E4047 aluminum electrode

E4047 aluminum electrode is aluminum-cored and flux coated stick electrodes for use only with DC welding machines in welding aluminum and its alloys. It is designed for welding aluminum-silicon castings and alloys with high silicon content (up to 12%).

WIRE COMPOSITION (%)

	Si	Fe	Cu	Mn	Mg	Zn
AWS standards	1-13	0.80	0.30	0.15	0.10	0.20
Weld Metal	12	0.15	0.005	0.001	0.02	0.005

 

Conforms to:       AWS A5.3/A5.3M:1999

 Key Features

High Silicon Content: Contains 12% silicon, ideal for welding similar high-silicon aluminum alloys.

Special Flux Coating: Removes surface oxides during welding, ensuring clean and strong welds.

Versatile Welding Methods: Compatible with DC reverse polarity and oxyacetylene welding processes.

Corrosion Resistance: Requires complete slag removal after welding to maintain corrosion resistance.

 Applications:

Aluminum Castings Repair: Ideal for repairing defects in aluminum-silicon castings like engine blocks.

Automotive Parts: Used for welding automotive components requiring high strength and heat resistance.

Thick Plate Welding: Suitable for thick materials (≥10 mm) when preheated to 150-250°C.

Slag Over Slag Technique: Enables multi-layer welding with easy slag removal between passes.

Diameters/Packing

Sizes in available:     2.4mm    3.2  mm    4.0 mm

Available Package:   350mm   in length,  1kg/tube,  20kgs/ carton pack 1000kgs/pallet

Typical Welding Metal Properties

	Tensile Strength (Mpa)	Cold Angle D=2T
Standard Value	≥ 95	——
Typical Value	110-140	120-180

 

Typical Welding Procedures (DCEP)

Rod Diameter	Welding Current
2.4 mm  (3/32”)	50-85 A
3.2 mm (1/8”)	80-110 A
4.0 mm (5/32”)	110-150 A

 

Handling Precautions

1. Storage: Store electrodes in a dry, sealed container to prevent moisture absorption and degradation.
2. Surface cleaning:Clean the workpieces thoroughly before welding and perform post-weld cleaning to remove slags