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Solder Alloy 701 vs. S40975 Stainless Steel

Solder alloy 701 belongs to the otherwise unclassified metals classification, while S40975 stainless steel belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is solder alloy 701 and the bottom bar is S40975 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
190
Elongation at Break, % 37
22
Poisson's Ratio 0.36
0.28
Shear Modulus, GPa 19
75
Tensile Strength: Ultimate (UTS), MPa 54
460

Thermal Properties

Latent Heat of Fusion, J/g 61
270
Melting Completion (Liquidus), °C 230
1450
Melting Onset (Solidus), °C 220
1400
Specific Heat Capacity, J/kg-K 220
480
Thermal Conductivity, W/m-K 52
26
Thermal Expansion, µm/m-K 22
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 17
3.3

Otherwise Unclassified Properties

Density, g/cm3 7.4
7.8
Embodied Carbon, kg CO2/kg material 18
2.0
Embodied Energy, MJ/kg 300
28

Common Calculations

Stiffness to Weight: Axial, points 3.8
14
Stiffness to Weight: Bending, points 17
25
Strength to Weight: Axial, points 2.0
17
Strength to Weight: Bending, points 4.3
17
Thermal Diffusivity, mm2/s 32
7.0
Thermal Shock Resistance, points 3.5
17

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
10.5 to 11.7
Copper (Cu), % 0 to 0.050
0
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
84.4 to 89
Lead (Pb), % 0 to 0.070
0
Manganese (Mn), % 0
0 to 1.0
Nickel (Ni), % 0 to 0.010
0.5 to 1.0
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Silver (Ag), % 3.5 to 3.9
0
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 95.6 to 96.5
0
Titanium (Ti), % 0
0 to 0.75
Zinc (Zn), % 0 to 0.0010
0