NiCr Alloy Cr30Ni70 for High-Temperature Applications in Furnaces and Heat-Treating Equipment

NiCr Alloy Cr30Ni70 for High-Temperature Applications in Furnaces and Heat-Treating Equipment

Main characteristics of Ni-Cr and Ni-Cr-Fe electric heating alloys

Some key features of Cr30Ni70 include:

1. High Electrical Resistivity: Cr30Ni70 has a high electrical resistivity, which is beneficial for applications requiring efficient heating elements.

2. Corrosion Resistance: The alloy exhibits excellent resistance to corrosion, making it suitable for use in environments with corrosive substances.

3. High-Temperature Stability: It maintains its properties at high temperatures, with a maximum service temperature of around 1250°C, which is vital for high-temperature applications.

4. Oxidation Resistance: Cr30Ni70 has good resistance to oxidation, which is important for long-term performance in high-temperature environments.

5. Thermal Expansion: The alloy has a low positive temperature coefficient, ensuring consistent performance in applications sensitive to temperature changes.

6. Mechanical Properties: At room temperature, Cr30Ni70 has high plasticity, which allows for excellent cold stamping and welding properties.

7. Microstructure: After solution treatment, Cr30Ni70 has a single-phase austenite structure, contributing to its structural stability during use.

8. Weldability: The alloy is relatively easy to weld, which is an advantage in applications where components need to be joined without compromising the material's integrity.

These features make Cr30Ni70 a popular choice for applications in the electrical, chemical, aerospace, and metallurgical industries, particularly for high-temperature resistance elements and heating elements.

Applications:

• Heating Elements in Industrial Furnaces: Cr30Ni70 is commonly used for manufacturing heating elements in industrial electric furnaces, where its excellent high-temperature oxidation resistance and creep resistance are beneficial for long-term stable operation at high temperatures

• Household Appliances: It is used in electric heating elements within household appliances, such as in electric ovens, water heaters, and ironing boards, due to its long service life and uniform heating capabilities

• Resistors and Heating Elements: Cr30Ni70 is utilized in industrial furnaces (wirewound resistors, metal film resistors), injection molds, and soldering irons, where its high resistivity and good weldability are advantageous .

• High-Temperature Sensors: The alloy serves as a material for high-temperature sensors in industrial processes that require precise temperature measurement, thanks to its stable resistivity and oxidation resistance at high temperatures

• Aerospace Industry: Cr30Ni70 is used in the aerospace field for high-temperature engine parts and heat barrier materials, leveraging its high-temperature strength and oxidation resistance

• Metal Sheathed Tubular Elements: The alloy is used in the production of metal sheathed tubular elements and cylindrical elements, showcasing its versatility in various forms and applications

These applications highlight the versatility and importance of Cr30Ni70 in various industries where high temperatures and resistance to heat and corrosion are critical factors.

Technical data of wires

The tolerance or wires diameter

Technical data of ribbon

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.