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Solder Alloy 401 vs. SAE-AISI A4 Steel

Solder alloy 401 belongs to the otherwise unclassified metals classification, while SAE-AISI A4 steel belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is solder alloy 401 and the bottom bar is SAE-AISI A4 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 50
190
Poisson's Ratio 0.36
0.29
Shear Modulus, GPa 19
73
Tensile Strength: Ultimate (UTS), MPa 29
710 to 2050

Thermal Properties

Latent Heat of Fusion, J/g 60
250
Melting Completion (Liquidus), °C 230
1450
Melting Onset (Solidus), °C 230
1410
Specific Heat Capacity, J/kg-K 220
470
Thermal Conductivity, W/m-K 66
40
Thermal Expansion, µm/m-K 22
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 17
8.6

Otherwise Unclassified Properties

Density, g/cm3 7.3
7.8
Embodied Carbon, kg CO2/kg material 15
1.8
Embodied Energy, MJ/kg 250
24
Embodied Water, L/kg 1200
59

Common Calculations

Stiffness to Weight: Axial, points 3.8
13
Stiffness to Weight: Bending, points 17
24
Strength to Weight: Axial, points 1.1
25 to 73
Strength to Weight: Bending, points 2.9
23 to 46
Thermal Diffusivity, mm2/s 40
11
Thermal Shock Resistance, points 1.9
23 to 67

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
1.0 to 1.1
Chromium (Cr), % 0
0.9 to 2.2
Copper (Cu), % 0.5 to 0.9
0 to 0.25
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
92 to 95.5
Lead (Pb), % 0 to 0.070
0
Manganese (Mn), % 0
1.8 to 2.2
Molybdenum (Mo), % 0
0.9 to 1.4
Nickel (Ni), % 0 to 0.010
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0 to 0.5
Silver (Ag), % 0 to 0.1
0
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 98.5 to 99.5
0
Zinc (Zn), % 0 to 0.0010
0