| Customization: | Available |
|---|---|
| Type: | Rolling Wire |
| Material: | CO2 |
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RBCuZn-D Brass Welding/Brazing Filler Metal: Technical Summary - An In-Depth Exploration
AWS A5.8 Designation - Setting the Standard for Excellence: RBCuZn-D (formerly known as 'Naval Brass') - A Legacy of Reliability
Material Type - Built to Endure and Adapt: Copper-Zinc alloy (Cu-Zn-Sn system) with added tin for enhanced corrosion resistance, making it the ideal choice for challenging environments.
Key Use - The Quintessential Solution for Critical Projects: Joining copper alloys, steel, and cast iron where seawater/chemical corrosion resistance is critical, ensuring long-lasting durability.
Table 1: Composition (Weight %) - Delving into the Ingredients of Excellence
| 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 - The Building Blocks of Superior Performance:
Sn (Tin): Improves seawater dezincification resistance, offering robust protection against harsh marine conditions.
Fe (Iron): Enhances strength and wear resistance, providing unparalleled longevity.
Low Pb/Si: Minimizes hot cracking during welding, ensuring seamless and reliable joints.
As-Deposited - A Showcase of Mechanical Prowess:
Tensile Strength: 410-510 MPa, offering formidable resistance to pulling forces.
Hardness: 85-105 HB, ensuring resilience against surface wear and deformation.
Melting Range: 885-900°C (solidus-liquidus) - Perfect for precise thermal applications.
Corrosion Resistance: Excellent in a range of environments, including seawater, marine atmospheres, and mild acids/alkalis, making it the steadfast choice for demanding settings.
Marine Engineering: Ship propellers, seawater piping, condenser tubes - Engineered for the seas.
Industrial: Heat exchangers, pump components, valve bodies - Keeping industries running smoothly.
Repair: Joining/building up manganese bronzes and high-tensile brasses- Restoring excellence with every application.
Process Compatibility - Tailored for Diverse Techniques:
Oxy-Acetylene Welding (OAW): Preferred for cast iron repairs, ensuring strength and integrity.
Gas Tungsten Arc Welding (GTAW/TIG): For precision joints (use DCEN polarity), providing accuracy and finesse.
Parameters - Guiding Precision and Perfection:
Flux Requirement: AWS Type FB3-A or borax-based flux (mandatory to prevent oxidation), safeguarding against deterioration.
Preheat: 150-260°C (for thick sections/cast iron), ensuring optimal preparation for superior results.
Interpass Temp.: ≤200°C to avoid Zn fuming, ensuring a clean and safe process.
Zinc Fume Hazard: Ensure robust safety measures with the use of local exhaust ventilation (LEV) and OSHA-approved respirators to maintain a secure working environment.
Storage: Store in sealed containers under conditions of less than 40% humidity to effectively prevent any unwanted oxidation.
Form Availability: Available in versatile forms such as rods with diameters ranging from 3-6 mm and convenient coils to suit diverse project 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 other fillers like silicon bronzes (e.g., ERCuSi-A) or nickel alloys. It is specially designed for exclusive use with Cu-Zn base metals or for crafting dissimilar joints where superior seawater resistance is essential.
For comprehensive specifications, refer to AWS A5.8:2021 (Specification for Brazing Filler Metals).
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