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Solder Alloy 712 vs. S31803 Stainless Steel

Solder alloy 712 belongs to the otherwise unclassified metals classification, while S31803 stainless steel belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is solder alloy 712 and the bottom bar is S31803 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
200
Elongation at Break, % 22
29
Poisson's Ratio 0.36
0.27
Shear Modulus, GPa 19
80
Tensile Strength: Ultimate (UTS), MPa 51
710

Thermal Properties

Latent Heat of Fusion, J/g 62
300
Melting Completion (Liquidus), °C 220
1450
Melting Onset (Solidus), °C 220
1400
Specific Heat Capacity, J/kg-K 220
480
Thermal Conductivity, W/m-K 58
16
Thermal Expansion, µm/m-K 22
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 16
2.5

Otherwise Unclassified Properties

Density, g/cm3 7.4
7.8
Embodied Carbon, kg CO2/kg material 18
3.6
Embodied Energy, MJ/kg 300
49

Common Calculations

Stiffness to Weight: Axial, points 3.8
14
Stiffness to Weight: Bending, points 17
25
Strength to Weight: Axial, points 1.9
25
Strength to Weight: Bending, points 4.1
23
Thermal Diffusivity, mm2/s 35
4.3
Thermal Shock Resistance, points 3.3
20

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
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
21 to 23
Copper (Cu), % 0.5 to 0.9
0
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
63.7 to 71.9
Lead (Pb), % 0 to 0.070
0
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 0 to 0.010
4.5 to 6.5
Nitrogen (N), % 0
0.080 to 0.2
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0 to 1.0
Silver (Ag), % 3.3 to 3.7
0
Sulfur (S), % 0
0 to 0.020
Tin (Sn), % 94.9 to 96.2
0
Zinc (Zn), % 0 to 0.0010
0