| 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: This exquisite product is a Copper-Zinc alloy (Cu-Zn-Sn system) meticulously infused with tin to deliver superior corrosion resistance.
Key Use: It is ideal for joining 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): Delivers enhanced protection against seawater dezincification.
Fe (Iron): Provides increased strength and superb wear resistance.
Low Pb/Si: Reduces the risk of hot cracking during welding processes.
As-Deposited:
Tensile Strength: 410-510 MPa, ensuring robust and reliable performance.
Hardness: 85-105 HB, presenting a balance of rigidity and resilience.
Melting Range: This product smoothly transitions from solid to liquid within a range of 885-900°C.
Corrosion Resistance: Boasts exceptional resistance in seawater, marine atmospheres, and mild acids/alkalis, ensuring long-lasting durability.
Marine Engineering: Perfectly suited for ship propellers, seawater piping, and condenser tubes.
Industrial: Ideal for manufacturing heat exchangers, pump components, and valve bodies.
Repair: Outstanding for joining and building up manganese bronzes and high-tensile brasses.
Process Compatibility:
Oxy-Acetylene Welding (OAW): Especially effective for restoring cast iron.
Gas Tungsten Arc Welding (GTAW/TIG): Suitable for precision joints, employing DCEN polarity.
Parameters:
Flux Requirement: Requires AWS Type FB3-A or borax-based flux to prevent oxidation and ensure the purity of welds.
Preheat: Maintain a temperature of 150-260°C, particularly for thick sections or cast iron, to ensure optimal welding conditions.
Interpass Temp.: Keep it ≤200°C to mitigate Zn fuming, ensuring a clean working environment.
Zinc Fume Hazard: Employ strategic use of local exhaust ventilation (LEV) systems alongside OSHA-compliant respirators to ensure optimal safety and air quality.
Storage: Store in hermetically sealed containers maintaining a humidity level below 40% to effectively prevent oxidation and maintain product integrity.
Form Availability: Available in versatile forms: rods with diameters ranging from 3-6 mm, and convenient coils.
| 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 any nickel alloys. It is specifically engineered for exclusive use with Cu-Zn base metals or in dissimilar joints that demand high performance and exceptional seawater resistance.
For comprehensive specifications and detailed guidelines, refer to AWS A5.8:2021 (Specification for Brazing Filler Metals).
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