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6066-O Aluminum vs. Annealed 85-platinum 15-iridium

6066-O aluminum belongs to the aluminum alloys classification, while annealed 85-platinum 15-iridium belongs to the otherwise unclassified metals. There are 19 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 6066-O aluminum and the bottom bar is annealed 85-platinum 15-iridium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
220
Elongation at Break, % 17
34
Poisson's Ratio 0.33
0.38
Shear Modulus, GPa 26
81
Shear Strength, MPa 95
370
Tensile Strength: Ultimate (UTS), MPa 160
560

Thermal Properties

Latent Heat of Fusion, J/g 410
110
Melting Completion (Liquidus), °C 650
1820
Melting Onset (Solidus), °C 560
1790
Specific Heat Capacity, J/kg-K 890
130
Thermal Expansion, µm/m-K 23
8.4

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
6.2
Electrical Conductivity: Equal Weight (Specific), % IACS 130
2.6

Otherwise Unclassified Properties

Density, g/cm3 2.8
22

Common Calculations

Stiffness to Weight: Axial, points 14
5.7
Stiffness to Weight: Bending, points 49
9.3
Strength to Weight: Axial, points 16
7.1
Strength to Weight: Bending, points 23
6.9
Thermal Shock Resistance, points 6.9
21

Alloy Composition


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Aluminum (Al), % 93 to 97
0
Chromium (Cr), % 0 to 0.4
0
Copper (Cu), % 0.7 to 1.2
0
Iridium (Ir), % 0
14.5 to 15.5
Iron (Fe), % 0 to 0.5
0
Magnesium (Mg), % 0.8 to 1.4
0
Manganese (Mn), % 0.6 to 1.1
0
Platinum (Pt), % 0
84.3 to 85.5
Silicon (Si), % 0.9 to 1.8
0
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0 to 0.2