Jan 7 2004
Background
Platinum / Iridium Pt 90 / Ir 10 alloy has been used in “non-standard” thermocouples, electrical contacts and for electrodes in medical research. The alloy is harder and mechanically stronger than Platinum.
Key Properties
The key properties of Platinum / Iridium Pt 90 / Ir 10 alloy are tabulated below.
Table 1. Key properties
| Electrical Properties |
| Temperature coefficient ( K-1 ) |
0.0013 |
| Electrical resistivity ( µOhm.cm ) |
25 |
| Mechanical Properties |
| Elongation at break ( % ) |
<25 |
| Hardness - Brinell |
130-190 |
| Tensile strength ( MPa ) |
380-620 |
| Physical Properties |
| Density ( g.cm-3 ) |
21.56 |
| Melting point (°C ) |
1800 |
| Thermal Properties |
| Coefficient of thermal expansion ( x10-6 K-1 ) |
8.7 @ 20-100 °C |
| Thermal conductivity ( W.m-1.K-1 ) |
31 @ 23 °C |
About Goodfellow
Goodfellow supplies metals, ceramics and other materials to meet the research, development and specialist production requirements of science and industry worldwide.
The Goodfellow group consists of four companies. The main administration, research laboratories and workshops are located at the Company's headquarters in Cambridge, England. The subsidiary offices in America, France and Germany provide an additional service.