Low Thermal Expansion CuNi Alloy CuNi34 For Stable Performance At High Temperatures

Low thermal expansion CuNi Alloy CuNi34 for stable performance at high temperatures

CuNi34 is a copper-nickel alloy with approximately 34% nickel, known for its excellent resistance to corrosion, particularly in seawater. This makes it ideal for use in marine environments such as shipbuilding, offshore platforms, and desalination plants. CuNi34 is highly resistant to pitting, biofouling, and stress corrosion cracking, which are common challenges in marine applications. Its durability in aggressive environments helps ensure long-lasting performance in conditions that would typically degrade other materials.

The alloy also possesses good mechanical properties, offering strength, ductility, and toughness. While its electrical and thermal conductivity is lower than that of pure copper due to the nickel content, it still maintains adequate conductivity for certain industrial uses, such as heat exchangers and cooling systems.

CuNi34 is commonly used in pipes, tubes, and marine components, where its combination of corrosion resistance, mechanical strength, and resistance to harsh conditions is critical. It is a reliable and cost-effective material choice for industries requiring durable, corrosion-resistant solutions, especially in seawater or chemically aggressive environments.

Main physical properties:

Main technical data

Technical data table

• Tolerance of ohm/m: ±5%
• Round wire: range from 0.04mm (0.0016″) to 12mm (0.4724″)
• Ribbon: range from 0.05mm (0.002″) to 6mm (0.2362″), Max ratio width : thickness = 10:1

Some key features of CuNi34 include:

• Corrosion Resistance:

CuNi34 exhibits excellent resistance to seawater corrosion and is commonly used in marine engineering, such as shipbuilding, offshore structures, and desalination plants.

It resists biofouling (accumulation of marine organisms) and is less prone to pitting corrosion compared to other copper alloys.

• Mechanical Properties:

The alloy has good strength, ductility, and toughness.

It has moderate strength but remains highly resistant to stress corrosion cracking, especially in marine or aqueous environments.

• Thermal and Electrical Conductivity:

While copper is known for its high electrical conductivity, CuNi34 has lower conductivity than pure copper due to the presence of nickel.

It retains reasonable thermal conductivity, which can be useful in heat exchange applications.

Applications:

• Marine Engineering: Due to its resistance to seawater corrosion, CuNi34 is used for components in ships, submarines, and offshore structures.
• Heat Exchangers: It is also used in heat exchanger systems, particularly those that deal with seawater or aggressive environments.
• Pipes and Tubes: CuNi34 is used for tubing and piping in industries like desalination and offshore oil extraction.

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.