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 |
| Application | The High Sensitivity used temperature detection element in industry |
| 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 | Application | The High Sensitivity used temperature detection element in industry |
| Brand Name | Senphus | Model Number | type J |
| Certification | SGS, ISO9001 | Place of Origin | Jiangsu, China |
| High Light | Industrial Processes Thermocouple Wire ，Moderate Temperatures Thermocouple Wire ，Fe-CuNi Thermocouple Wire | ||
Fe-CuNi Type J Thermocouple Wire for Industrial Processes with Moderate Temperatures
Fe-CuNi Type J Thermocouple Wire is a widely used thermocouple material composed of a positive leg made of pure iron (Fe) and a negative leg made of Copper-Nickel alloy (CuNi), commonly known as Constantan. Type J thermocouples are known for their affordability, high sensitivity, and effective use in moderate temperature ranges, especially in environments free from oxidizing conditions.
Fe-CuNi Type J Thermocouple Wire is a cost-effective and reliable solution for moderate-temperature applications. Its high sensitivity, affordability, and stable performance make it a popular choice for industrial heating, temperature monitoring, and general-purpose uses in environments free of oxidizing or corrosive conditions.
color codes of thermocouple ( J type )
| 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 |
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 | |||||
Effective in temperatures ranging from -210°C to 760°C (-346°F to 1400°F), making it suitable for low-to-moderate temperature applications.
Produces a thermoelectric voltage of approximately 55 µV/°C at 0°C, ensuring accurate temperature readings.
Positive Leg (Fe): Made of pure iron for consistent performance.
Negative Leg (CuNi/Constantan): Approximately 55% Copper and 45% Nickel.
Provides stable and reliable thermoelectric output within its operating range.
Economical compared to other thermocouple types, making it ideal for general-purpose applications.
Resistant to oxidation in reducing or vacuum environments.
Not suitable for oxidizing environments at high temperatures, as iron is prone to rapid oxidation.
Widely used in industrial heating processes, kilns, and furnaces.
Common in applications such as temperature monitoring in oil and gas, chemical processing, and power generation.
Available in bare wire, insulated wire, or cable forms with various insulation materials such as fiberglass, Teflon, or ceramic.
Shielded cables are available for use in electrically noisy environments.
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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