85-platinum 15-iridium vs. ASTM B631 Class B
Both 85-platinum 15-iridium and ASTM B631 class B are otherwise unclassified metals. There are 12 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.
For each property being compared, the top bar is 85-platinum 15-iridium and the bottom bar is ASTM B631 class B.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 210 |
| Poisson's Ratio | 0.38 | |
| 0.31 |
| Shear Modulus, GPa | 81 | |
| 78 to 79 |
Thermal Properties
| Latent Heat of Fusion, J/g | 110 | |
| 150 |
| Melting Completion (Liquidus), °C | 1820 | |
| 2460 to 2480 |
| Specific Heat Capacity, J/kg-K | 130 | |
| 170 |
| Thermal Expansion, µm/m-K | 8.4 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 6.2 | |
| 50 to 53 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.6 | |
| 32 to 34 |
Otherwise Unclassified Properties
| Density, g/cm3 | 22 | |
| 14 |
Common Calculations
| Stiffness to Weight: Axial, points | 5.7 | |
| 8.1 |
| Stiffness to Weight: Bending, points | 9.3 | |
| 14 |