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85-platinum 15-iridium vs. Z40301 Zinc

85-platinum 15-iridium belongs to the otherwise unclassified metals classification, while Z40301 zinc belongs to the zinc 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 Z40301 zinc.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
87
Elongation at Break, % 5.5 to 34
60
Poisson's Ratio 0.38
0.25
Shear Modulus, GPa 81
35
Tensile Strength: Ultimate (UTS), MPa 560 to 730
190

Thermal Properties

Latent Heat of Fusion, J/g 110
110
Melting Completion (Liquidus), °C 1820
410
Melting Onset (Solidus), °C 1790
400
Specific Heat Capacity, J/kg-K 130
390
Thermal Expansion, µm/m-K 8.4
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.2
27
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
37

Otherwise Unclassified Properties

Density, g/cm3 22
6.6

Common Calculations

Stiffness to Weight: Axial, points 5.7
7.4
Stiffness to Weight: Bending, points 9.3
23
Strength to Weight: Axial, points 7.1 to 9.3
7.9
Strength to Weight: Bending, points 6.9 to 8.3
11
Thermal Shock Resistance, points 21 to 28
5.9

Alloy Composition

Aluminum (Al), % 0
0 to 0.010
Cadmium (Cd), % 0
0 to 0.0050
Copper (Cu), % 0
0.5 to 1.0
Iridium (Ir), % 14.5 to 15.5
0
Iron (Fe), % 0
0 to 0.010
Lead (Pb), % 0
0 to 0.010
Platinum (Pt), % 84.3 to 85.5
0
Tin (Sn), % 0
0 to 0.0030
Titanium (Ti), % 0
0 to 0.040
Zinc (Zn), % 0
98.9 to 99.5
Residuals, % 0 to 0.2
0