Jiangyin Chengxin Alloy Material Co., Ltd ，
| Payment Terms | T/T,D/P |
| Supply Ability | 30 tons per day |
| Delivery Time | 3 days |
| Packaging Details | Packed with waterproof paper or weave bag, into pallets or wooden case. Special packaging requirements can also be accommodated. |
| Product Name | Fe-CuNi (Type J) Constantan Thermocouple Wire |
| JP Material | 100% Fe |
| JN Material | 55% Cu; 45% Ni |
| Brand Name | Senphus |
| Model Number | Type J |
| Certification | SGS, ISO9001 |
| Place of Origin | Jiangsu, China |
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Product Specification
| Payment Terms | T/T,D/P | Supply Ability | 30 tons per day |
| Delivery Time | 3 days | Packaging Details | Packed with waterproof paper or weave bag, into pallets or wooden case. Special packaging requirements can also be accommodated. |
| Product Name | Fe-CuNi (Type J) Constantan Thermocouple Wire | JP Material | 100% Fe |
| JN Material | 55% Cu; 45% Ni | Brand Name | Senphus |
| Model Number | Type J | Certification | SGS, ISO9001 |
| Place of Origin | Jiangsu, China | ||
| High Light | Precision Temperature Monitoring Thermocouple Wire ，Harsh Conditions Thermocouple Wire ，NiCrSi-NiSiMg Thermocouple Wire | ||
Reliable Type J Thermocouple Wire — Optimized for Mid-Range Temperature Measurement
Chengxin Alloy offers precision-engineered Type J thermocouple wire, designed for accurate temperature sensing in industrial furnaces, heat treatment systems, and general-purpose thermal applications. Known for its high sensitivity, Type J is an economical and robust solution for temperature ranges between -40°C to +750°C.
Type J thermocouple wire consists of Iron (Fe) and Constantan (Cu-Ni) conductors, providing a strong and stable EMF signal in mid-range temperature environments. Chengxin Alloy ensures high quality through controlled alloy ratios, precise drawing, and strict insulation matching for reliable field performance.
Thermocouple temperature range and tolerance
Name | Usag Classification | Grade | Max. operating temperature(℃) | emperitre nres) | Tnlerene | Standard | |
Lang term | Short term | ||||||
Fe-CuNi (Type J) thermocouple bright wire | J | l | 600 | 750 | -40~750 | ±1.5℃ or ±0.4%t | GB/T4994 ISO 14125 |
| Ⅱ | -40~750 | ±2.5℃ or ±0.75%t | |||||
| Name | JP | JN |
| Melting Range(℃) | 1402 | 1220 |
| Density(g/cm³) | 7.8 | 8.8 |
| Resistivity(μΩm20℃) | 12 | 49 |
| Resistance-temperture coefficient ×10-4/K(0℃-1200℃) | 95 | 0.5 |
| Tensile strength Rm N/mm² MPa | ≥240 | ≥390 |
| Elongation % | ≥20 | ≥25 |
Key Features
Fiberglass: Heat resistant to 500°C
PVC: Economical and flexible
Teflon (PTFE): Ideal for corrosive or moist conditions
Silica fiber or Ceramic (available upon request)
Typical Applications
Why Choose Chengxin Alloy?
Chengxin Alloy provides high-quality Type J thermocouple wire and Type J thermocouple cable solutions tailored for industrial and laboratory temperature measurement needs. Our JX thermocouple wire—also known as Type JX extension wire—ensures accurate signal transmission between thermocouple probes and control systems. Constructed with an iron-positive leg and constantan-negative leg, J-type thermocouple wire is ideal for applications up to 750°C. Whether you're sourcing cable thermocouple Type J, Watlow-compatible thermocouple Type J, or simply looking for durable, corrosion-resistant Type J cable, Chengxin’s products deliver consistent performance. Available in bare wire or insulated formats, including kabel thermocouple Type J, our offerings meet ANSI and IEC standards for precision. With reliable Type J wire materials, tight tolerances, and full traceability, we’re ready to support your thermocouple assembly or OEM requirements.
Company Details
Business Type:
Manufacturer,Exporter,Seller
Year Established:
2003
Total Annual:
230000000-240000000
Employee Number:
1400~1500
Ecer Certification：
Verified Supplier
Company Overview: Jiangyin Chengxin Alloy Material Co., Ltd has more than 20 years of experience as the lead.ing alloy wire manufacturer in China. We offer a wide range of services from fine wire drawing toresistance wire manufacturing. Since the beginning, our specialty has been the quality and pre... Company Overview: Jiangyin Chengxin Alloy Material Co., Ltd has more than 20 years of experience as the lead.ing alloy wire manufacturer in China. We offer a wide range of services from fine wire drawing toresistance wire manufacturing. Since the beginning, our specialty has been the quality and pre...
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