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Bright Type N NiCrSi NiSiMg NNX NPX Thermocouple Bare Wire for Extension Cable
TYPE N (NiCrSi Vs.NiCrMg) is used in oxidizing, inert or dry reducing atmospheres. Exposure to vacuum limited to short time periods. Must be protected from sulfurous and marginally oxidizing atmospheres. Reliable and accurate at high temperatures.
1. Chemical Composition
| Material | Chemical composition (%) | ||||
| Ni | Cr | Si | Mg | Al | |
| NP(NiCrSi) | bal | 13.7-14.7 | 1.2-1.6 | <0.01 | |
| NN(NiCrMg) | bal | <0.02 | 4.2-4.6 | 0.5~1.5 | |
2. Physical properties and Mechnical properties
|
Material |
Density(g/cm3) |
Melting point℃) |
Tensile Strength(Mpa) |
Volume resistivity(μΩ.cm) |
Elongation rate (%) |
| NP(NiCrSi) | 8.5 | 1410 | >620 | 100.0 (20℃) | >30 |
| NN(NiCrMg) | 8.6 | 1340 | >550 | 33.0(20℃) | >35 |
3. EMF Value range at different temperature
| Material | EMF value Vs Pt(μV) | |||||
| 100℃ | 200℃ | 300℃ | 400℃ | 500℃ | 600℃ | |
| NP(NiCrSi) | 1755~1813 | 3910~3976 | 6313~6383 | 8880~8959 | 11552~11654 | 14307~14433 |
| NN(NiCrMg) | 975~1005 | 1954~1986 | 2975~3011 | 4035~4075 | 5120~5170 | 6212~6274 |
| EMF value Vs Pt(μV) | |||||
| 700℃ | 800℃ | 900℃ | 1000℃ | 1100℃ | |
| 17129~17275 | 20010~20178 | 22951~23139 | 25943~26149 | 28972~29194 | |
| 7288~7362 | 8318~8402 | 9281~9373 | 10159~10261 | 10948~11060 | |