Nikrothal® TE is an austenitic nickel-chromium (NiCr) for use at temperatures up to 1200°C (2190°F). The alloy is developed for use in metal sheathed tubular elements.
The alloy combines low nickel content and low temperature factor of resistivity. It is a highly attractive alternative to alloys with higher nickel content, such as Nikrothal® 80. In most tubular element applications it is possible to achieve at least the same indicated service life by performing a slight element redesign.
Chemical composition
| C % | Si % | Mn % | Cr % | Ni % | Fe % | |
|---|---|---|---|---|---|---|
| Nominal composition | Bal. | |||||
| Min | - | 1.5 | - | 21.0 | - | 8.0 |
| Max | 0.10 | 3.0 | 1.0 | 23.0 | - | 9.0 |
Mechanical properties
| Wire size | Yield strength | Tensile strength | Elongation | Hardness |
|---|---|---|---|---|
| Ø | Rp0.2 | Rm | A | |
| mm (in.) | MPa (ksi) | MPa (ksi) | % | Hv |
| 0.5 (0.020) | 390 (56,6) | 800 (116) | 35 | 190 |
Physical properties
| Density g/cm3 (lb/in3) | 8.10 (0.293) |
|---|---|
| Electrical resistivity at 20°C Ω mm2/m (Ω/cmf) | 1.19 (716) |
| Temperature °C | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 | 1000 | 1100 | 1200 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ct | 1.02 | 1.03 | 1.04 | 1.05 | 1.06 | 1.06 | 1.06 | 1.06 | 1.06 | 1.07 | 1.07 | 1.08 |
| Temperature °C (°F) | Thermal Expansion x 10-6/K |
|---|---|
| 20 - 250 (68-482) | 14 |
| 20 - 500 (68-932) | 15 |
| 20 - 750 (68-1382) | 16 |
| 20 - 1000 (68-1832) | 17 |
| Melting point °C (°F) | 1350 (2462) |
|---|---|
| Max continuous operating temperature in air °C (°F) | 1200 (2190) |
| Magnetic properties | The material is non-magnetic |
| Emissivity - fully oxidized material | 0.88 |
