| Customization: | Available |
|---|---|
| Type: | Rolling Wire |
| Material: | CO2 |
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Technical Overview: RBCuZn-D Brass Welding/Brazing Filler Metal
AWS A5.8 Designation: RBCuZn-D (also known as "Naval Brass")
Material Type: A robust Copper-Zinc alloy (Cu-Zn-Sn system), enhanced with tin for superior corrosion resistance.
Key Use: Perfect for seamless joining of copper alloys, steel, and cast iron where exceptional seawater and chemical corrosion resistance 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): Significantly boosts seawater dezincification resistance.
Fe (Iron): Adds invaluable strength and wear resistance.
Low Pb/Si: Reduces the risk of hot cracking during welding.
As-Deposited:
Tensile Strength: Impressive 410-510 MPa
Hardness: Durable 85-105 HB
Melting Range: Between 885-900°C (solidus-liquidus)
Corrosion Resistance: Outstanding in seawater, marine atmospheres, and against mild acids/alkalis.
Marine Engineering: Ideal for ship propellers, seawater piping, condenser tubes.
Industrial: Essential for heat exchangers, pump components, valve bodies.
Repair: Expertly joining/building up manganese bronzes and high-tensile brasses.
Process Compatibility:
Oxy-Acetylene Welding (OAW): Optimal for precise cast iron repairs.
Gas Tungsten Arc Welding (GTAW/TIG): Excellent for precision joints (DCEN polarity recommended).
Parameters:
Flux Requirement: Utilize AWS Type FB3-A or borax-based flux (essential to prevent oxidation).
Preheat: Maintain at 150-260°C for thick sections/cast iron applications.
Interpass Temp.: Keep ≤200°C to prevent Zn fuming.
Zinc Fume Hazard: Utilize local exhaust ventilation (LEV) systems and ensure the use of OSHA-approved respirators to protect against zinc fume exposure.
Storage: Maintain in sealed containers with humidity levels below 40% to effectively prevent oxidation and ensure longevity.
Form Availability: Offered in rods with diameters ranging from 3-6 mm, as well as in coils for versatile usage.
| 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 premium filler is exclusively designed for Cu-Zn base metals or dissimilar joints where seawater resistance is crucial.
For full specifications, refer to AWS A5.8:2021 (Specification for Brazing Filler Metals).
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