What is the correct technique for brazing with the Harris ALUXCOR 4047 Aluminum Flux Cored Brazing Alloy F15.3 2.0mm x 500mm x 5kg - A4047CWC20500?

Proper joint preparation is critical for sound brazed joints: clean all joint surfaces to remove oil, oxide, and scale using emery cloth or a wire brush. Maintain proper joint clearance for capillary flow. Heat the base metal — not the filler rod — to brazing temperature before touching the rod to the joint. The heat-to-flow sequence ensures proper capillary action. Allow the joint to air cool before quenching to avoid thermal shock cracking.

Harris ALUXCOR 4047 Aluminum Flux Cored Brazing Alloy F15.3 2.0mm x 500mm x 5kg - A4047CWC20500

Q: What is the Harris ALUXCOR 4047 Aluminum Flux Cored Brazing Alloy F15.3 2.0mm x 500mm x 5kg - A4047CWC20500 used for?

The Harris ALUXCOR 4047 Aluminum Flux Cored Brazing Alloy F15.3 2.0mm x 500mm x 5kg - A4047CWC20500 is a brazing filler metal used in torch brazing, induction brazing, and furnace brazing applications. Brazing produces strong, leak-tight joints on a wide range of base metals at temperatures above 840°F (450°C) but below the base metal's melting point. Select the filler alloy based on base metal type, service temperature, and required joint strength.

Q: What diameter is the Harris ALUXCOR 4047 Aluminum Flux Cored Brazing Alloy F15.3 2.0mm x 500mm x 5kg - A4047CWC20500 available in?

The Harris ALUXCOR 4047 Aluminum Flux Cored Brazing Alloy F15.3 2.0mm x 500mm x 5kg - A4047CWC20500 is available in 5/64 diameter. Rod or wire diameter selection depends on joint gap clearance and feeding method: narrow-gap joints with tight clearances benefit from thinner rod (easier to feed into the joint), while larger-gap joints require more filler and may work better with thicker rod. Pre-placed rings or preforms are available for production brazing of consistent joint geometries.

Q: Does the Harris ALUXCOR 4047 Aluminum Flux Cored Brazing Alloy F15.3 2.0mm x 500mm x 5kg - A4047CWC20500 require brazing flux?

A compatible brazing flux is required for most brazing operations to prevent oxidation on base metal and filler surfaces during heating. Apply flux to joint surfaces before heating. After brazing, remove all flux residue with warm water and a brush — flux residue is corrosive and will attack the joint over time if not cleaned.

Q: What package size is the Harris ALUXCOR 4047 Aluminum Flux Cored Brazing Alloy F15.3 2.0mm x 500mm x 5kg - A4047CWC20500 available in, and how should I store it?

Brazing alloys are sold in various rod lengths and weights — common sizes include 1 lb, 5 lb, and 25 lb packages. Store in a dry location free from oil and solvent contamination. Silver brazing alloys are stable at room temperature and do not require special controlled-atmosphere storage. Keep surfaces clean to ensure proper flux adhesion and capillary flow.

SKU: A4047CWC20500

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ALUXCOR® 4047 15.3 flux-cored zinc aluminum brazing alloy 2mm X 500mm X 5kg tube.

Overview

Harris ALUXCOR 4047 Aluminum Flux Cored Brazing Alloy F15.3 2.0mm x 500mm x 5kg - A4047CWC20500

ALUXCOR 4047 F15.3 Flux Cored brazing wire is designed for manual and semi-automatic aluminum flame brazing. A common application is brazing HVAC aluminum components including return bends, headers, tube assemblies, and distributors. The flux-core eliminates the need for a separate flux application and the core cross section is designed to release a measured amount of flux into the capillary. This ensures good oxidation protection and suitable capillary fill by the melted aluminum metal. ALUXCOR 4047 is available with different flux compositions. Formula 15.3 is a cesium fluoroaluminate blend that lowers flux activity temperature and corresponding brazing temperature. Inclusion of this compound also allows brazing of magnesium containing base metals like 6063. The flux chemistry and ratio is designed to provide brazing characteristics engineered for specific applications. This composition is non-hygroscopic, so post braze flux residue does not need to be removed. Conforms to the EU Reach & RoHS directive.

Features

A4047 F15.3 zinc-aluminum Flux Cored brazing alloy
For manual and semi-automatic aluminum flame brazing
Flux inner core means no manual flux application is required providing significant cost savings
Releases designated amount of flux into capillar
Ensures good oxidation protection and capillary fill
Brazing temperature lowered, due to this formula's lower flux activity temperature
Non-hygroscopic, so no flux removal needed
Typical application is brazing HVAC aluminum components including return bends, headers, tube assemblies, and distributors.
The cesium fluoroaluminate formula allows brazing of base metals with magnesium
Conforms to the EU Reach & RoHS directive.

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