Chemical components

Product Description

RBCuZn-A is a premium copper-zinc tin-bearing brazing and welding rod conforming to AWS A5.8/A5.8M standards, commonly known as naval bronze or tin brass filler metal . Featuring a nominal composition of copper (57.0-61.0wt.%), tin (0.25-1.0wt.%), with zinc as the balance, it offers excellent flow characteristics and reliable joint strength for a wide range of applications . This filler metal is suitable for gas welding, braze welding, and carbon arc welding processes, and is ideal for joining copper, steel, cast iron, and various copper alloys, as well as for dissimilar metal fabrication and surfacing applications .

Features

▪ Good Mechanical Properties: Delivers sound deposits with tensile strength of approximately 345-450 MPa and elongation of 25-35%, providing strong, durable joints for general fabrication and repair work . The tin content enhances strength and flow characteristics while maintaining good ductility .

▪ Excellent Flow and Wetting: Exhibits excellent fluidity and wetting action on ferrous and non-ferrous base materials, allowing for proper penetration into narrow joint clearances (typically 0.05-0.15mm) . The relatively low melting range (approximately 866-901°C) minimizes heat input and distortion of base materials .

▪ Versatile Application: Compatible with multiple joining techniques including oxy-fuel gas welding, braze welding, carbon arc welding, and induction/ furnace brazing . Suitable for use with standard brazing fluxes such as AWS Type FB3-A or FB3-C to promote wetting and prevent oxidation .

▪ Good Color Matching: Provides good color match to brass base materials for aesthetic applications where appearance is important. The deposit machines readily and can be polished to match surrounding material .

Applications

▪ Specifically developed for general fabrication, repair, and maintenance applications, RBCuZn-A is widely used in:
▪ General Fabrication: Braze welding of steel, cast iron, copper, and copper alloy assemblies for metal furniture, towel dryers, manifolds, electrical panels, and decorative architectural elements .

▪ Automotive and Transportation: Repair and fabrication of radiators, heater cores, fuel tanks, body panels, exhaust components, and agricultural machinery parts requiring strong, leak-tight joints .

▪ Industrial Maintenance: Repair of broken castings, gear teeth, pump housings, valve components, hydraulic and pneumatic equipment, and machine tool parts .

▪ Plumbing and HVAC: Joining of copper pipe and fittings, repair of leaks in plumbing systems, fabrication of heat exchangers, boilers, and refrigeration components .

▪ Dissimilar Metal Joining: Ideal for joining copper to steel, cast iron to brass, and other dissimilar metal combinations where conventional fusion welding is difficult due to metallurgical incompatibility .

▪ Hardfacing and Surfacing: Build-up of worn surfaces on shafts, bearing journals, and machine components requiring good wear resistance and machinability .