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Solder Alloy 721 vs. N08330 Stainless Steel

Solder alloy 721 belongs to the otherwise unclassified metals classification, while N08330 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 721 and the bottom bar is N08330 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
200
Elongation at Break, % 17
34
Poisson's Ratio 0.36
0.28
Shear Modulus, GPa 19
76
Tensile Strength: Ultimate (UTS), MPa 50
550

Thermal Properties

Latent Heat of Fusion, J/g 61
310
Melting Completion (Liquidus), °C 220
1390
Melting Onset (Solidus), °C 210
1340
Specific Heat Capacity, J/kg-K 220
480
Thermal Conductivity, W/m-K 56
12
Thermal Expansion, µm/m-K 22
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 17
1.9

Otherwise Unclassified Properties

Density, g/cm3 7.4
8.0
Embodied Carbon, kg CO2/kg material 17
5.4
Embodied Energy, MJ/kg 280
77

Common Calculations

Stiffness to Weight: Axial, points 3.8
14
Stiffness to Weight: Bending, points 17
24
Strength to Weight: Axial, points 1.9
19
Strength to Weight: Bending, points 4.1
18
Thermal Diffusivity, mm2/s 34
3.1
Thermal Shock Resistance, points 3.2
13

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), % 0.8 to 1.2
0
Cadmium (Cd), % 0 to 0.0020
0
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
17 to 20
Copper (Cu), % 0.3 to 0.7
0 to 1.0
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
38.3 to 48.3
Lead (Pb), % 0 to 0.070
0 to 0.0050
Manganese (Mn), % 0
0 to 2.0
Nickel (Ni), % 0 to 0.010
34 to 37
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0.75 to 1.5
Silver (Ag), % 2.3 to 2.7
0
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 95 to 96.6
0 to 0.025
Zinc (Zn), % 0 to 0.0010
0