C21000 is a thin-wall tubular profile made from Copper Material through precision rolling and drawing processes. It combines excellent electrical and thermal conductivity with good corrosion resistance and machinability. Featuring thin, uniform walls, light weight, and precise dimensions, It is suitable for applications such as precision fluid conveyance, electronics and electrical equipment, and refrigeration and air conditioning, where high demands are placed on tube thinness and dimensional accuracy. It is the preferred choice for industrial lightweight and precision applications.
Key Features of C21000 copper material Brass: Unlike the high cost of pure copper and the low precision of standard brass, C21000 brass achieves a balance of “excellent electrical and thermal conductivity, high corrosion resistance, ease of machining, and moderate cost” through precise control of zinc content. Its thin-walled design further highlights its lightweight advantages, significantly reducing the overall weight of equipment while saving on raw material consumption, making it ideal for the installation and operational requirements of high-end precision equipment.
Why choose our C21000 thin-walled copper tube?
1. More consistent quality: Multiple quality control checks ensure that defects in thin-walled parts are eliminated
- Raw Material Control: We use 99.99% high-purity electrolytic copper and high-quality zinc ingots to control impurity levels at the source, ensuring uniform alloy composition and guaranteeing a reddish-gold appearance and superior performance;
- Production Control: Utilizes vacuum melting processes to prevent oxidation inclusions and gas bubbles; employs precision cold rolling and cold drawing, combined with specialized thin-wall calibration equipment, to ensure uniform wall thickness, absence of wall thickness variations and porosity, and compliance with straightness and dimensional accuracy standards; hot working temperatures are controlled between 775–850°C, and annealing temperatures between 540–600°C, optimizing the material’s cold working properties;
- Inspection and Control: Each batch undergoes five major tests—chemical composition, mechanical properties, physical properties, dimensional accuracy, and surface quality—strictly adhering to standards such as GB/T 1527-2021. Authoritative test reports are issued, and all non-conforming products are rejected;
- Surface Control: The product undergoes multiple surface treatment processes, including degreasing, acid washing, and polishing. The surface is smooth, free of scratches, oxidation, and burrs, while the inner walls are smooth and free of scale, ensuring smooth fluid flow. This process also highlights its attractive reddish-gold appearance, making it suitable for direct use in decorative applications.
2. Superior performance: Precisely tailored to the needs of thin-walled applications
- Lightweight + High Strength: With a thin-walled design (as thin as 0.1 mm), it is lightweight, significantly reducing the overall weight of equipment and transportation costs. At the same time, it meets strength standards, is resistant to deformation and cracking, and balances lightweight construction with structural stability;
- Excellent electrical and thermal conductivity: Electrical conductivity of 45–55% IACS and thermal conductivity of 180–200 W/m·K, meeting the electrical conductivity, heat dissipation, and heat transfer requirements of electronic and electrical systems as well as refrigeration systems, thereby improving equipment operational efficiency;
- Outstanding cold working properties: With excellent ductility, it is one of the best grades among all brass alloys for cold working. It can undergo complex processes such as bending, curving, welding, flaring, and deep drawing. After processing, dimensional accuracy remains stable, with minimal risk of breakage or deformation, ensuring high processing efficiency;
- Corrosion Resistance + Eco-Friendly: Resistant to atmospheric, fresh water, and seawater corrosion, with excellent resistance to dezincification. Complies with RoHS environmental standards and is lead-free, making it suitable for high-end electronics, medical devices, food packaging, marine industries, and other sectors with stringent environmental and corrosion resistance requirements;
- Aesthetic Appeal: Features a reddish-gold or light rose-gold appearance that can be easily polished to a mirror finish, combining practicality with decorative value. Ideal for high-end decorative applications, medals, and coins.
3. More Cost-Effective: Reduced costs and increased efficiency, offering outstanding value for money
- Raw Material Savings: The thin-walled design significantly reduces the amount of copper-zinc alloy used, lowering raw material costs by 30–50% and providing a significant cost advantage over pure copper tubing and high-zinc brass;
- Reduced processing costs: High dimensional accuracy and a smooth surface result in minimal machining allowances, allowing for direct installation and use. This saves processing time and reduces material waste. Additionally, excellent cold working properties lower processing difficulty and costs;
- Reduced operational and maintenance costs: Superior wear resistance and corrosion resistance ensure a long service life, reducing the frequency of pipe replacements and lowering operational and maintenance costs as well as downtime losses. These advantages are particularly evident in long-term operating environments such as marine and refrigeration applications.
Applications
1. Electronics and Electrical Engineering:Consumer electronics such as smartphones, laptops, and tablets, as well as electronic components including transformers, relays, connectors, and electrical terminals;
Specific uses: Conductive copper tubes, heat-dissipating copper tubes, connector pins, transformer coil bushings, and fluid delivery tubes inside electronic devices;
2. Refrigeration and Air Conditioning: Household air conditioners, central air conditioning systems, refrigerators, freezers, refrigeration units, heat exchangers, and other refrigeration equipment;
Specific Applications: Refrigerant delivery pipes, condenser tubes, evaporator tubes, heat dissipation tubes, etc.;
3. Precision Machinery and Instrumentation:Precision instruments, measuring equipment, automated equipment, small machinery, etc.;
Specific uses: Precision fluid delivery tubing, internal tubing for instruments, pneumatic tubing, hydraulic tubing, etc.;
4. Automotive Manufacturing:Air conditioning systems, cooling systems, and braking systems for new energy vehicles and conventional internal combustion engine vehicles;
Specific uses: Automotive air conditioning refrigerant lines, coolant hoses, brake fluid lines, etc.;
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