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AISI 440C Stainless Steel vs. Solder Alloy 121

AISI 440C stainless steel belongs to the iron alloys classification, while solder alloy 121 belongs to the otherwise unclassified metals. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is AISI 440C stainless steel and the bottom bar is solder alloy 121.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
21
Elongation at Break, % 2.0 to 14
25
Poisson's Ratio 0.28
0.43
Shear Modulus, GPa 76
7.5
Tensile Strength: Ultimate (UTS), MPa 710 to 1970
32

Thermal Properties

Latent Heat of Fusion, J/g 280
29
Melting Completion (Liquidus), °C 1480
290
Melting Onset (Solidus), °C 1370
230
Specific Heat Capacity, J/kg-K 480
140
Thermal Conductivity, W/m-K 22
31
Thermal Expansion, µm/m-K 10
28

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
8.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
7.4

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
80
Density, g/cm3 7.7
11
Embodied Carbon, kg CO2/kg material 2.2
5.6
Embodied Energy, MJ/kg 31
93
Embodied Water, L/kg 120
580

Common Calculations

Stiffness to Weight: Axial, points 14
1.1
Stiffness to Weight: Bending, points 25
8.6
Strength to Weight: Axial, points 26 to 71
0.84
Strength to Weight: Bending, points 23 to 46
2.1
Thermal Diffusivity, mm2/s 6.0
20
Thermal Shock Resistance, points 26 to 71
3.9

Alloy Composition

Aluminum (Al), % 0
0 to 0.0010
Antimony (Sb), % 0
0 to 0.5
Arsenic (As), % 0
0 to 0.030
Bismuth (Bi), % 0
0 to 0.25
Cadmium (Cd), % 0
0 to 0.0050
Carbon (C), % 1.0 to 1.2
0
Chromium (Cr), % 16 to 18
0
Copper (Cu), % 0
0 to 0.080
Gold (Au), % 0
0 to 0.050
Indium (In), % 0
0 to 0.1
Iron (Fe), % 78 to 83.1
0 to 0.020
Lead (Pb), % 0
83.4 to 85.5
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 0 to 0.75
0
Nickel (Ni), % 0
0 to 0.010
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0
Silver (Ag), % 0
0 to 0.1
Sulfur (S), % 0 to 0.015
0
Tin (Sn), % 0
14.5 to 15.5
Zinc (Zn), % 0
0 to 0.0010