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Brazing Aluminum Wire

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Intro

Aluminum-Silicon wires optimized for superior flow and metallurgical bonding in furnace, torch, or induction brazing processes for aluminum assemblies.

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Introduction

Brazing aluminum requires filler metals with a significantly lower melting point than the base metal to ensure proper flow and capillary action within the joint gap. Our brazing wires, derived from Aluminum-Silicon alloys (typically with 7% to 12% Si), are precisely drawn and cleaned to facilitate smooth feeding and high surface wetting. These wires create clean, strong, and highly conductive joints without the use of specialized welding equipment, making them ideal for high-volume, automated assembly.

Specification

Classification (AWS)ER4047 equivalent (High Silicon)
Key PropertyLow melting range and high fluidity (flow)
Base Metal Compatibility1000, 3000, and 6000 series wrought aluminum
Surface CleanlinessUltra-clean to prevent flux contamination
Diameter RangeAvailable in fine gauges for precise capillary joints

Applications

  • Joining aluminum tubes and components in HVAC systems and appliances.

  • Production of aluminum heat exchangers and evaporators.

  • Automated assembly of complex aluminum structures where tight joint tolerances exist.

  • Manual torch brazing for small aluminum component repairs.

FAQ

  • Q: What is the main difference between aluminum welding and aluminum brazing wires?
  • A: Brazing wires, unlike welding fillers, are designed to melt at a lower temperature than the base metal and flow into the joint by capillary action without melting the base metal; welding wires melt together with the base metal.
  • Q: Does your brazing wire require a specific type of flux?
  • A: Yes, aluminum brazing requires specialized non-corrosive or reactive fluxes. Our wires are chemically compatible with most industry-standard aluminum brazing fluxes.

Advantages

  • Enhanced Fluidity: High silicon content ensures excellent filler metal flow into tight joint gaps, guaranteeing void-free metallurgical bonds.

  • Reduced Base Metal Attack: The carefully controlled melting range minimizes the melting of the aluminum base metal, preserving its geometry and properties.

  • Pressure Tightness: Creates reliable, leak-proof joints required for fluid and gas containment applications.

  • Versatility: Suitable for use with standard aluminum brazing fluxes across various heating methods.

Payment and Shipping

  • Packaging: Supplied in spools or precisely cut straight lengths, packaged to maintain surface integrity.

  • Technical Data: Detailed information on liquidus and solidus temperatures provided for brazing cycle optimization.

  • Minimum Order: Flexible MOQs to support both large production runs and smaller specialized jobs.

About Us

Coming From China, Marketing To The World.

Hangzhou Kunli welding materials Co., Ltd. is China Brazing Aluminum Wire Manufacturers and Wholesale Brazing Aluminum Wire 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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