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Half-hard ASTM B780 Alloy vs. Half-hard Silver

Both half-hard ASTM B780 alloy and half-hard silver are otherwise unclassified metals. Both are furnished in the half-hard temper. They have 75% of their average alloy composition in common. There are 18 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is half-hard ASTM B780 alloy and the bottom bar is half-hard silver.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
71
Elongation at Break, % 3.4
4.6
Poisson's Ratio 0.36
0.37
Shear Modulus, GPa 30
26
Shear Strength, MPa 250
150
Tensile Strength: Ultimate (UTS), MPa 440
260

Thermal Properties

Latent Heat of Fusion, J/g 140
110
Melting Completion (Liquidus), °C 860
960
Specific Heat Capacity, J/kg-K 270
240
Thermal Expansion, µm/m-K 18
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 73
100
Electrical Conductivity: Equal Weight (Specific), % IACS 65
87

Otherwise Unclassified Properties

Density, g/cm3 10
10

Common Calculations

Stiffness to Weight: Axial, points 4.5
3.8
Stiffness to Weight: Bending, points 14
13
Strength to Weight: Axial, points 12
6.9
Strength to Weight: Bending, points 13
8.7
Thermal Shock Resistance, points 21
13

Alloy Composition


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Cadmium (Cd), % 0 to 0.050
0
Copper (Cu), % 23.5 to 25.7
0
Iron (Fe), % 0 to 0.050
0
Lead (Pb), % 0 to 0.030
0
Nickel (Ni), % 0.35 to 0.65
0
Silver (Ag), % 74 to 76
99.9 to 100
Zinc (Zn), % 0 to 0.060
0
Residuals, % 0
0 to 0.1