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7475 Aluminum vs. ASTM B780 Alloy

7475 aluminum belongs to the aluminum alloys classification, while ASTM B780 alloy belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (13, 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 7475 aluminum and the bottom bar is ASTM B780 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
83
Elongation at Break, % 10 to 12
1.1 to 9.1
Poisson's Ratio 0.32
0.36
Shear Modulus, GPa 26
30
Shear Strength, MPa 320 to 350
200 to 340
Tensile Strength: Ultimate (UTS), MPa 530 to 590
330 to 590

Thermal Properties

Latent Heat of Fusion, J/g 380
140
Specific Heat Capacity, J/kg-K 870
270
Thermal Expansion, µm/m-K 23
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33 to 42
70 to 76
Electrical Conductivity: Equal Weight (Specific), % IACS 98 to 120
62 to 68

Otherwise Unclassified Properties

Density, g/cm3 3.0
10

Common Calculations

Stiffness to Weight: Axial, points 13
4.5
Stiffness to Weight: Bending, points 46
14
Strength to Weight: Axial, points 49 to 55
9.1 to 16
Strength to Weight: Bending, points 48 to 52
11 to 15
Thermal Shock Resistance, points 23 to 26
16 to 29

Alloy Composition

Aluminum (Al), % 88.6 to 91.6
0
Cadmium (Cd), % 0
0 to 0.050
Chromium (Cr), % 0.18 to 0.25
0
Copper (Cu), % 1.2 to 1.9
23.5 to 25.7
Iron (Fe), % 0 to 0.12
0 to 0.050
Lead (Pb), % 0
0 to 0.030
Magnesium (Mg), % 1.9 to 2.6
0
Manganese (Mn), % 0 to 0.060
0
Nickel (Ni), % 0
0.35 to 0.65
Silicon (Si), % 0 to 0.1
0
Silver (Ag), % 0
74 to 76
Titanium (Ti), % 0 to 0.060
0
Zinc (Zn), % 5.1 to 6.2
0 to 0.060
Residuals, % 0 to 0.15
0