| 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 (traditionally known as "Naval Brass")
Material Type: A robust Copper-Zinc alloy (Cu-Zn-Sn system) enriched with tin, providing superior corrosion resistance.
Key Use: Ideal for the meticulous joining of copper alloys, steel, and cast iron in environments where exceptional resistance to seawater and chemical corrosion is imperative.
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): Crucial for improving resistance to dezincification, especially in seawater.
Fe (Iron): Adds significant strength and enhances wear resistance.
Low Pb/Si: Essential for minimizing the risk of hot cracking during the welding process.
As-Deposited:
Tensile Strength: Ranges between 410-510 MPa, highlighting robustness.
Hardness: Measures at 85-105 HB, indicating durability.
Melting Range: Between 885-900°C (solidus-liquidus), showcasing its thermal resilience.
Corrosion Resistance: Remarkable performance against corrosive forces in seawater, marine atmospheres, and environments with mild acids/alkalis.
Marine Engineering: Ideal for ship propellers, seawater piping, and condenser tubes due to its resilience.
Industrial: Perfect for heat exchangers, pump components, and valve bodies, ensuring reliability.
Repair: Optimal for joining and building up manganese bronzes and high-tensile brasses.
Process Compatibility:
Oxy-Acetylene Welding (OAW): The preferred method for cast iron repairs.
Gas Tungsten Arc Welding (GTAW/TIG): Ideal for precision joints using DCEN polarity.
Parameters:
Flux Requirement: Utilize AWS Type FB3-A or a borax-based flux to prevent oxidation.
Preheat: Maintain at 150-260°C for thick sections or cast iron.
Interpass Temp.: Keep ≤200°C to avoid Zn fuming, ensuring safety and efficiency.
Zinc Fume Hazard: To ensure utmost safety during operation, it is imperative to implement local exhaust ventilation (LEV) and to equip yourself with OSHA-approved respirators. This proactive approach safeguards against inhalation hazards, ensuring a safer working environment.
Storage: Store in sealed containers with humidity levels maintained below 40% to effectively prevent oxidation and preserve the integrity of the welding wire.
Form Availability: Offered in versatile forms for diverse applications, including rods with diameters ranging from 3-6 mm, and convenient coils for ease of use.
| 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 unique welding wire is specifically designed for exclusive use with Cu-Zn base metals or in creating dissimilar joints that require exceptional seawater resistance.
For full specifications, refer to AWS A5.8:2021 (Specification for Brazing Filler Metals).
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