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C52400 Bronze vs. 85-platinum 15-iridium

C52400 bronze belongs to the copper alloys classification, while 85-platinum 15-iridium belongs to the otherwise unclassified metals. There are 17 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 C52400 bronze and the bottom bar is 85-platinum 15-iridium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
220
Poisson's Ratio 0.34
0.38
Shear Modulus, GPa 41
81
Tensile Strength: Ultimate (UTS), MPa 450 to 880
560 to 730

Thermal Properties

Latent Heat of Fusion, J/g 190
110
Melting Completion (Liquidus), °C 1000
1820
Melting Onset (Solidus), °C 840
1790
Specific Heat Capacity, J/kg-K 370
130
Thermal Expansion, µm/m-K 18
8.4

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
6.2
Electrical Conductivity: Equal Weight (Specific), % IACS 11
2.6

Otherwise Unclassified Properties

Density, g/cm3 8.8
22

Common Calculations

Stiffness to Weight: Axial, points 6.9
5.7
Stiffness to Weight: Bending, points 18
9.3
Strength to Weight: Axial, points 14 to 28
7.1 to 9.3
Strength to Weight: Bending, points 15 to 23
6.9 to 8.3
Thermal Shock Resistance, points 17 to 32
21 to 28

Alloy Composition

Copper (Cu), % 87.8 to 91
0
Iridium (Ir), % 0
14.5 to 15.5
Iron (Fe), % 0 to 0.1
0
Lead (Pb), % 0 to 0.050
0
Phosphorus (P), % 0.030 to 0.35
0
Platinum (Pt), % 0
84.3 to 85.5
Tin (Sn), % 9.0 to 11
0
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0
0 to 0.2