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6262A Aluminum vs. 85-platinum 15-iridium

6262A aluminum belongs to the aluminum alloys classification, while 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 (11, 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 6262A aluminum and the bottom bar is 85-platinum 15-iridium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
220
Elongation at Break, % 4.5 to 11
5.5 to 34
Poisson's Ratio 0.33
0.38
Shear Modulus, GPa 26
81
Shear Strength, MPa 190 to 240
370 to 420
Tensile Strength: Ultimate (UTS), MPa 310 to 410
560 to 730

Thermal Properties

Latent Heat of Fusion, J/g 400
110
Melting Completion (Liquidus), °C 640
1820
Melting Onset (Solidus), °C 580
1790
Specific Heat Capacity, J/kg-K 890
130
Thermal Expansion, µm/m-K 23
8.4

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 45
6.2
Electrical Conductivity: Equal Weight (Specific), % IACS 140
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 31 to 41
7.1 to 9.3
Strength to Weight: Bending, points 36 to 44
6.9 to 8.3
Thermal Shock Resistance, points 14 to 18
21 to 28

Alloy Composition

Aluminum (Al), % 94.2 to 97.8
0
Bismuth (Bi), % 0.4 to 0.9
0
Chromium (Cr), % 0.040 to 0.14
0
Copper (Cu), % 0.15 to 0.4
0
Iridium (Ir), % 0
14.5 to 15.5
Iron (Fe), % 0 to 0.7
0
Magnesium (Mg), % 0.8 to 1.2
0
Manganese (Mn), % 0 to 0.15
0
Platinum (Pt), % 0
84.3 to 85.5
Silicon (Si), % 0.4 to 0.8
0
Tin (Sn), % 0.4 to 1.0
0
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0
0 to 0.2