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A380.0 Aluminum vs. ASTM B685 Alloy

A380.0 aluminum belongs to the aluminum alloys classification, while ASTM B685 alloy belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (15, 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 A380.0 aluminum and the bottom bar is ASTM B685 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
120
Poisson's Ratio 0.33
0.37
Shear Modulus, GPa 27
43
Tensile Strength: Ultimate (UTS), MPa 290
660 to 1060

Thermal Properties

Latent Heat of Fusion, J/g 510
180
Melting Completion (Liquidus), °C 590
1230
Melting Onset (Solidus), °C 550
1200
Specific Heat Capacity, J/kg-K 870
300
Thermal Expansion, µm/m-K 22
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
5.0
Electrical Conductivity: Equal Weight (Specific), % IACS 78
4.1

Otherwise Unclassified Properties

Density, g/cm3 2.9
11

Common Calculations

Stiffness to Weight: Axial, points 14
6.1
Stiffness to Weight: Bending, points 48
15
Strength to Weight: Axial, points 28
17 to 27
Strength to Weight: Bending, points 34
16 to 21
Thermal Shock Resistance, points 13
28 to 46

Alloy Composition

Aluminum (Al), % 80.3 to 89.5
0 to 0.0050
Cadmium (Cd), % 0
0 to 0.050
Copper (Cu), % 3.0 to 4.0
39.5 to 40.5
Iron (Fe), % 0 to 1.3
0 to 0.050
Lead (Pb), % 0
0 to 0.030
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.5
0
Nickel (Ni), % 0 to 0.5
0
Palladium (Pd), % 0
59 to 60.5
Silicon (Si), % 7.5 to 9.5
0
Silver (Ag), % 0
0 to 0.1
Tin (Sn), % 0 to 0.35
0
Zinc (Zn), % 0 to 3.0
0 to 0.060
Residuals, % 0 to 0.5
0 to 0.2