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Solder Alloy 721 vs. Titanium 4-4-2

Solder alloy 721 belongs to the otherwise unclassified metals classification, while titanium 4-4-2 belongs to the titanium alloys. There are 20 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 solder alloy 721 and the bottom bar is titanium 4-4-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
110
Elongation at Break, % 17
10
Poisson's Ratio 0.36
0.32
Shear Modulus, GPa 19
42
Tensile Strength: Ultimate (UTS), MPa 50
1150 to 1250

Thermal Properties

Latent Heat of Fusion, J/g 61
410
Melting Completion (Liquidus), °C 220
1610
Melting Onset (Solidus), °C 210
1560
Specific Heat Capacity, J/kg-K 220
540
Thermal Conductivity, W/m-K 56
6.7
Thermal Expansion, µm/m-K 22
8.6

Otherwise Unclassified Properties

Density, g/cm3 7.4
4.7
Embodied Carbon, kg CO2/kg material 17
30
Embodied Energy, MJ/kg 280
480

Common Calculations

Stiffness to Weight: Axial, points 3.8
13
Stiffness to Weight: Bending, points 17
34
Strength to Weight: Axial, points 1.9
68 to 74
Strength to Weight: Bending, points 4.1
52 to 55
Thermal Diffusivity, mm2/s 34
2.6
Thermal Shock Resistance, points 3.2
86 to 93

Alloy Composition

Aluminum (Al), % 0 to 0.0010
3.0 to 5.0
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
Copper (Cu), % 0.3 to 0.7
0
Gold (Au), % 0 to 0.050
0
Hydrogen (H), % 0
0 to 0.015
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0 to 0.2
Lead (Pb), % 0 to 0.070
0
Molybdenum (Mo), % 0
3.0 to 5.0
Nickel (Ni), % 0 to 0.010
0
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.25
Silicon (Si), % 0
0.3 to 0.7
Silver (Ag), % 2.3 to 2.7
0
Tin (Sn), % 95 to 96.6
1.5 to 2.5
Titanium (Ti), % 0
85.8 to 92.2
Zinc (Zn), % 0 to 0.0010
0
Residuals, % 0
0 to 0.4