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| Brand Name : | OHMALLOY |
| Model Number : | Type J |
| Certification : | ISO9001-2008 |
| Price : | negotiable |
| Payment Terms : | L/C, T/T, |
| Supply Ability : | 10tons/month |
| Delivery Time : | 10-15 working days |
Type J (Fe CuNi45) Thermocouple Wire 0.193mm Diameter Compliant for
High-Temperature Sensing
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 Mechanical 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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