1. Basic Physical Properties of Platinum-Iridium Alloys
| Alloy Grade | Melting Point (°C) | Density (g/cm³) | Hardness (HV) | Tensile Strength (MPa) |
| PtIr10 | 1840 | 21.45 | Hardened: 185 Annealed: 140 |
625–1150 |
| PtIr20 | 1840 | 21.45 | Hardened: 260 Annealed: 195 |
625–1150 |
2. Marine Application Selection Comparison
| Requirement | Recommended Grade | Advantages |
| Extreme corrosion | PtIr20 | 40% higher hardness, doubles sealing life in ship valves |
| Micro-current sensing Weak electrical contacts |
PtIr10 | Lower resistivity (1.2 μΩ·m), 15% signal stability improvement |
| Cost-sensitive parts | PtIr10-clad titanium | 50% less precious metal usage, meets industrial corrosion resistance requirements |









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