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C67600 Bronze vs. 90-platinum 10-iridium

C67600 bronze belongs to the copper alloys classification, while 90-platinum 10-iridium belongs to the otherwise unclassified metals. There are 15 material properties with values for both materials. Properties with values for just one material (14, 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 C67600 bronze and the bottom bar is 90-platinum 10-iridium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
200
Elongation at Break, % 13 to 33
5.5 to 34
Poisson's Ratio 0.31
0.38
Shear Modulus, GPa 40
74
Shear Strength, MPa 270 to 350
220 to 320
Tensile Strength: Ultimate (UTS), MPa 430 to 570
330 to 550

Thermal Properties

Latent Heat of Fusion, J/g 170
100
Specific Heat Capacity, J/kg-K 380
130
Thermal Expansion, µm/m-K 21
8.6

Otherwise Unclassified Properties

Density, g/cm3 8.0
22

Common Calculations

Stiffness to Weight: Axial, points 7.2
5.3
Stiffness to Weight: Bending, points 20
9.1
Strength to Weight: Axial, points 15 to 20
4.2 to 7.1
Strength to Weight: Bending, points 16 to 19
4.9 to 6.9
Thermal Shock Resistance, points 14 to 19
13 to 22

Alloy Composition

Copper (Cu), % 57 to 60
0
Iridium (Ir), % 0
9.5 to 10.5
Iron (Fe), % 0.4 to 1.3
0
Lead (Pb), % 0.5 to 1.0
0
Manganese (Mn), % 0.050 to 0.5
0
Platinum (Pt), % 0
89.3 to 90.5
Tin (Sn), % 0.5 to 1.5
0
Zinc (Zn), % 35.2 to 41.6
0
Residuals, % 0
0 to 0.2