Advanced RBCuZn-D CO2 Welding Wire for High-Performance Applications

• Customization: Available
• Type: Rolling Wire
• Material: CO2
• Model NO.: RBCuZn-D
• Flux Containing: Not Containing Flux
• Slag Characteristic: Acidic
• Extended Length: >20mm
• Transport Package: 1kg/5kg/12.5/15kg/Spool
• Specification: 0.6/0.8/1.0/1.2/1.6/2.0/3.2/4.0mm
• Trademark: Jiuzhou
• Origin: China
• HS Code: 7223000
• Production Capacity: 200000kg/Year

Product Description

RBCuZn-D Brass Welding/Brazing Filler Metal: An In-Depth Technical Summary

1. Classification & Overview: A Detailed Insight

• AWS A5.8 Designation: RBCuZn-D (formerly celebrated as "Naval Brass")

• Material Type: A robust Copper-Zinc alloy (Cu-Zn-Sn system) enriched with tin for superior corrosion resistance.

• Key Use: Expertly facilitates Joining of copper alloys, steel, and cast iron in environments where seawater and chemical corrosion resistance is paramount.

2. Chemical Composition: A Comprehensive Breakdown

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): Crucial for improving resistance to seawater dezincification.

• Fe (Iron): Vital for enhancing strength and wear resistance.

• Low Pb/Si: Essential for minimizing the risk of hot cracking during welding.

3. Mechanical Properties: Performance at Its Best

• As-Deposited:

  • Tensile Strength: Ranges from 410-510 MPa, ensuring robust performance.

  • Hardness: Between 85-105 HB, promising durability.

  • Melting Range: Spanning 885-900°C (solidus-liquidus), ideal for diverse applications.

• Corrosion Resistance: Exhibits excellent resilience in seawater, marine atmospheres, and mild acids/alkalis.

4. Applications: Broadening Horizons

• Marine Engineering: Perfect for ship propellers, seawater piping, condenser tubes.

• Industrial: Ideal for heat exchangers, pump components, valve bodies.

• Repair: Optimal for joining/building up manganese bronzes and high-tensile brasses.

5. Welding & Brazing Guidelines: Mastery in Process

• Process Compatibility:

  • Oxy-Acetylene Welding (OAW): Preferred choice for intricate cast iron repairs.

  • Gas Tungsten Arc Welding (GTAW/TIG): Perfect for precision joints, ensuring accuracy (use DCEN polarity).

• Parameters:

  • Flux Requirement: AWS Type FB3-A or borax-based flux is mandatory to effectively prevent oxidation.

  • Preheat: Required at 150-260°C, especially for thick sections/cast iron.

  • Interpass Temp.: Maintain ≤200°C to effectively avoid Zn fuming.

6. Handling & Safety

• Zinc Fume Hazard: Ensure a safe working environment by employing local exhaust ventilation (LEV) and using OSHA-approved respirators to protect against inhalation.

• Storage: Store in sealed containers with humidity levels kept below 40% to effectively prevent oxidation and maintain product integrity.

• Form Availability: Available in versatile forms such as rods (3-6 mm diameter) and coils to meet diverse application needs.

7. Comparison to Similar Fillers

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 like ERCuSi-A or with nickel alloys. It is specifically designed for exclusive use with Cu-Zn base metals or for dissimilar joints that demand exceptional seawater resistance.

For full specifications, refer to AWS A5.8:2021 (Specification for Brazing Filler Metals) for comprehensive guidelines and detailed information..