Durable RBCuZn-D Filler Welding Wire for Industrial 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: Technical Summary

1. Classification & Overview

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

• Material Type: A cutting-edge Copper-Zinc alloy (Cu-Zn-Sn system) enriched with tin, delivering superior resistance against corrosion.

• Key Use: Ideal for robust Joining copper alloys, steel, and cast iron where optimal seawater and chemical corrosion resistance is essential.

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): Enhances the alloy's resistance against seawater-induced dezincification.

• Fe (Iron): Augments strength and boosts wear resistance, ensuring longevity.

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

3. Mechanical Properties

• As-Deposited:

  • Tensile Strength: 410-510 MPa, ensuring a balance of strength and flexibility.

  • Hardness: 85-105 HB, providing durability for demanding applications.

  • Melting Range: 885-900°C (solidus-liquidus), offering a broad working range.

• Corrosion Resistance: Exceptional in seawater, marine atmospheres, and resistant to mild acids/alkalis, ensuring reliability under harsh conditions.

4. Applications

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

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

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

5. Welding & Brazing Guidelines

• Process Compatibility:

  • Oxy-Acetylene Welding (OAW): The preferred method for cast iron repairs.

  • Gas Tungsten Arc Welding (GTAW/TIG): Perfect for precision joints; utilize DCEN polarity for optimal results.

• Parameters:

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

  • Preheat: Maintain at 150-260°C for thick sections/cast iron to enhance performance.

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

6. Handling & Safety

• Attention: Zinc Fume HazardGuideline: Ensure Safety with Local Exhaust Ventilation (LEV) and OSHA-Approved Respirators

• Optimal Storage SolutionsRecommendation: Store in Sealed Containers with Less Than 40% Humidity to Prevent Oxidation.

• Versatile Form AvailabilityOptions: Available in Rods (3-6 mm diameter) and Coils for Diverse Applications.

7. Comparative Analysis with 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

Important: Critical NoteEssential Reminder:
The RBCuZn-D Filler cannot be substituted for silicon bronzes (such as ERCuSi-A) or nickel alloys. It is uniquely suited for Cu-Zn base metals or for dissimilar joints requiring resistance to seawater.

For comprehensive specifications and standards, please refer to AWS A5.8:2021, the Specification for Brazing Filler Metals.This document provides detailed guidelines.