Work Hardened 85-platinum 15-iridium vs. Work Hardened 90-platinum 10-iridium
Both work hardened 85-platinum 15-iridium and work hardened 90-platinum 10-iridium are otherwise unclassified metals. Both are furnished in the cold worked (strain hardened) condition. They have a very high 95% of their average alloy composition in common. There are 16 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is work hardened 85-platinum 15-iridium and the bottom bar is work hardened 90-platinum 10-iridium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 200 |
| Elongation at Break, % | 5.5 | |
| 5.5 |
| Poisson's Ratio | 0.38 | |
| 0.38 |
| Shear Modulus, GPa | 81 | |
| 74 |
| Shear Strength, MPa | 420 | |
| 320 |
| Tensile Strength: Ultimate (UTS), MPa | 730 | |
| 550 |
Thermal Properties
| Latent Heat of Fusion, J/g | 110 | |
| 100 |
| Melting Completion (Liquidus), °C | 1820 | |
| 1830 |
| Specific Heat Capacity, J/kg-K | 130 | |
| 130 |
| Thermal Expansion, µm/m-K | 8.4 | |
| 8.6 |
Otherwise Unclassified Properties
| Density, g/cm3 | 22 | |
| 22 |
Common Calculations
| Stiffness to Weight: Axial, points | 5.7 | |
| 5.3 |
| Stiffness to Weight: Bending, points | 9.3 | |
| 9.1 |
| Strength to Weight: Axial, points | 9.3 | |
| 7.1 |
| Strength to Weight: Bending, points | 8.3 | |
| 6.9 |
| Thermal Shock Resistance, points | 28 | |
| 22 |
Alloy Composition
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| Iridium (Ir), % | 14.5 to 15.5 | |
| 9.5 to 10.5 |
| Platinum (Pt), % | 84.3 to 85.5 | |
| 89.3 to 90.5 |
| Residuals, % | 0 to 0.2 | |
| 0 to 0.2 |