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S21904 Stainless Steel vs. Solder Alloy 181

S21904 stainless steel belongs to the iron alloys classification, while solder alloy 181 belongs to the otherwise unclassified metals. There are 22 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is S21904 stainless steel and the bottom bar is solder alloy 181.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
18
Elongation at Break, % 17 to 51
41
Poisson's Ratio 0.28
0.44
Shear Modulus, GPa 78
6.1
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
27

Thermal Properties

Latent Heat of Fusion, J/g 290
26
Melting Completion (Liquidus), °C 1400
310
Melting Onset (Solidus), °C 1350
300
Specific Heat Capacity, J/kg-K 480
130
Thermal Conductivity, W/m-K 14
24
Thermal Expansion, µm/m-K 17
29

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
9.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
7.4

Otherwise Unclassified Properties

Density, g/cm3 7.7
11
Embodied Carbon, kg CO2/kg material 3.0
6.2
Embodied Energy, MJ/kg 43
100

Common Calculations

Stiffness to Weight: Axial, points 14
0.86
Stiffness to Weight: Bending, points 25
7.7
Strength to Weight: Axial, points 25 to 36
0.66
Strength to Weight: Bending, points 23 to 29
1.8
Thermal Diffusivity, mm2/s 3.8
16
Thermal Shock Resistance, points 15 to 21
3.8

Alloy Composition

Aluminum (Al), % 0
0 to 0.0010
Antimony (Sb), % 0
0 to 0.2
Arsenic (As), % 0
0 to 0.030
Bismuth (Bi), % 0
0 to 0.1
Cadmium (Cd), % 0
0 to 0.0020
Carbon (C), % 0 to 0.040
0
Chromium (Cr), % 19 to 21.5
0
Copper (Cu), % 0
0 to 0.080
Gold (Au), % 0
0 to 0.050
Indium (In), % 0
0 to 0.1
Iron (Fe), % 59.5 to 67.4
0 to 0.020
Lead (Pb), % 0
96.2 to 98
Manganese (Mn), % 8.0 to 10
0
Nickel (Ni), % 5.5 to 7.5
0 to 0.010
Nitrogen (N), % 0.15 to 0.4
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
0
Silver (Ag), % 0
2.0 to 3.0
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 0.0010