XINXIN WELDING Copper-Aluminum Flux Cored Brazing Rods

Complete Guide for Copper-to-Aluminum Brazing Applications

Why Copper-Aluminum Brazing Is Difficult

Joining copper and aluminum is challenging because aluminum forms a dense oxide layer while copper dissipates

heat quickly. Conventional filler metals often suffer from poor wetting, weak bonding, air leakage, increased electrical

resistance, and cracking after thermal cycling.

What Is XINXIN WELDING Copper-Aluminum Flux Cored Brazing Rod?

An integrated composite brazing filler with a zinc-aluminum alloy outer sheath and a high-purity white cesium-based

flux core. The built-in flux activates during heating, removes oxides, and promotes excellent wetting without separate flux

application.

Key Advantages

• Built-in flux simplifies the brazing process.

• Powerful oxide removal on copper, brass and aluminum.

• Non-corrosive residue with no post-cleaning required.

• Low-temperature brazing minimizes base metal damage.

• Compatible with flame, induction, furnace and automated brazing.

• Excellent airtightness, conductivity and mechanical strength.

Product Series

XX-FC0215H – High Cesium Grade for electrical conductivity.

XX-FC0215K – Medium Cesium Grade for pressure-bearing pipelines.

XX-FC0215 / XX-FC0215A – Universal Grade for mass production.

XX-FC0215T / XX-FC0215N – Cesium-Free Economic Grade.

XX-FC4045-CuAl – Special Grade for aluminum-to-stainless steel.

Industries

HVAC & Refrigeration, New Energy Vehicles, Renewable Energy, Electronics & Communication, Industrial Manufacturing.

Technical Specifications

Forms: Straight rods, wire coils, preformed rings, custom shapes.

Diameters: 1.6 mm, 2.0 mm, 2.4 mm (custom sizes available).

Why Choose XINXIN WELDING

Stable quality, engineering support, OEM service, customized formulations, fast delivery, global export experience,

and free sample evaluation.

Frequently Asked Questions

Q: Can I braze copper to aluminum without separate flux?

A: Yes. The built-in cesium-based flux activates automatically.

Q: Is cleaning required?

A: Normally no. Residue is non-corrosive.

Q: Which heating methods are supported?

A: Flame, induction, furnace and automated brazing systems.

Q: Can products be customized?

A: Yes. Diameter, flux ratio, preforms and packaging are available.

Contact Message

XINXIN WELDING provides professional copper-aluminum brazing solutions for HVAC, EV thermal management,

refrigeration and industrial heat exchangers.