| 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 (a.k.a. 'Naval Brass')
Material Type: A superior Copper-Zinc alloy (Cu-Zn-Sn system) with tin added to boost corrosion protection.
Key Use: Ideal for joining copper alloys, steel, and cast iron when high resistance to seawater and chemical corrosion is crucial.
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): Enhances dezincification resistance in marine environments.
Fe (Iron): Increases structural strength and wear resistance.
Low Pb/Si: Reduces the risk of hot cracking during the welding process.
As-Deposited:
Tensile Strength: 410-510 MPa, providing exceptional durability.
Hardness: 85-105 HB, ensuring robust performance.
Melting Range: 885-900°C, ensuring a broad working range.
Corrosion Resistance: Outstanding in seawater, marine atmospheres, and mild acids/alkalis.
Marine Engineering: Perfect for ship propellers, seawater piping, and condenser tubes.
Industrial: Ideal for heat exchangers, pump components, and valve bodies.
Repair: Excellent for joining/building up of manganese bronzes and high-tensile brasses.
Process Compatibility:
Oxy-Acetylene Welding (OAW): Optimal for repairing cast iron applications.
Gas Tungsten Arc Welding (GTAW/TIG): Perfect for precision joints; use DCEN polarity for best results.
Parameters:
Flux Requirement: Use AWS Type FB3-A or borax-based flux, mandatory to prevent oxidation.
Preheat: 150-260°C, essential for thick sections/cast iron.
Interpass Temp.: ≤200°C, crucial to avoid zinc fuming.
Zinc Fume Hazard: Ensure the highest level of safety by utilizing local exhaust ventilation (LEV) and OSHA-approved respirators. This proactive approach protects against zinc fumes, safeguarding both health and efficiency.
Storage: For optimal preservation, store in sealed containers maintaining less than 40% humidity to effectively prevent oxidation and ensure product integrity.
Form Availability: Available in versatile forms including rods with 3-6 mm diameter and convenient coils, providing flexibility for 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. It is specifically designed for exclusive use with Cu-Zn base metals or for dissimilar joints necessitating seawater resistance, ensuring optimal performance.
For full specifications, refer to AWS A5.8:2021 (Specification for Brazing Filler Metals) for comprehensive guidelines and standards..
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