion (Liquidus), °C 220
1430
Melting Onset (Solidus), °C 210
1380
Specific Heat Capacity, J/kg-K 220
460
Thermal Expansion, µm/m-K 22
12

Otherwise Unclassified Properties

Density, g/cm3 7.4
8.2
Embodied Carbon, kg CO2/kg material 17
4.7
Embodied Energy, MJ/kg 280
65

Common Calculations

Stiffness to Weight: Axial, points 3.8
13
Stiffness to Weight: Bending, points 17
23
Strength to Weight: Axial, points 1.9
17 to 27
Strength to Weight: Bending, points 4.1
17 to 23
Thermal Shock Resistance, points 3.2
15 to 25

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0 to 0.1
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 0.050
Chromium (Cr), % 0
0 to 0.25
Cobalt (Co), % 0
5.0
Copper (Cu), % 0.3 to 0.7
0
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
61.4 to 63
Lead (Pb), % 0 to 0.070
0
Magnesium (Mg), % 0
0 to 0.1
Manganese (Mn), % 0
0 to 0.6
Nickel (Ni), % 0 to 0.010
32
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0
0 to 0.25
Silver (Ag), % 2.3 to 2.7
0
Sulfur (S), % 0
0 to 0.015
Tin (Sn), % 95 to 96.6
0
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0 to 0.0010
0
Zirconium (Zr), % 0
0 to 0.1