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Aluminum Wire for High Purity Applications

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Product Description

Ultra-pure aluminum filler metals (ER1100 and specialized high-purity variants) designed for applications where chemical purity, electrical conductivity, or radiation transparency are critical. These materials feature a guaranteed aluminum content typically ≥99.5% with extremely low levels of all residual elements (e.g., Fe, Si, Cu). This ensures minimal outgassing in vacuum systems, highest electrical and thermal conductivity, and predictable behavior in corrosive chemical environments, making it ideal for the scientific, electronics, and semiconductor industries.

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20+ Years Experience

Over two decades of aluminum alloy wire production expertise

International Certifications

DB, CE, ABS, DNV, CCS and other authoritative certifications

200MT Monthly Capacity

Large-scale production with consistent quality

Global Export

Exporting to over 30 countries worldwide

Introduction

In specialized sectors like high-energy physics, electronics, and food processing, the material used must not introduce impurities or volatile compounds. Our high-purity aluminum wire, primarily ER1100, is manufactured from high-grade primary aluminum billets and undergoes dedicated cleaning to maintain its purity throughout the process. The resulting material is chemically inert and dimensionally stable, making it the choice for welding components intended for ultra-high vacuum (UHV) chambers, specialized chemical containers, and high-frequency electrical conductors.

Specification

Alloy Focus (AWS)ER1100 (99.0% min Al), specialty >99.5% Al grades
Minimum Aluminum PurityTypically ≥99.5% Al (excluding Si and Fe)
Key PropertiesHigh Electrical/Thermal Conductivity, Low Outgassing, Chemical Inertness
Resistivity (1100)Typically 2.8×10−8Ω⋅m (low electrical resistivity)
Contaminant ControlTrace element concentration controlled to the lowest practical limits

Applications and Solutions

  • Ultra-High Vacuum (UHV) Chambers: Welding vacuum vessels and flanges for semiconductor processing and scientific accelerators where minimal outgassing is essential.

  • Electrical Conductors: Joining high-current aluminum bus bars and electrical connections where high thermal and electrical conductivity are required.

  • Chemical Processing Equipment: Welding tanks and piping for handling high-purity water or certain corrosive chemicals where standard alloys would leach impurities.

  • Anode/Cathode Fabrication: Welding high-purity aluminum components used in electrochemical processes.

FAQ

  • Q: Why is ER1100 (high purity) not typically used for structural welding?A: Pure aluminum is very soft and has low tensile strength compared to alloyed aluminum (like 5XXX or 6XXX). It is used for its functional properties (conductivity, purity), not for load-bearing strength.
  • Q: What is outgassing in high vacuum applications?A: Outgassing is the release of gases (like water vapor or residual H2​) trapped within the material when placed under a high vacuum. Impurities increase outgassing, which compromises the vacuum level. High-purity wire minimizes this.
  • Q: Can I use ER4043 for high conductivity joints?A: ER4043 (Al-Si) has significantly lower electrical and thermal conductivity than ER1100. For maximum conductivity, the use of ER1100 or specialized Al-Mg fillers is recommended.

Advantages and Core Features

  • Maximum Conductivity: The high purity maximizes the thermal and electrical conductivity of the weld joint, crucial for heat sinks and power conductors.

  • UHV Compatibility: Minimal internal impurities mean the material has an extremely low vapor pressure and minimal outgassing when placed under high vacuum or heated.

  • Chemical Inertness: High purity resists attack from a wider range of aggressive chemicals compared to alloyed aluminum, extending service life.

  • Workability and Ductility: Highly ductile and soft, making it easy to form and weld with excellent flow characteristics.

Material Selection Guide

For applications where conductivity, thermal transfer, or chemical purity are the primary goals, ER1100 is the base choice. If a slight increase in strength is needed without compromising purity severely, ER4043 may be considered, but ER1100 is preferred for maximum purity. Always request a detailed MTC confirming the elemental breakdown of all trace elements.

About Us

Coming From China, Marketing To The World.

Hangzhou Kunli welding materials Co., Ltd. is China Aluminum Wire for High Purity Applications Manufacturers and Wholesale Aluminum Wire for High Purity Applications 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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