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Solder Alloy 702 vs. Grade 21 Titanium

Solder alloy 702 belongs to the otherwise unclassified metals classification, while grade 21 titanium 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 702 and the bottom bar is grade 21 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
140
Elongation at Break, % 21
9.0 to 17
Poisson's Ratio 0.36
0.32
Shear Modulus, GPa 19
51
Tensile Strength: Ultimate (UTS), MPa 53
890 to 1340

Thermal Properties

Latent Heat of Fusion, J/g 61
410
Melting Completion (Liquidus), °C 220
1740
Melting Onset (Solidus), °C 220
1690
Specific Heat Capacity, J/kg-K 220
500
Thermal Conductivity, W/m-K 62
7.5
Thermal Expansion, µm/m-K 22
7.1

Otherwise Unclassified Properties

Density, g/cm3 7.4
5.4
Embodied Carbon, kg CO2/kg material 17
32
Embodied Energy, MJ/kg 290
490

Common Calculations

Stiffness to Weight: Axial, points 3.8
14
Stiffness to Weight: Bending, points 17
32
Strength to Weight: Axial, points 2.0
46 to 69
Strength to Weight: Bending, points 4.2
38 to 50
Thermal Diffusivity, mm2/s 38
2.8
Thermal Shock Resistance, points 3.4
66 to 100

Alloy Composition

Aluminum (Al), % 0 to 0.0010
2.5 to 3.5
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 to 0.050
Copper (Cu), % 0 to 0.050
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 0.4
Lead (Pb), % 0 to 0.070
0
Molybdenum (Mo), % 0
14 to 16
Nickel (Ni), % 0 to 0.010
0
Niobium (Nb), % 0
2.2 to 3.2
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.17
Silicon (Si), % 0
0.15 to 0.25
Silver (Ag), % 2.8 to 3.2
0
Tin (Sn), % 96.3 to 97.2
0
Titanium (Ti), % 0
76 to 81.2
Zinc (Zn), % 0 to 0.0010
0
Residuals, % 0
0 to 0.4