Annealed 85-platinum 15-iridium vs. Annealed Silver
Both annealed 85-platinum 15-iridium and annealed silver are otherwise unclassified metals. Both are furnished in the annealed condition. There are 19 material properties with values for both materials. Properties with values for just one material (2, 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 annealed silver.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 71 |
| Elongation at Break, % | 34 | |
| 29 |
| Poisson's Ratio | 0.38 | |
| 0.37 |
| Shear Modulus, GPa | 81 | |
| 26 |
| Shear Strength, MPa | 370 | |
| 120 |
| Tensile Strength: Ultimate (UTS), MPa | 560 | |
| 190 |
Thermal Properties
| Latent Heat of Fusion, J/g | 110 | |
| 110 |
| Melting Completion (Liquidus), °C | 1820 | |
| 960 |
| Melting Onset (Solidus), °C | 1790 | |
| 960 |
| Specific Heat Capacity, J/kg-K | 130 | |
| 240 |
| Thermal Expansion, µm/m-K | 8.4 | |
| 20 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 6.2 | |
| 100 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.6 | |
| 87 |
Otherwise Unclassified Properties
| Density, g/cm3 | 22 | |
| 10 |
Common Calculations
| Stiffness to Weight: Axial, points | 5.7 | |
| 3.8 |
| Stiffness to Weight: Bending, points | 9.3 | |
| 13 |
| Strength to Weight: Axial, points | 7.1 | |
| 4.9 |
| Strength to Weight: Bending, points | 6.9 | |
| 6.9 |
| Thermal Shock Resistance, points | 21 | |
| 9.5 |
Alloy Composition
| Iridium (Ir), % | 14.5 to 15.5 | |
| 0 |
| Platinum (Pt), % | 84.3 to 85.5 | |
| 0 |
| Silver (Ag), % | 0 | |
| 99.9 to 100 |
| Residuals, % | 0 | |
| 0 to 0.1 |