| 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 high-performance Copper-Zinc alloy (Cu-Zn-Sn system) incorporates tin, significantly boosting its corrosion resistance, making it ideal for challenging environments.
Key Use: Perfect for Joining copper alloys, steel, and cast iron in situations where robust seawater and chemical corrosion resistance is essential.
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): Remarkably enhances resistance to seawater dezincification, a critical feature for marine applications.
Fe (Iron): Significantly bolsters strength and provides superior wear resistance.
Low Pb/Si: Expertly minimizes hot cracking incidents during the welding process, ensuring seamless joints.
As-Deposited:
Tensile Strength: A robust 410-510 MPa, providing exceptional structural integrity.
Hardness: Rated at 85-105 HB, ensuring durability and toughness.
Melting Range: A precise 885-900°C (solidus-liquidus), perfect for consistent application.
Corrosion Resistance: Outstanding performance in seawater, marine atmospheres, and resilient against mild acids/alkalis.
Marine Engineering: Ideal for ship propellers, seawater piping, and condenser tubes, thanks to its superior anti-corrosion properties.
Industrial: Suitable for heat exchangers, pump components, and valve bodies, ensuring longevity and reliability.
Repair: Excellent for joining/building up manganese bronzes and high-tensile brasseswith precision.
Process Compatibility:
Oxy-Acetylene Welding (OAW): Preferred choice for efficient cast iron repairs.
Gas Tungsten Arc Welding (GTAW/TIG): Optimal for precision joints, recommended with DCEN polarity for best results.
Parameters:
Flux Requirement: Essential AWS Type FB3-A or borax-based flux to prevent oxidation and ensure a smooth finish.
Preheat: Recommended at 150-260°C, especially for thick sections or cast iron applications.
Interpass Temp.: Keep at ≤200°C to effectively prevent Zn fuming.
Zinc Fume Hazard: Implement effective local exhaust ventilation (LEV) alongside OSHA-approved respirators to safeguard against zinc fume exposure.
Storage: Use sealed containers maintained at less than 40% humidity to prevent any risk of oxidation, ensuring the longevity and performance of the product.
Form Availability: Available in versatile forms such as rods with diameters ranging from 3-6 mm, and convenient coils for diverse industrial applications.
| 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 other fillers like silicon bronzes (e.g., ERCuSi-A) or nickel alloys. Designed for exclusive use with Cu-Zn base metals or specific dissimilar joints requiring superior seawater resistance.
For comprehensive specifications, please refer to AWS A5.8:2021 (Specification for Brazing Filler Metals).
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