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ASTM B628 Ag-Cu vs. 7475 Aluminum

ASTM B628 Ag-Cu belongs to the otherwise unclassified metals classification, while 7475 aluminum belongs to the aluminum alloys. There are 19 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is ASTM B628 Ag-Cu and the bottom bar is 7475 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
70
Elongation at Break, % 1.1 to 17
10 to 12
Poisson's Ratio 0.36
0.32
Shear Modulus, GPa 31
26
Shear Strength, MPa 210 to 430
320 to 350
Tensile Strength: Ultimate (UTS), MPa 350 to 760
530 to 590

Thermal Properties

Latent Heat of Fusion, J/g 140
380
Melting Completion (Liquidus), °C 780
640
Melting Onset (Solidus), °C 780
480
Specific Heat Capacity, J/kg-K 280
870
Thermal Expansion, µm/m-K 19
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 84
33 to 42
Electrical Conductivity: Equal Weight (Specific), % IACS 75
98 to 120

Otherwise Unclassified Properties

Density, g/cm3 10
3.0

Common Calculations

Stiffness to Weight: Axial, points 4.6
13
Stiffness to Weight: Bending, points 14
46
Strength to Weight: Axial, points 9.5 to 21
49 to 55
Strength to Weight: Bending, points 11 to 18
48 to 52
Thermal Shock Resistance, points 16 to 34
23 to 26

Alloy Composition


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Aluminum (Al), % 0 to 0.0050
88.6 to 91.6
Cadmium (Cd), % 0 to 0.050
0
Chromium (Cr), % 0
0.18 to 0.25
Copper (Cu), % 26.6 to 29
1.2 to 1.9
Iron (Fe), % 0 to 0.050
0 to 0.12
Lead (Pb), % 0 to 0.030
0
Magnesium (Mg), % 0
1.9 to 2.6
Manganese (Mn), % 0
0 to 0.060
Nickel (Ni), % 0 to 0.010
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0
0 to 0.1
Silver (Ag), % 71 to 73
0
Titanium (Ti), % 0
0 to 0.060
Zinc (Zn), % 0 to 0.060
5.1 to 6.2
Residuals, % 0 to 0.21
0 to 0.15