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ASTM B817 Type II vs. Solder Alloy 721

ASTM B817 type II belongs to the titanium alloys classification, while solder alloy 721 belongs to the otherwise unclassified metals. There are 18 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 ASTM B817 type II and the bottom bar is solder alloy 721.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
51
Elongation at Break, % 3.0 to 13
17
Poisson's Ratio 0.32
0.36
Shear Modulus, GPa 40
19
Tensile Strength: Ultimate (UTS), MPa 900 to 960
50

Thermal Properties

Latent Heat of Fusion, J/g 400
61
Melting Completion (Liquidus), °C 1580
220
Melting Onset (Solidus), °C 1530
210
Specific Heat Capacity, J/kg-K 550
220
Thermal Expansion, µm/m-K 9.9
22

Otherwise Unclassified Properties

Density, g/cm3 4.6
7.4
Embodied Carbon, kg CO2/kg material 40
17
Embodied Energy, MJ/kg 650
280

Common Calculations

Stiffness to Weight: Axial, points 13
3.8
Stiffness to Weight: Bending, points 34
17
Strength to Weight: Axial, points 55 to 58
1.9
Strength to Weight: Bending, points 45 to 47
4.1
Thermal Shock Resistance, points 62 to 66
3.2

Alloy Composition


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Aluminum (Al), % 5.0 to 6.0
0 to 0.0010
Antimony (Sb), % 0
0 to 0.1
Arsenic (As), % 0
0 to 0.030
Bismuth (Bi), % 0
0.8 to 1.2
Cadmium (Cd), % 0
0 to 0.0020
Carbon (C), % 0 to 0.1
0
Chlorine (Cl), % 0 to 0.2
0
Copper (Cu), % 0.35 to 1.0
0.3 to 0.7
Gold (Au), % 0
0 to 0.050
Hydrogen (H), % 0 to 0.015
0
Indium (In), % 0
0 to 0.1
Iron (Fe), % 0.35 to 1.0
0 to 0.020
Lead (Pb), % 0
0 to 0.070
Nickel (Ni), % 0
0 to 0.010
Nitrogen (N), % 0 to 0.040
0
Oxygen (O), % 0 to 0.3
0
Silicon (Si), % 0 to 0.1
0
Silver (Ag), % 0
2.3 to 2.7
Sodium (Na), % 0 to 0.2
0
Tin (Sn), % 1.5 to 2.5
95 to 96.6
Titanium (Ti), % 82.1 to 87.8
0
Vanadium (V), % 5.0 to 6.0
0
Zinc (Zn), % 0
0 to 0.0010
Residuals, % 0 to 0.4
0