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Solder Alloy 704 vs. SAE-AISI M50 Steel

Solder alloy 704 belongs to the otherwise unclassified metals classification, while SAE-AISI M50 steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is solder alloy 704 and the bottom bar is SAE-AISI M50 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
190
Poisson's Ratio 0.36
0.29
Shear Modulus, GPa 19
75
Tensile Strength: Ultimate (UTS), MPa 55
720 to 2250

Thermal Properties

Latent Heat of Fusion, J/g 62
260
Melting Completion (Liquidus), °C 240
1480
Melting Onset (Solidus), °C 220
1440
Specific Heat Capacity, J/kg-K 220
470
Thermal Conductivity, W/m-K 50
35
Thermal Expansion, µm/m-K 22
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
8.7
Electrical Conductivity: Equal Weight (Specific), % IACS 15
10

Otherwise Unclassified Properties

Density, g/cm3 7.5
7.9
Embodied Carbon, kg CO2/kg material 19
5.1
Embodied Energy, MJ/kg 320
74

Common Calculations

Stiffness to Weight: Axial, points 3.8
14
Stiffness to Weight: Bending, points 17
25
Strength to Weight: Axial, points 2.1
26 to 80
Strength to Weight: Bending, points 4.3
23 to 49
Thermal Diffusivity, mm2/s 30
9.7
Thermal Shock Resistance, points 3.5
21 to 66

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
0.78 to 0.88
Chromium (Cr), % 0
3.8 to 4.5
Copper (Cu), % 0 to 0.050
0 to 0.25
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
87 to 90.4
Lead (Pb), % 0 to 0.070
0
Manganese (Mn), % 0
0.15 to 0.45
Molybdenum (Mo), % 0
3.9 to 4.8
Nickel (Ni), % 0 to 0.010
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0.2 to 0.6
Silver (Ag), % 4.8 to 5.2
0
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 94.3 to 95.2
0
Vanadium (V), % 0
0.8 to 1.3
Zinc (Zn), % 0 to 0.0010
0