Products
RBCuZn-D
AWS:
AWS A5.8
Category:
Description
Chemical components
| Cu | Al | Fe | Mn | Ni | P | Pb | Si | Sn | Zn | Ti | C | S | Other Total |
| 46.0-50.0 | 0.01 | — | — | 9.0-11.0 | 0.25 | 0.05 | 0.04-0.25 | — | Rem | — | — | — | 0.50 |
Product Description
RBCuZn-D (Nickel Silver) is a high-strength copper-zinc-nickel brazing filler metal complying with AWS A5.8 standard (equivalent to ISO24373 Cu7730, GB/T9460 SCu7730, UNS C77300). Typical composition: 46.0-50.0% Cu, 9.0-11.0% Ni, 0.04-0.25% Si, with balance Zn. Features excellent corrosion resistance, high strength, and good machinability. Used as a cost-effective alternative to silver brazing alloys where higher brazing temperatures are acceptable. Suitable for torch brazing, oxy-fuel welding, and brazing of tungsten carbide, steel, nickel alloys, and cast iron. A neutral or slightly oxidizing flame is recommended. Requires borax-based flux.
Features
▪ High Strength: Tensile strength 385-415 MPa (56-60 ksi) with good ductility (25% elongation).
▪ Nickel Enhanced: 10% nickel addition provides excellent corrosion resistance, particularly in marine environments.
▪ Good Machinability: Readily machinable without work hardening, suitable for post-braze finishing.
▪ High Temperature: Melting range 890-935°C (1634-1715°F), higher than RBCuZn-C.
▪ Tungsten Carbide Specialist: Designed for brazing tungsten carbide tools and components.
▪ Excellent Color Match: Silver-white appearance provides good color match with steel and nickel alloys.
Applications
▪ Carbide Tooling: Tungsten carbide cutting tools, drill bits, mining tools, and wear-resistant parts.
▪ Cast Iron: Cast iron repairs, gray cast iron brazing, and ductile iron components.
▪ Steel Components: Gear teeth, bearing bushings, valve seats, and steel-to-steel brazing.
▪ Nickel Alloys: Nickel-based alloy brazing and stainless steel components.
▪ Surface Overlay: Hard facing and wear-resistant overlay on cast steel and cast iron.
▪ Dissimilar Metal Joining: Steel-to-nickel alloy, steel-to-cast iron, and copper-to-steel joints.
Company Introduction
Hangzhou Lin'an Dayang Welding Materials Co., Ltd., a professional welding materials manufacturer founded in 1995, adheres to the core philosophy of "Innovative R&D, Precision Manufacturing, Meticulous Service".
With over 30 years of industry expertise, we have continuously increased investment in production upgrading and technological R&D, solidifying our reputation as a trusted supplier of industrial welding consumables globally.
Production Capacity & Product Strength
Equipped with multiple advanced automated production lines, we boast an annual output of 5,000 tons of premium welding products.
Our core portfolio covers nickel-based welding wires, stainless steel welding wires, flux-cored welding wires and high-performance specialty electrodes.
Backed by a professional R&D team with multiple patents, we also provide tailored OEM/ODM welding solutions to meet clients’ diverse application needs.
After-sales service process
FAQS
What is the difference between RBCuZn-D and RBCuZn-C?
RBCuZn-D contains 10% nickel and has higher strength (385-415 MPa) and better corrosion resistance, with melting point 890-935°C. RBCuZn-C is nickel-free with lower strength (385 MPa) and lower melting point (866-888°C). RBCuZn-D is preferred for tungsten carbide brazing and marine applications, while RBCuZn-C is for general-purpose brazing.
What flux is required for RBCuZn-D brazing?
Borax-based flux or bronze brazing flux is required for bare rods to remove oxides. Flux-coated rods are available for convenience.
What brazing temperature range is recommended?
921-955°C (1690-1750°F) for torch brazing. Use a neutral or slightly oxidizing flame to minimize zinc evaporation and ensure proper wetting.
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