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85-platinum 15-iridium vs. CR007A Copper

85-platinum 15-iridium belongs to the otherwise unclassified metals classification, while CR007A copper belongs to the copper alloys. There are 18 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 85-platinum 15-iridium and the bottom bar is CR007A copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
120
Elongation at Break, % 5.5 to 34
15
Poisson's Ratio 0.38
0.34
Shear Modulus, GPa 81
43
Tensile Strength: Ultimate (UTS), MPa 560 to 730
230

Thermal Properties

Latent Heat of Fusion, J/g 110
210
Melting Completion (Liquidus), °C 1820
1090
Melting Onset (Solidus), °C 1790
1040
Specific Heat Capacity, J/kg-K 130
390
Thermal Expansion, µm/m-K 8.4
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.2
100
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
100

Otherwise Unclassified Properties

Density, g/cm3 22
9.0

Common Calculations

Stiffness to Weight: Axial, points 5.7
7.2
Stiffness to Weight: Bending, points 9.3
18
Strength to Weight: Axial, points 7.1 to 9.3
7.1
Strength to Weight: Bending, points 6.9 to 8.3
9.3
Thermal Shock Resistance, points 21 to 28
8.1

Alloy Composition


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Antimony (Sb), % 0
0 to 0.00040
Arsenic (As), % 0
0 to 0.00050
Bismuth (Bi), % 0
0 to 0.00020
Copper (Cu), % 0
99.994 to 100
Iridium (Ir), % 14.5 to 15.5
0
Iron (Fe), % 0
0 to 0.0010
Lead (Pb), % 0
0 to 0.00050
Platinum (Pt), % 84.3 to 85.5
0
Selenium (Se), % 0
0 to 0.00020
Silver (Ag), % 0
0 to 0.0025
Sulfur (S), % 0
0 to 0.0015
Tellurium (Te), % 0
0 to 0.00020
Residuals, % 0 to 0.2
0