Chemical components

Product Description

ECu is a high-purity copper coated electrode conforming to AWS A5.6/A5.6M standards, specifically formulated for welding pure copper, deoxidized copper, and oxygen-free copper base materials . Featuring a nominal composition with a minimum of 98.0wt.% copper (including silver) and controlled deoxidizers (Mn≤0.50%, Si≤0.50%, P≤0.15%), it produces dense, porosity-free deposits with excellent electrical and thermal conductivity . This electrode is ideal for joining homogeneous copper components, dissimilar welding (copper to mild steel or stainless steel), and for corrosion-resistant surfacing and cladding applications using Shielded Metal Arc Welding (SMAW) .

Features

▪ Superior Electrical and Thermal Conductivity: Delivers nominal all-weld metal electrical conductivity suitable for efficient current-carrying capability in bus bars, connectors, and conductor rolls . The high-purity copper matrix maintains essential conductive and heat transfer properties for electrical, electronic, and thermal management applications .

▪ Stable and Reliable Mechanical Performance: The deoxidized composition effectively prevents porosity and oxygen embrittlement during welding, producing sound, high-density deposits . The all-weld metal exhibits tensile strength of approximately 220-260 MPa with excellent ductility (elongation ≥29-32%), providing good workability and forming characteristics for fabricated components .

▪ Excellent Corrosion Resistance: Offers outstanding resistance to atmospheric corrosion, seawater, and various chemical environments, making it suitable for marine and industrial applications where long-term durability is essential . The weld metal provides good color match to copper base materials for aesthetic and architectural elements.

▪ Good Weldability and Handling: Features a stable arc with smooth, well-formed deposits and easy slag removal . Designed for use with DC (+) polarity, it offers good operability in flat, horizontal, vertical, and overhead positions . Due to copper's high thermal conductivity, preheating (typically 150-600°C depending on thickness) is recommended for heavy sections to ensure proper fusion and prevent lack-of-fusion defects . The low-hydrogen coating requires proper storage and re-drying before use .

Applications

▪ Ideal for electrical, thermal, and general fabrication applications requiring high conductivity and corrosion resistance, ECu is widely used in:
Electrical Industry: Fabrication and repair of conductive copper bars, electrical connectors, conductor rolls, switchgear components, electrode holders, and flanges requiring reliable current-carrying capacity .

▪ Industrial Fabrication: Construction of heat exchangers, boiler tubes, process piping, and chemical processing equipment handling corrosive media . Also suitable for welding copper castings and fabricating copper sculptures and architectural elements.

▪ Marine Applications: Welding of seawater conduits for ships, marine components, and surfacing of carbon steel parts requiring seawater corrosion resistance .

▪ Dissimilar Metal Joining: Overlay welding and joining of copper to mild steel or stainless steel where high-strength joints are not the primary requirement but electrical conductivity or corrosion protection is needed .

▪ General Maintenance and Repair: Repair of copper components, billet molds, heater elements, and industrial equipment requiring thermal conductivity or corrosion resistance .