Karma Ni-Cr-Al-Fe 6J22/6J422 Precision Resistance Wire High-Performance Solution for Fine Resistance Elements

Karma Ni-Cr-Al-Fe 6J22/6J422 Precision Resistance Wire High-Performance Solution for Fine Resistance Elements

Karma Ni-Cr-Al-Fe 6J22/6J422 is a precision resistance wire composed primarily of nickel (Ni), chromium (Cr), aluminum (Al), and iron (Fe). It is known for its high resistance, reliability, and long-lasting performance, making it ideal for various industrial and electrical applications where precise resistance control is needed.

Karma alloy have common name Nikrothal L/Evanohm/Alloy 800, Karma alloy is made up of copper, nickel, Aluminum and Iron as the main components. The resistivity is 2~3 times higher than manganin. It has lower temperature coefficient of resistance( TCR) , lower thermal EMF versus copper, good permanence of resistance for a long period of time and strong anti-oxidation. Its working temperature range is wider than manganin (-60~300℃ ). It is suitable for making fine precision resistance elements and strain.

Chemical composition

Propertises

The tolerance of wires diameter, size range

Kamar (6J22) Technical Data of wires

Some key features of 6J22 include:

1. Composition: 6J22 is composed primarily of nickel, with significant amounts of chromium (around 20%), and smaller percentages of copper, manganese, silicon, and iron.
2. Electrical Resistivity: This alloy has a high electrical resistivity, which is crucial for applications requiring precise resistance values.
3. Temperature Coefficient of Resistance (TCR): 6J22 boasts a low TCR, ensuring that its resistance changes minimally with temperature fluctuations, thus maintaining stability in various environments.
4. Corrosion Resistance: The high chromium content endows 6J22 with excellent corrosion resistance, particularly against oxidation and in acidic or alkaline conditions.
5. Mechanical Properties: 6J22 exhibits good mechanical strength and ductility, allowing it to be shaped and manipulated for various applications without compromising its integrity.
6. Thermal Stability: The alloy's resistance remains stable over a broad temperature range, making it suitable for high-temperature applications.
7. Microstructure: 6J22 has a single-phase austenitic structure, which contributes to its excellent physical and chemical properties.

This alloy's combination of high resistivity, low TCR, and corrosion resistance makes it a preferred choice in electronics, electrical engineering, and industries where precision and reliability are paramount.

Applications:

• Precision Resistance Elements: 6J22 is suitable for making precise resistance elements in various measuring instruments and meters due to its high resistivity and low temperature coefficient of resistance.
• Micro Resistance Elements and Strain Gauges: The alloy is also used for manufacturing precise micro resistance elements and strain gauges, benefiting from its stability and resistance to oxidation.
• Heating Elements: 6J22's resistance stability and high-temperature performance make it ideal for electric furnace heating elements and other applications requiring resistance to heat.
• Compensation Leads: Given its low thermal electromotive force against copper, 6J22 is used in compensation leads for thermocouples to ensure accurate temperature measurements.
• Electrical Measuring Instruments: The alloy's precision resistance characteristics make it widely used in electrical measuring instruments where measurement accuracy is crucial.

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 preci.sion of our products. We have the tightest tolerances and deliver within a few days to a fewweeks. As a result, we have become the leading alloy wire supplier in the industry.

Senphus Subsidiaries:

• Jiangyin Chengxin Alloy Material Co., Ltd.
• Jiangyin Senphus Electrical Materials Co., Ltd.
• Jiangsu Xiangcheng Supply Chain Management Co., Ltd.

Jiangyin Chengxin Alloy Material Co., Ltd.: With nearly 20 years of experience, Jiangyin Chengxin is a leading alloy wire manufacturer in China. We offer a wide range of services, from fine wire drawing to resistance wire manufacturing. Our specialty lies in the quality and precision of our products, achieving the tightest tolerances and delivering orders within days to weeks. As a result, we have established ourselves as the premier supplier of alloy wire in the industry.

Our product range includes:

• Copper-nickel alloys (CuNi1-CuNi44)
• Karma (Nikrothal L/Evanohm/Alloy 800)
• Manganin and Constantan
• Nickel-chromium alloys
• Thermocouple alloys (Type K, N, E, T, J)
• Thermocouple extension wire
• PTC thermistor resistance alloy
• Pure nickel wire and Monel alloy

These alloys are available in various forms, including wire, ribbon, stranded, and enamelled. Major applications include seat heating, underfloor heating, military projects, aerospace, household appliances, heating wire, mechanical and electrical plants, and temperature instruments. Our manufacturing processes are ISO 9001:2015 certified, and we specialize in fine and ultra-fine wire drawing, offering wire diameters from 0.025 mm (0.001") to 13 mm (0.51") in small batches, medium volumes, and mass production. We maintain a comprehensive quality inspection system, including in-house chemical analysis, chromatographic analysis, metallurgical analysis, pinhole tests, wire construction tests, and tension tests to ensure the highest quality standards.

Senphus Electrical Material Co., Ltd.: Founded in 2003, Senphus Electrical Material Co., Ltd. integrates research, manufacturing, and sales of electric heating alloys, heating cables, heating wires, and heating products. Leveraging over a decade of technical expertise in heating alloy wire, we have adopted advanced heating cable technology and machinery, successfully developing heating cables, temperature controllers, and temperature control systems suitable for building heating, pipe insulation, outdoor snow melting, wind power blade production, car seat heating, and healthcare applications.

The company is recognized as a high-tech enterprise in Jiangsu Province and a small giant enterprise in Jiangyin City, specializing in innovative technologies. We operate the "Wuxi Heating Cable Engineering Technology Research Center" and collaborate with experts from renowned domestic universities. Our portfolio includes 5 invention patents and over 30 utility model patents, showcasing our strong research and development capabilities.

With an annual output exceeding 1,000 tons of thermal alloy wire and an output value of approximately 105 million yuan, our products are well-received in markets such as the UK, Italy, Canada, Peru, and Spain. Our heating cables generate an annual output value of over 80 million yuan, with exports to Germany, Japan, the United States, Malaysia, Denmark, Brazil, and other countries.

The company has successfully passed multiple quality management system certifications, including IATF 16949, ISO 9001, ISO 14001 (Environmental Management System), and ISO 45001 (Occupational Health and Safety Management System). Our heating cables and related products have also obtained test reports from the Shanghai Cable Research Institute Test Center and received certifications such as UL (United States), VDE (Germany), CE (European Union), and RoHS.

Commitment to Quality: We adhere to the business commitment of "Reputation First, Quality First, Customer First" and uphold the quality policy of "Integrity-Based, Quality-Oriented, Excellent Service." We are dedicated to providing accurate products and professional services, and we look forward to collaborating sincerely with you to achieve mutual success.