Work Hardened 90-platinum 10-iridium vs. Work Hardened ASTM B685 Alloy
Both work hardened 90-platinum 10-iridium and work hardened ASTM B685 alloy are otherwise unclassified metals. Both are furnished in the cold worked (strain hardened) condition. There are 14 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is work hardened 90-platinum 10-iridium and the bottom bar is work hardened ASTM B685 alloy.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 120 |
| Poisson's Ratio | 0.38 | |
| 0.37 |
| Shear Modulus, GPa | 74 | |
| 43 |
| Tensile Strength: Ultimate (UTS), MPa | 550 | |
| 1060 |
Thermal Properties
| Latent Heat of Fusion, J/g | 100 | |
| 180 |
| Melting Completion (Liquidus), °C | 1830 | |
| 1230 |
| Specific Heat Capacity, J/kg-K | 130 | |
| 300 |
| Thermal Expansion, µm/m-K | 8.6 | |
| 14 |
Otherwise Unclassified Properties
| Density, g/cm3 | 22 | |
| 11 |
Common Calculations
| Stiffness to Weight: Axial, points | 5.3 | |
| 6.1 |
| Stiffness to Weight: Bending, points | 9.1 | |
| 15 |
| Strength to Weight: Axial, points | 7.1 | |
| 27 |
| Strength to Weight: Bending, points | 6.9 | |
| 21 |
| Thermal Shock Resistance, points | 22 | |
| 46 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.0050 |
| Cadmium (Cd), % | 0 | |
| 0 to 0.050 |
| Copper (Cu), % | 0 | |
| 39.5 to 40.5 |
| Iridium (Ir), % | 9.5 to 10.5 | |
| 0 |
| Iron (Fe), % | 0 | |
| 0 to 0.050 |
| Lead (Pb), % | 0 | |
| 0 to 0.030 |
| Palladium (Pd), % | 0 | |
| 59 to 60.5 |
| Platinum (Pt), % | 89.3 to 90.5 | |
| 0 |
| Silver (Ag), % | 0 | |
| 0 to 0.1 |
| Zinc (Zn), % | 0 | |
| 0 to 0.060 |
| Residuals, % | 0 | |
| 0 to 0.2 |