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354.0 Aluminum vs. 85-platinum 15-iridium

354.0 aluminum belongs to the aluminum alloys classification, while 85-platinum 15-iridium belongs to the otherwise unclassified metals. There are 18 material properties with values for both materials. Properties with values for just one material (12, 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 354.0 aluminum and the bottom bar is 85-platinum 15-iridium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
220
Elongation at Break, % 2.4 to 3.0
5.5 to 34
Poisson's Ratio 0.33
0.38
Shear Modulus, GPa 27
81
Tensile Strength: Ultimate (UTS), MPa 360 to 380
560 to 730

Thermal Properties

Latent Heat of Fusion, J/g 530
110
Melting Completion (Liquidus), °C 600
1820
Melting Onset (Solidus), °C 550
1790
Specific Heat Capacity, J/kg-K 900
130
Thermal Expansion, µm/m-K 21
8.4

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 32
6.2
Electrical Conductivity: Equal Weight (Specific), % IACS 110
2.6

Otherwise Unclassified Properties

Density, g/cm3 2.7
22

Common Calculations

Stiffness to Weight: Axial, points 15
5.7
Stiffness to Weight: Bending, points 52
9.3
Strength to Weight: Axial, points 37 to 39
7.1 to 9.3
Strength to Weight: Bending, points 42 to 44
6.9 to 8.3
Thermal Shock Resistance, points 17 to 18
21 to 28

Alloy Composition


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Aluminum (Al), % 87.3 to 89.4
0
Copper (Cu), % 1.6 to 2.0
0
Iridium (Ir), % 0
14.5 to 15.5
Iron (Fe), % 0 to 0.2
0
Magnesium (Mg), % 0.4 to 0.6
0
Manganese (Mn), % 0 to 0.1
0
Platinum (Pt), % 0
84.3 to 85.5
Silicon (Si), % 8.6 to 9.4
0
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0 to 0.2