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4007-O Aluminum vs. Annealed ASTM B685 Alloy

4007-O aluminum belongs to the aluminum alloys classification, while annealed ASTM B685 alloy belongs to the otherwise unclassified metals. There are 19 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 4007-O aluminum and the bottom bar is annealed ASTM B685 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
120
Elongation at Break, % 23
23
Poisson's Ratio 0.33
0.37
Shear Modulus, GPa 27
43
Shear Strength, MPa 80
410
Tensile Strength: Ultimate (UTS), MPa 130
660

Thermal Properties

Latent Heat of Fusion, J/g 410
180
Melting Completion (Liquidus), °C 650
1230
Melting Onset (Solidus), °C 590
1200
Specific Heat Capacity, J/kg-K 890
300
Thermal Expansion, µm/m-K 23
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 42
5.0
Electrical Conductivity: Equal Weight (Specific), % IACS 140
4.1

Otherwise Unclassified Properties

Density, g/cm3 2.8
11

Common Calculations

Stiffness to Weight: Axial, points 14
6.1
Stiffness to Weight: Bending, points 49
15
Strength to Weight: Axial, points 12
17
Strength to Weight: Bending, points 20
16
Thermal Shock Resistance, points 5.5
28

Alloy Composition

Aluminum (Al), % 94.1 to 97.6
0 to 0.0050
Cadmium (Cd), % 0
0 to 0.050
Chromium (Cr), % 0.050 to 0.25
0
Cobalt (Co), % 0 to 0.050
0
Copper (Cu), % 0 to 0.2
39.5 to 40.5
Iron (Fe), % 0.4 to 1.0
0 to 0.050
Lead (Pb), % 0
0 to 0.030
Magnesium (Mg), % 0 to 0.2
0
Manganese (Mn), % 0.8 to 1.5
0
Nickel (Ni), % 0.15 to 0.7
0
Palladium (Pd), % 0
59 to 60.5
Silicon (Si), % 1.0 to 1.7
0
Silver (Ag), % 0
0 to 0.1
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.1
0 to 0.060
Residuals, % 0
0 to 0.2