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Annealed 85-platinum 15-iridium vs. Rolled And Annealed Type 2 Pewter

Both annealed 85-platinum 15-iridium and rolled and annealed Type 2 pewter are otherwise unclassified metals. Both are furnished in the annealed condition. There are 15 material properties with values for both materials. Properties with values for just one material (9, 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 annealed 85-platinum 15-iridium and the bottom bar is rolled and annealed Type 2 pewter.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
52
Poisson's Ratio 0.38
0.35
Shear Modulus, GPa 81
19
Tensile Strength: Ultimate (UTS), MPa 560
59

Thermal Properties

Latent Heat of Fusion, J/g 110
69
Melting Completion (Liquidus), °C 1820
300
Melting Onset (Solidus), °C 1790
240
Specific Heat Capacity, J/kg-K 130
220
Thermal Expansion, µm/m-K 8.4
21

Otherwise Unclassified Properties

Density, g/cm3 22
7.3

Common Calculations

Stiffness to Weight: Axial, points 5.7
3.9
Stiffness to Weight: Bending, points 9.3
17
Strength to Weight: Axial, points 7.1
2.3
Strength to Weight: Bending, points 6.9
4.6
Thermal Shock Resistance, points 21
3.9

Alloy Composition


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Antimony (Sb), % 0
5.0 to 7.5
Arsenic (As), % 0
0 to 0.050
Copper (Cu), % 0
1.5 to 3.0
Iridium (Ir), % 14.5 to 15.5
0
Iron (Fe), % 0
0 to 0.015
Lead (Pb), % 0
0 to 0.050
Platinum (Pt), % 84.3 to 85.5
0
Tin (Sn), % 0
90 to 93
Zinc (Zn), % 0
0 to 0.0050
Residuals, % 0 to 0.2
0