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A380.0 Aluminum vs. 90-platinum 10-iridium

A380.0 aluminum belongs to the aluminum alloys classification, while 90-platinum 10-iridium belongs to the otherwise unclassified metals. There are 15 material properties with values for both materials. Properties with values for just one material (17, 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 90-platinum 10-iridium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
200
Elongation at Break, % 3.3
5.5 to 34
Poisson's Ratio 0.33
0.38
Shear Modulus, GPa 27
74
Shear Strength, MPa 190
220 to 320
Tensile Strength: Ultimate (UTS), MPa 290
330 to 550

Thermal Properties

Latent Heat of Fusion, J/g 510
100
Specific Heat Capacity, J/kg-K 870
130
Thermal Expansion, µm/m-K 22
8.6

Otherwise Unclassified Properties

Density, g/cm3 2.9
22

Common Calculations

Stiffness to Weight: Axial, points 14
5.3
Stiffness to Weight: Bending, points 48
9.1
Strength to Weight: Axial, points 28
4.2 to 7.1
Strength to Weight: Bending, points 34
4.9 to 6.9
Thermal Shock Resistance, points 13
13 to 22

Alloy Composition

Aluminum (Al), % 80.3 to 89.5
0
Copper (Cu), % 3.0 to 4.0
0
Iridium (Ir), % 0
9.5 to 10.5
Iron (Fe), % 0 to 1.3
0
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.5
0
Nickel (Ni), % 0 to 0.5
0
Platinum (Pt), % 0
89.3 to 90.5
Silicon (Si), % 7.5 to 9.5
0
Tin (Sn), % 0 to 0.35
0
Zinc (Zn), % 0 to 3.0
0
Residuals, % 0 to 0.5
0 to 0.2