Pure Platinum (Pt 99.95%) vs Pure Silver (Ag 99.9%)
Property comparison of Pure Platinum (Pt 99.95%) and Pure Silver (Ag 99.9%), both precious metal.
| Property | Pure Platinum (Pt 99.95%) | Pure Silver (Ag 99.9%) | Difference |
|---|---|---|---|
| Tensile strength | 145 MPa | 125 MPa | -14% |
| Elongation | 35 % | 40 % | +14% |
| Elastic modulus | 170,000 MPa | 71,000 MPa | -58% |
| Poisson ratio | 0.39 | 0.37 | -5% |
| Density | 21,450 kg/m³ | 10,490 kg/m³ | -51% |
| Thermal conductivity | 72 W/m·K | 428 W/m·K | +494% |
| Specific heat | 132 J/kg·K | 235 J/kg·K | +78% |
| Coefficient of thermal expansion | 0.000009 1/K | 0.00002 1/K | +124% |
| Melting point | 1,769 °C | 962 °C | -46% |
Difference is Pure Silver (Ag 99.9%) relative to Pure Platinum (Pt 99.95%). Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
- grade
- commercially pure
- standard
- ESPI Metals technical data / Johnson Matthey PMR 1966
- heat treatment
- annealed 700C
- grade
- fine silver
- standard
- ESPI Metals technical data / NBS Circular 412
- heat treatment
- annealed
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