Premium Quality RBCuZn-D Welding Rod for Superior Joint Strength

• 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: Technical Summary

1. Classification & Overview

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

• Material Type: Copper-Zinc alloy (Cu-Zn-Sn system) with added tin for enhanced corrosion resistance.

• Key Use: Expertly crafted for Joining copper alloys, steel, and cast iron in environments where seawater and chemical corrosion resistance are of utmost importance.

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): Improves seawater dezincification resistance, ensuring longevity and durability.

• Fe (Iron): Enhances strength and wear resistance, providing robust performance.

• Low Pb/Si: Minimizes hot cracking during welding for seamless applications.

3. Mechanical Properties

• As-Deposited:

  • Tensile Strength: 410-510 MPa, offering formidable strength.

  • Hardness: 85-105 HB, balancing toughness with flexibility.

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

• Corrosion Resistance: Demonstrates excellent resilience in seawater, marine atmospheres, and mild acids/alkalis, securing its role in challenging conditions.

4. Applications

• Marine Engineering: Ideal for Ship propellers, seawater piping, and condenser tubes.

• Industrial: Heat exchangers, pump components, valve bodies, showcasing versatility in utility.

• Repair: Effective in Joining/building up manganese bronzes and high-tensile brasses.

5. Welding & Brazing Guidelines

• Process Compatibility:

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

  • Gas Tungsten Arc Welding (GTAW/TIG): For precision joints, use DCEN polarity for optimal results.

• Parameters:

  • Flux Requirement: Use AWS Type FB3-A or borax-based flux, mandatory to prevent oxidation and ensure high-quality welds.

  • Preheat: Maintain 150-260°C for thick sections/cast iron to facilitate effective welding.

  • Interpass Temp.: Keep ≤200°C to avoid Zn fuming, ensuring a safe work environment.

6. Handling & Safety

• Zinc Fume Hazard: Ensure a safe working environment by utilizing local exhaust ventilation (LEV) systems. Equip your team with OSHA-approved respirators to protect against hazardous zinc fumes.

• Storage: Maintain the integrity of the welding rods by storing them in sealed containers with humidity levels below 40% to effectively prevent oxidation and extend product lifespan.

• Form Availability: Available in versatile forms such as rods ranging from 3-6 mm in diameter and convenient coils, catering to diverse 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 like ERCuSi-A or various nickel alloys. This product is specifically designed for exclusive use with Cu-Zn base metals or for creating dissimilar joints that demand exceptional seawater resistance.

For full specifications, refer to AWS A5.8:2021 (Specification for Brazing Filler Metals).