| Customization: | Available |
|---|---|
| Type: | Rolling Wire |
| Material: | CO2 |
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RBCuZn-D Brass Welding/Brazing Filler Metal: Technical Summary
AWS A5.8 Designation: RBCuZn-D (formerly known as "Naval Brass")
Material Type: Copper-Zinc alloy (Cu-Zn-Sn system) with added tin for enhanced corrosion resistance.
Key Use: Perfect for joining copper alloys, steel, and cast iron where superior seawater and chemical corrosion resistance is critical.
Table 1: Composition (Weight %)
| Cu | Zn | Sn | Fe | Pb | Si | Impurities |
|---|---|---|---|---|---|---|
| 58.0-61.0% | Rem. | 0.5-1.5% | 0.25-1.0% | ≤0.10% | 0.04-0.25% | ≤0.50% total |
Key Elements:
Sn (Tin): Provides excellent resistance to seawater dezincification.
Fe (Iron): Contributes to enhanced strength and exceptional wear resistance.
Low Pb/Si: Significantly minimizes the risk of hot cracking during welding operations.
As-Deposited:
Tensile Strength: 410-510 MPa, ensuring high durability and reliability.
Hardness: 85-105 HB, providing robust and resilient performance.
Melting Range: 885-900°C (solidus-liquidus), supporting versatile application capabilities.
Corrosion Resistance: Exhibits outstanding performance in seawater, marine atmospheres, and withstands mild acids/alkalis effectively.
Marine Engineering: Ideal for ship propellers, seawater piping, condenser tubes.
Industrial: Suitable for heat exchangers, pump components, valve bodies.
Repair: Optimal for joining/building up manganese bronzes and high-tensile brasses.
Process Compatibility:
Oxy-Acetylene Welding (OAW): Particularly preferred for cast iron repairs, ensuring optimal results.
Gas Tungsten Arc Welding (GTAW/TIG): Ideal for precision joints (use DCEN polarity for best outcomes).
Parameters:
Flux Requirement: AWS Type FB3-A or borax-based flux (crucial for preventing oxidation).
Preheat: 150-260°C (essential for thick sections/cast iron).
Interpass Temp.: Maintain ≤200°C to effectively avoid Zn fuming.
Zinc Fume Hazard: Ensure optimal safety by utilizing local exhaust ventilation (LEV) systems coupled with OSHA-approved respirators, effectively mitigating the risks associated with zinc fumes.
Storage: Store in sealed containers with humidity levels maintained below 40% to effectively prevent any oxidation and preserve the quality of the welding rods.
Form Availability: Available in convenient rod sizes ranging from 3 to 6 mm in diameter, as well as in practical coil forms to suit various welding needs.
| Filler | Composition | Key Use Case |
|---|---|---|
| RBCuZn-D | Cu-Zn-Sn-Fe | Marine corrosion resistance |
| RBCuZn-C | Cu-Zn-Si (no Sn/Fe) | General-purpose brazing |
| ERCuSn-A | Cu-Sn (phosphor bronze) | Bronze welding, bearings |
Critical Note:
RBCuZn-D is not interchangeable with silicon bronzes such as ERCuSi-A or nickel alloys. This product is specifically designed for exclusive use with Cu-Zn base metals or for dissimilar joints where seawater resistance is a critical requirement.
For full specifications, refer to AWS A5.8:2021 (Specification for Brazing Filler Metals).
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