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Annealed ASTM B628 vs. Annealed ASTM B780 Alloy

Both annealed ASTM B628 and annealed ASTM B780 alloy are otherwise unclassified metals. Both are furnished in the annealed condition. They have a very high 97% of their average alloy composition in common. There are 18 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is annealed ASTM B628 and the bottom bar is annealed ASTM B780 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
83
Elongation at Break, % 17
9.1
Poisson's Ratio 0.36
0.36
Shear Modulus, GPa 31
30
Shear Strength, MPa 210
200
Tensile Strength: Ultimate (UTS), MPa 350
330

Thermal Properties

Latent Heat of Fusion, J/g 140
140
Melting Completion (Liquidus), °C 780
860
Specific Heat Capacity, J/kg-K 280
270
Thermal Expansion, µm/m-K 19
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 84
76
Electrical Conductivity: Equal Weight (Specific), % IACS 75
68

Otherwise Unclassified Properties

Density, g/cm3 10
10

Common Calculations

Stiffness to Weight: Axial, points 4.6
4.5
Stiffness to Weight: Bending, points 14
14
Strength to Weight: Axial, points 9.5
9.1
Strength to Weight: Bending, points 11
11
Thermal Shock Resistance, points 16
16

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0
Cadmium (Cd), % 0 to 0.050
0 to 0.050
Copper (Cu), % 26.6 to 29
23.5 to 25.7
Iron (Fe), % 0 to 0.050
0 to 0.050
Lead (Pb), % 0 to 0.030
0 to 0.030
Nickel (Ni), % 0 to 0.010
0.35 to 0.65
Phosphorus (P), % 0 to 0.030
0
Silver (Ag), % 71 to 73
74 to 76
Zinc (Zn), % 0 to 0.060
0 to 0.060
Residuals, % 0 to 0.21
0