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EN AC-71100 Aluminum vs. ASTM B685 Alloy

EN AC-71100 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 (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 EN AC-71100 aluminum and the bottom bar is ASTM B685 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
120
Poisson's Ratio 0.32
0.37
Shear Modulus, GPa 27
43
Tensile Strength: Ultimate (UTS), MPa 260
660 to 1060

Thermal Properties

Latent Heat of Fusion, J/g 490
180
Melting Completion (Liquidus), °C 580
1230
Melting Onset (Solidus), °C 520
1200
Specific Heat Capacity, J/kg-K 860
300
Thermal Expansion, µm/m-K 22
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 32
5.0
Electrical Conductivity: Equal Weight (Specific), % IACS 97
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 47
15
Strength to Weight: Axial, points 25
17 to 27
Strength to Weight: Bending, points 31
16 to 21
Thermal Shock Resistance, points 12
28 to 46

Alloy Composition

Aluminum (Al), % 78.7 to 83.3
0 to 0.0050
Cadmium (Cd), % 0
0 to 0.050
Copper (Cu), % 0 to 0.1
39.5 to 40.5
Iron (Fe), % 0 to 0.3
0 to 0.050
Lead (Pb), % 0
0 to 0.030
Magnesium (Mg), % 0.2 to 0.5
0
Manganese (Mn), % 0 to 0.15
0
Palladium (Pd), % 0
59 to 60.5
Silicon (Si), % 7.5 to 9.5
0
Silver (Ag), % 0
0 to 0.1
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 9.0 to 10.5
0 to 0.060
Residuals, % 0
0 to 0.2