90-platinum 10-iridium vs. EN 1.4740 Stainless Steel
90-platinum 10-iridium belongs to the otherwise unclassified metals classification, while EN 1.4740 stainless steel belongs to the iron alloys. There are 10 material properties with values for both materials. Properties with values for just one material (19, 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 90-platinum 10-iridium and the bottom bar is EN 1.4740 stainless steel.
Metric UnitsUS Customary Units
Material Properties
| Density, g/cm3 | 22 | |
| 7.6 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 5.5 to 34 | |
| 22 |
| Latent Heat of Fusion, J/g | 100 | |
| 300 |
| Poisson's Ratio | 0.38 | |
| 0.28 |
| Shear Modulus, GPa | 74 | |
| 77 |
| Specific Heat Capacity, J/kg-K | 130 | |
| 490 |
| Stiffness to Weight: Axial, points | 5.3 | |
| 14 |
| Stiffness to Weight: Bending, points | 9.1 | |
| 25 |
| Thermal Expansion, µm/m-K | 8.6 | |
| 10 |
Alloy Composition
| Carbon (C), % | 0 | |
| 0.3 to 0.5 |
| Chromium (Cr), % | 0 | |
| 16 to 19 |
| Iridium (Ir), % | 9.5 to 10.5 | |
| 0 |
| Iron (Fe), % | 0 | |
| 75.4 to 82.7 |
| Manganese (Mn), % | 0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 0 to 0.5 |
| Nickel (Ni), % | 0 | |
| 0 to 1.0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.040 |
| Platinum (Pt), % | 89.3 to 90.5 | |
| 0 |
| Silicon (Si), % | 0 | |
| 1.0 to 2.5 |
| Sulfur (S), % | 0 | |
| 0 to 0.030 |
| Residuals, % | 0 to 0.2 | |
| 0 |