High-Performance RBCuZn-D TIG Welding Rod for Professional 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: A Comprehensive Technical Summary

1. Classification & Overview

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

• Material Type: A high-grade Copper-Zinc alloy (Cu-Zn-Sn system) masterfully engineered with tin for superior corrosion resistance.

• Key Use: Expertly crafted for joining copper alloys, steel,and cast iron, particularly where exceptional seawater and chemical corrosion resistance is paramount.

2. Chemical Composition

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): Augments seawater resistance by counteracting dezincification.

• Fe (Iron): Significantly bolsters strength and enhances wear resistance.

• Low Pb/Si: Effectively reduces the risk of hot cracking during welding operations.

3. Mechanical Properties

• As-Deposited:

  • Tensile Strength: 410-510 MPa, indicative of outstanding durability.

  • Hardness: 85-105 HB, reflecting its robust structural integrity.

  • Melting Range: A precise 885-900°C (solidus-liquidus) for optimal processing.

• Corrosion Resistance: Exemplary in seawater, marine atmospheres,and through mild acids/alkalis.

4. Applications

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

• Industrial: Vital in heat exchangers, pump components, and valve bodies.

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

5. Welding & Brazing Guidelines

• Process Compatibility:

  • Oxy-Acetylene Welding (OAW): Highly recommended for precise repairs of cast iron.

  • Gas Tungsten Arc Welding (GTAW/TIG): Ideal for precision joints using DCEN polarity for superior results.

• Parameters:

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

  • Preheat: Maintain at 150-260°C, especially for dense sections or cast iron.

  • Interpass Temp.: Keep ≤200°C to sidestep Zn fuming and ensure quality.

6. Handling & Safety

• Zinc Fume Hazard: Ensure you prioritize safety by implementing local exhaust ventilation (LEV) and using only OSHA-approved respirators to mitigate zinc fume exposure.

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

• Form Availability: Available in convenient forms such as rods with diameters ranging from 3-6 mm, and also in coils, to suit various welding 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 (e.g., ERCuSi-A) or nickel alloys. This specialized filler is designed exclusively for Cu-Zn base metals or for dissimilar joints that demand exceptional seawater resistance.

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