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90-platinum 10-iridium vs. C12900 Copper

90-platinum 10-iridium belongs to the otherwise unclassified metals classification, while C12900 copper belongs to the copper alloys. There are 15 material properties with values for both materials. Properties with values for just one material (15, 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 90-platinum 10-iridium and the bottom bar is C12900 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
120
Elongation at Break, % 5.5 to 34
2.8 to 50
Poisson's Ratio 0.38
0.34
Shear Modulus, GPa 74
43
Shear Strength, MPa 220 to 320
150 to 210
Tensile Strength: Ultimate (UTS), MPa 330 to 550
220 to 420

Thermal Properties

Latent Heat of Fusion, J/g 100
210
Specific Heat Capacity, J/kg-K 130
390
Thermal Expansion, µm/m-K 8.6
17

Otherwise Unclassified Properties

Density, g/cm3 22
9.0

Common Calculations

Stiffness to Weight: Axial, points 5.3
7.2
Stiffness to Weight: Bending, points 9.1
18
Strength to Weight: Axial, points 4.2 to 7.1
6.8 to 13
Strength to Weight: Bending, points 4.9 to 6.9
9.1 to 14
Thermal Shock Resistance, points 13 to 22
7.8 to 15

Alloy Composition

Antimony (Sb), % 0
0 to 0.0030
Arsenic (As), % 0
0 to 0.012
Bismuth (Bi), % 0
0 to 0.0030
Copper (Cu), % 0
99.88 to 100
Iridium (Ir), % 9.5 to 10.5
0
Lead (Pb), % 0
0 to 0.0040
Nickel (Ni), % 0
0 to 0.050
Platinum (Pt), % 89.3 to 90.5
0
Silver (Ag), % 0
0 to 0.054
Tellurium (Te), % 0
0 to 0.025
Residuals, % 0 to 0.2
0