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Zhejiang Jingliang Copper-Tube Products Co., Ltd

Wholesale Chromium Zirconium Copper

Chromium Zirconium Copper

-- Steady & Reliable Manufacturer --

The High-Hardness Electrode for Resistance Welding

Chromium Zirconium Copper (CuCrZr), specifically the C18150 grade, is the premium choice for resistance welding electrodes and high-stress electrical components. Pure copper is too soft to withstand the mechanical pressure and intense heat of spot welding; it would "mushroom" or deform after just a few cycles. At Zhejiang Jingliang, our CuCrZr is alloyed with approximately 1% Chromium and 0.1% Zirconium. Through a specialized process of vacuum casting, hot forging, and age-hardening, we create a material that is significantly harder and more heat-resistant than pure copper while still maintaining about 80% of its electrical conductivity. The addition of zirconium is key—it raises the "Softening Temperature" of the copper, allowing the material to maintain its hardness even when working at red-hot temperatures on a high-speed automotive assembly line.

Our C18150 rods and blocks are manufactured to meet the strict standards of the RWMA (Resistance Welder Manufacturers' Association) Class 2. The microscopic structure of our CuCrZr is optimized to prevent the "pick-up" or sticking of zinc-coated (galvanized) steels, which is the most common cause of electrode failure. Every batch undergoes ultrasonic testing to ensure a 100% dense, pore-free internal structure, which is vital for maintaining consistent current flow and preventing localized overheating. Whether you are building robotic welding cells for the car industry or high-current heat sinks for power electronics, Jingliang’s Chromium Zirconium Copper delivers the "Endurance" that standard copper alloys simply cannot match.

High-Temperature Strength & Electrical Specs

PropertyC18150 (RWMA Class 2) Specs
Chromium Content0.50% - 1.20%
Zirconium Content0.03% - 0.30%
Hardness (Rockwell)B75 - B85
Electrical Conductivity≥ 80% IACS
Thermal Conductivity320 W/(m·K)
Softening Temperature500°C (Highest in class)
Tensile Strength≥ 450 MPa
Yield Strength≥ 380 MPa
Available FormsRods, Square Bars, Plates, Forgings
StandardASTM B441 / DIN 17666

Automotive Welding, Continuous Casting, and Power Radiators

Chromium Zirconium Copper is the "Standard for Automotive Resistance Spot Welding," used for electrodes that join car body panels. It is essential in "Continuous Casting Molds" for steel and copper production, where it must withstand the thermal shock of molten metal while conducting heat away. In the "Energy Sector," it is used for high-current "Switchgear Components" and circuit breaker contacts. It is used in "Projection Welding" and "Seam Welding Wheels" for manufacturing metal drums and containers. "Aerospace Engines" utilize CuCrZr for high-temperature electrical connectors and sensor housings. It is also found in "Fusion Research" (like tokamaks) for high-heat-flux components. Additionally, it is used for "Heat Sinks" in high-power LEDs and power modules where thermal performance and mechanical rigidity must be balanced.

Thermal Endurance and Anti-Sticking Performance

The primary advantage is "Superior Softening Resistance," allowing electrodes to maintain their shape and "Extend Service Life" even under the intense heat of continuous production. Its "High Electrical and Thermal Conductivity" ensures that the welding energy is focused on the workpiece, "Improving Weld Quality" and reducing energy waste. Our C18150 offers "Excellent Resistance to Deformation," which "Reduces Maintenance Downtime" for electrode dressing. The "Anti-Sticking Property" with galvanized steel is a major productivity benefit, preventing the messy build-up that leads to weak welds. The material is "Highly Workable," allowing it to be forged into complex custom electrode shapes. Furthermore, the "High Density" of our forged CuCrZr ensures that it does not develop internal cracks under the repeated mechanical impact of welding robots, providing a "Massive Safety Margin" in high-speed manufacturing environments.

Heavy-Duty Packaging for Forged Products

CuCrZr rods and plates are heavy and require secure handling. We ship them in "Reinforced Steel-Banded Wooden Boxes" with internal foam padding to prevent impact damage. Payment is 30% T/T and 70% L/C. We ship via Ningbo Port, providing full "RWMA Class 2 Certification" and "Hardness Mapping" reports for forged blocks. Our logistics team ensures that all "Heat Treatment" records are included in the documentation, giving you full confidence in the material's high-temperature performance capabilities.

  • Q: Can I use CuCrZr for welding aluminum?
  • A: While it is possible, specialized materials like Class 1 copper are often preferred for aluminum. CuCrZr is the "King" of welding for mild steel, stainless steel, and galvanized steel.
  • Q: Does the material come pre-aged?
  • A: Yes, we supply C18150 in the "Fully Aged and Hardened" condition, so it is ready for immediate machining into electrodes.
ABOUT US
30+YEARS OF
EXPERIENCE
About Us

A Reliable Partner of the Copper Tube Industry

Zhejiang Jingliang Copper-Tube Products Co., Ltd is China Chromium Zirconium Copper and Chromium Zirconium Copper Factory, which established in 1994, has been deeply involved in the copper tube industry for over three decades. The company primarily produce various specifications of products such as copper tubes, brass tubes, copper square tubes, fin copper tubes, copper capillary tubes, condenser copper tubes, copper evaporator tubes, and conductive rods, which are of quality and have earned the trust and acclaim of customers both domestically and internationally.

Wide Applications:

These products are widely used in various fields including air conditioning, refrigeration, heat exchange, sanitary ware, automotive, machinery, electric furnaces, and chemical industries.

Convenient Transportation:

Strategically located in Tangpu Town, renowned as the “home of copper tubes” in East China. Our company enjoys a prime location, adjacent to the Shangsan Expressway and National Highway 104, and is conveniently situated just over 70 kilometers from Hangzhou and Ningbo, ensuring easy accessibility and a business position.

Strong Financial Resources:

With its strong financial resources and advanced copper tube processing technology, our company holds an advantageous position in market share, brand value, technological content, and product quality, becoming a preferred supplier for many listed groups.

Large Scale Production:

The company occupies an area of over 20,000 square meters, with a construction area of 12,800 square meters. In 2022, our annual production exceeded 7,500 tons, with a value output of up to 450 million yuan, demonstrating our strong production capacity and market competitiveness.

Comprehensive Industry Chain:

Jingliang has now developed into a complete industrial chain integrating smelting, extrusion, drawing, precision rolling, and annealing. It has been awarded multiple honors, including "Top Ten Copper Tube Enterprises" and "Leading Taxpayer in the Copper Tube Industry".

Smart Manufacturing:

Jingliang Copper-Tube Products will better integrate the concept of factory construction into its corporate development strategy, insist on refining technology and polishing products more finely, and the future of "intelligent manufacturing".

Genuine Cooperation:

Zhejiang Jingliang Copper-Tube Products Co.,Ltd warmly welcomes friends from all walks of life to visit and offer guidance. We look forward to joining hands with you to create a brilliant future together.

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