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C355.0 Aluminum vs. ASTM B780 Alloy

C355.0 aluminum belongs to the aluminum alloys classification, while ASTM B780 alloy belongs to the otherwise unclassified metals. There are 16 material properties with values for both materials. Properties with values for just one material (16, 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 C355.0 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, % 2.7 to 3.8
1.1 to 9.1
Poisson's Ratio 0.33
0.36
Shear Modulus, GPa 26
30
Tensile Strength: Ultimate (UTS), MPa 290 to 310
330 to 590

Thermal Properties

Latent Heat of Fusion, J/g 470
140
Specific Heat Capacity, J/kg-K 900
270
Thermal Expansion, µm/m-K 22
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
70 to 76
Electrical Conductivity: Equal Weight (Specific), % IACS 130
62 to 68

Otherwise Unclassified Properties

Density, g/cm3 2.7
10

Common Calculations

Stiffness to Weight: Axial, points 14
4.5
Stiffness to Weight: Bending, points 51
14
Strength to Weight: Axial, points 30 to 32
9.1 to 16
Strength to Weight: Bending, points 36 to 37
11 to 15
Thermal Shock Resistance, points 13 to 14
16 to 29

Alloy Composition

Aluminum (Al), % 91.7 to 94.1
0
Cadmium (Cd), % 0
0 to 0.050
Copper (Cu), % 1.0 to 1.5
23.5 to 25.7
Iron (Fe), % 0 to 0.2
0 to 0.050
Lead (Pb), % 0
0 to 0.030
Magnesium (Mg), % 0.4 to 0.6
0
Manganese (Mn), % 0 to 0.1
0
Nickel (Ni), % 0
0.35 to 0.65
Silicon (Si), % 4.5 to 5.5
0
Silver (Ag), % 0
74 to 76
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 0 to 0.1
0 to 0.060
Residuals, % 0 to 0.15
0