Pure Gold (Au 99.99%) vs Pure Platinum (Pt 99.95%)
Property comparison of Pure Gold (Au 99.99%) and Pure Platinum (Pt 99.95%), both precious metal.
| Property | Pure Gold (Au 99.99%) | Pure Platinum (Pt 99.95%) | Difference |
|---|---|---|---|
| Tensile strength | 130 MPa | 145 MPa | +12% |
| Elongation | 35 % | 35 % | 0% |
| Elastic modulus | 78,000 MPa | 170,000 MPa | +118% |
| Poisson ratio | 0.42 | 0.39 | -7% |
| Density | 19,300 kg/m³ | 21,450 kg/m³ | +11% |
| Thermal conductivity | 314 W/m·K | 72 W/m·K | -77% |
| Specific heat | 130 J/kg·K | 132 J/kg·K | +2% |
| Coefficient of thermal expansion | 0.000014 1/K | 0.000009 1/K | -38% |
| Melting point | 1,063 °C | 1,769 °C | +66% |
Difference is Pure Platinum (Pt 99.95%) relative to Pure Gold (Au 99.99%). 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
- 24K / fine gold
- standard
- CRC Handbook of Chemistry and Physics
- heat treatment
- annealed
- grade
- commercially pure
- standard
- ESPI Metals technical data / Johnson Matthey PMR 1966
- heat treatment
- annealed 700C
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