ASTM B631 Class C vs. 85-platinum 15-iridium
Both ASTM B631 class C and 85-platinum 15-iridium 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 ASTM B631 class C and the bottom bar is 85-platinum 15-iridium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 180 to 190 | |
| 220 |
| Poisson's Ratio | 0.32 | |
| 0.38 |
| Shear Modulus, GPa | 66 to 71 | |
| 81 |
Thermal Properties
| Latent Heat of Fusion, J/g | 140 to 150 | |
| 110 |
| Melting Completion (Liquidus), °C | 2090 to 2230 | |
| 1820 |
| Specific Heat Capacity, J/kg-K | 180 | |
| 130 |
| Thermal Expansion, µm/m-K | 14 | |
| 8.4 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 55 to 63 | |
| 6.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 36 to 43 | |
| 2.6 |
Otherwise Unclassified Properties
| Density, g/cm3 | 13 to 14 | |
| 22 |
Common Calculations
| Stiffness to Weight: Axial, points | 7.4 to 7.6 | |
| 5.7 |
| Stiffness to Weight: Bending, points | 14 | |
| 9.3 |