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0.35mm Type J thermocouple bare Wire For Thermocouple Sensor
TYPE J (Iron vs Constantan) is used in vacuum, oxidizing, inert or reducing atmospheres. Iron element oxidizes rapidly at temperatures exceeding 538'C, and therefore heavier gauge wire is recommended for longer life at these temperatures
1. Chemical Composition
| Material | Chemical composition (%) | ||||
| Ni | Cu | Si | Iron | Al | |
| JP(Iron) | 100 | ||||
| JN(Constantan) | 45 | 55 | |||
2. Physical properties and Mechnical properties
|
Material |
Density(g/cm3) |
Melting point(℃) |
Tensile Strength (Mpa) |
Volume resistivity(μΩ.cm) |
Elongation rate (%) |
| JP(Iron) | 7.8 | 1402 | >240 | 12.0(20℃) | >20 |
| JN(Constantan) | 8.8 | 1220 | >390 | 49.0(20℃) | >25 |
3. EMF Value range at different temperature
| Material | EMF value (μV) | ||||||||||
| 100℃ | 200℃ | 300℃ | 400℃ | 500℃ | 600℃ | ||||||
| JP-JN | 5187~5351 | 10696~10862 | 16244~16410 | 21760~21936 | 27281~27505 | 32962~33242 | |||||
| EMF value Vs Pt(μV) | |||||||||||
| 700℃ | 750℃ | 760℃ | 800℃ | 900℃ | 1000℃ | ||||||
| 38958~39306 | 42089~42473 | 42725~43113 | |||||||||
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Ohmalloy Material Co., Ltd
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