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85-platinum 15-iridium vs. C94300 Bronze

85-platinum 15-iridium belongs to the otherwise unclassified metals classification, while C94300 bronze 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 C94300 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
87
Elongation at Break, % 5.5 to 34
9.7
Poisson's Ratio 0.38
0.36
Shear Modulus, GPa 81
32
Tensile Strength: Ultimate (UTS), MPa 560 to 730
180

Thermal Properties

Latent Heat of Fusion, J/g 110
150
Melting Completion (Liquidus), °C 1820
820
Melting Onset (Solidus), °C 1790
760
Specific Heat Capacity, J/kg-K 130
320
Thermal Expansion, µm/m-K 8.4
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.2
9.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
8.7

Otherwise Unclassified Properties

Density, g/cm3 22
9.3

Common Calculations

Stiffness to Weight: Axial, points 5.7
5.2
Stiffness to Weight: Bending, points 9.3
16
Strength to Weight: Axial, points 7.1 to 9.3
5.2
Strength to Weight: Bending, points 6.9 to 8.3
7.4
Thermal Shock Resistance, points 21 to 28
7.1

Alloy Composition

Aluminum (Al), % 0
0 to 0.0050
Antimony (Sb), % 0
0 to 0.8
Copper (Cu), % 0
67 to 72
Iridium (Ir), % 14.5 to 15.5
0
Iron (Fe), % 0
0 to 0.15
Lead (Pb), % 0
23 to 27
Nickel (Ni), % 0
0 to 1.0
Phosphorus (P), % 0
0 to 1.5
Platinum (Pt), % 84.3 to 85.5
0
Silicon (Si), % 0
0 to 0.0050
Sulfur (S), % 0
0 to 0.080
Tin (Sn), % 0
4.5 to 6.0
Zinc (Zn), % 0
0 to 0.8
Residuals, % 0
0 to 1.0