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5040 Aluminum vs. 90-platinum 10-iridium

5040 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 (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 5040 aluminum and the bottom bar is 90-platinum 10-iridium.

5040 (AlMg1.5Mn, A95040) Aluminum90-Platinum 10-Iridium Electrical Contact Alloy
Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 5.7 to 6.8
5.5 to 34
Poisson's Ratio 0.33
0.38
Shear Modulus, GPa 26
74
Shear Strength, MPa 140 to 150
220 to 320
Tensile Strength: Ultimate (UTS), MPa 240 to 260
330 to 550

Thermal Properties

Latent Heat of Fusion, J/g 400
100
Specific Heat Capacity, J/kg-K 900
130
Thermal Expansion, µm/m-K 23
8.6

Otherwise Unclassified Properties

Density, g/cm3 2.8
22

Common Calculations

Stiffness to Weight: Axial, points 14
5.3
Stiffness to Weight: Bending, points 50
9.1
Strength to Weight: Axial, points 24 to 26
4.2 to 7.1
Strength to Weight: Bending, points 31 to 32
4.9 to 6.9
Thermal Shock Resistance, points 10 to 11
13 to 22

Alloy Composition

Aluminum (Al), % 95.2 to 98
0
Chromium (Cr), % 0.1 to 0.3
0
Copper (Cu), % 0 to 0.25
0
Iridium (Ir), % 0
9.5 to 10.5
Iron (Fe), % 0 to 0.7
0
Magnesium (Mg), % 1.0 to 1.5
0
Manganese (Mn), % 0.9 to 1.4
0
Platinum (Pt), % 0
89.3 to 90.5
Silicon (Si), % 0 to 0.3
0
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0
0 to 0.2