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Aluminum Alloy Wire for Heat Exchanger

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Intro

Specialized Aluminum-Silicon filler wire designed for the high-temperature sealing and joining of aluminum heat exchanger components, ensuring leak-tight and durable joints.

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Introduction

The manufacture of automotive and industrial heat exchangers requires welding materials with excellent flow characteristics and a controlled, low melting point. Our Aluminum-Silicon wires (primarily 4XXX series) are engineered for these specific thermal applications. The presence of Silicon lowers the liquidus temperature, promoting smooth flow and wetting during high-speed brazing or MIG welding processes, ensuring the production of thin-walled, pressure-tight assemblies critical for efficient thermal transfer systems.

Specification

Classification (AWS)ER4047 / ER4043
Silicon ContentControlled range (e.g., 4.5% to 12% Si)
Base Metal Compatibility3003, 6061, and most aluminum brazing sheet alloys
Melting Range (Typical)Lower liquidus temperature for reduced heat input
Diameter Range0.8mm to 1.2mm (fine gauge for thin sections)

Applications

  • Joining tubes and fins in automotive radiators and condensers.

  • Fabrication of industrial intercoolers and air conditioning coils.

  • Welding aluminum piping systems for fluid transfer in heat management.

  • Used as feedstock for specialized flux-cored aluminum brazing applications.

FAQ

  • Q: Why is ER4047 often preferred over ER4043 for heat exchanger joining?
  • A: ER4047 has a higher silicon content (approx. 11-13%) compared to ER4043 (approx. 5%), which results in a lower melting point, enhancing fluidity, and reducing the risk of hot cracking on thinner materials.
  • Q: Can these wires be used in dip brazing or furnace brazing processes?
  • A: While designed for welding, the alloys' composition is derived from brazing fillers. They can be utilized as specialized preforms or rods in manual torch brazing setups, leveraging their low melting characteristics.

Advantages

  • Controlled Flow: High silicon content in ER4047 provides excellent fluidity and melt characteristics, ensuring complete joint penetration and sealing.

  • Minimal Distortion: Lower welding temperatures and reduced heat input minimize thermal distortion in delicate, thin-walled heat exchanger components.

  • Pressure Integrity: Consistently clean wire surface and controlled chemistry result in defect-free welds that easily pass pressure and leak testing requirements.

  • Bright Finish: Uniformly clean surface minimizes feeding issues in automated welding heads.

Payment and Shipping

  • Sample Testing: Availability of technical samples for customer validation on specific heat exchanger joint designs.

  • Logistics: Efficient handling of small, precision-wound spools to minimize wire damage during transit.

  • Documentation: Detailed Material Data Sheets (MDS) including chemical analysis and flow characteristics.

About Us

Coming From China, Marketing To The World.

Hangzhou Kunli welding materials Co., Ltd. is China Aluminum Alloy Wire for Heat Exchanger Manufacturers and Wholesale Aluminum Alloy Wire for Heat Exchanger OEM/ODM Suppliers. We are located in the industrial zone of Puyang Town, Xiaoshan District, Hangzhou, Zhejiang Province. It is a high-technology enterprise specializing in the research, development and manufacturing of high-performance. The company has more than 20 years of aluminum alloy wire production experience, with international advanced manufacturing equipment, complete testing equipment,stable production process and strict quality control system.
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