85-platinum 15-iridium vs. Grade 8 Babbitt Metal
Both 85-platinum 15-iridium and grade 8 Babbitt Metal are otherwise unclassified metals. There are 11 material properties with values for both materials. Properties with values for just one material (18, 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 85-platinum 15-iridium and the bottom bar is grade 8 Babbitt Metal.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 24 |
| Poisson's Ratio | 0.38 | |
| 0.41 |
| Shear Modulus, GPa | 81 | |
| 8.5 |
Thermal Properties
| Latent Heat of Fusion, J/g | 110 | |
| 46 |
| Melting Completion (Liquidus), °C | 1820 | |
| 270 |
| Melting Onset (Solidus), °C | 1790 | |
| 240 |
| Specific Heat Capacity, J/kg-K | 130 | |
| 150 |
| Thermal Expansion, µm/m-K | 8.4 | |
| 24 |
Otherwise Unclassified Properties
| Density, g/cm3 | 22 | |
| 10 |
Common Calculations
| Stiffness to Weight: Axial, points | 5.7 | |
| 1.3 |
| Stiffness to Weight: Bending, points | 9.3 | |
| 9.2 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.0050 |
| Antimony (Sb), % | 0 | |
| 14 to 16 |
| Arsenic (As), % | 0 | |
| 0.3 to 0.6 |
| Bismuth (Bi), % | 0 | |
| 0 to 0.1 |
| Cadmium (Cd), % | 0 | |
| 0 to 0.050 |
| Copper (Cu), % | 0 | |
| 0 to 0.5 |
| Iridium (Ir), % | 14.5 to 15.5 | |
| 0 |
| Iron (Fe), % | 0 | |
| 0 to 0.1 |
| Lead (Pb), % | 0 | |
| 77.1 to 81.2 |
| Platinum (Pt), % | 84.3 to 85.5 | |
| 0 |
| Tin (Sn), % | 0 | |
| 4.5 to 5.5 |
| Zinc (Zn), % | 0 | |
| 0 to 0.0050 |
| Residuals, % | 0 to 0.2 | |
| 0 |