Chemical components

Product Description

RBCuZn-C is a premium low-fuming brass brazing and welding rod conforming to AWS A5.8/A5.8M standards, commonly known as low-fuming bronze or naval bronze filler metal . Featuring a nominal composition of copper (58.0-62.0wt.%), tin (0.8-1.1wt.%), iron (0.25-1.0wt.%), manganese (0.25-1.0wt.%), with zinc as the balance, this formulation includes silicon and other fume-suppressing elements to minimize zinc volatilization during welding . This filler metal is suitable for oxy-fuel gas welding, braze welding, and carbon arc welding processes, and is specifically designed for joining steel, cast iron, copper, copper alloys, and dissimilar metal combinations where low fuming and high-strength deposits are required .

Features

▪ Low Fuming Characteristic: Contains carefully controlled fume-suppressing elements (typically silicon and aluminum) that significantly reduce zinc oxide fume generation during welding, providing improved operator visibility and safer working conditions compared to conventional brass fillers .

▪ High Strength Deposits: Delivers sound, dense deposits with tensile strength of approximately 450-550 MPa and good ductility, providing strong, reliable joints for demanding applications . The addition of iron and manganese enhances mechanical properties and wear resistance .

▪ Excellent Flow and Wetting: Exhibits superior fluidity and wetting action on ferrous and non-ferrous base materials, allowing for proper penetration and bond formation . The relatively low melting range (approximately 866-900°C) minimizes heat input, distortion, and metallurgical damage to base materials .

▪ Good Wear Resistance: The optimized composition produces deposits with good resistance to metal-to-metal wear and galling, making it suitable for surfacing applications on bearing surfaces, slides, and machine components .

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

Applications

▪ Specifically developed for fabrication, repair, and maintenance applications requiring strong joints with minimal fuming, RBCuZn-C is widely used in:
▪ Automotive and Transportation: Braze welding of radiator tanks, heater cores, fuel tanks, body panels, exhaust components, and repair of engine blocks, cylinder heads, and transmission housings .

▪ Industrial Maintenance: Repair of broken castings, gear teeth, pump housings, valve bodies, hydraulic cylinders, press components, and machine tool parts requiring strong, machinable deposits .

▪ Dissimilar Metal Joining: Ideal for joining steel to copper, cast iron to brass, stainless steel to bronze, and other dissimilar metal combinations where conventional fusion welding is difficult or impractical .

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

▪ General Fabrication: Braze welding of steel assemblies for metal furniture, electrical enclosures, manifolds, decorative architectural elements, and marine hardware .

▪ Plumbing and HVAC: Repair and fabrication of copper pipe systems, heat exchangers, boilers, and refrigeration components requiring leak-tight joints with good corrosion resistance .