E4043 Aluminum Stick Electrodes
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Blue Demon E4043 Aluminum Covered Electrodes
E4043 is a general purpose aluminum electrode for arc welding aluminum alloys. The arc is stable and operates at low temperatures with a minimum of spatter and fuming. The welds are strong, dense, and free of porosity on both production and maintenance applications. E4043 is a great choice when welding heat-treated aluminum parts. This welding rod may also be used in brazing applications.
Typical Applications
- Welding aluminums alloyed with copper, silicon and manganese
- Excellent for joining dissimilar grades of aluminum
Recommended Parameters
| Electrode Diameter | Amperage Range (Amps) | Recommended Polarity | Position |
| 3/32" (2.4 mm) | 50 – 80 A | DCEP (Direct Current Electrode Positive) | Flat, Horizontal |
| 1/8" (3.2 mm) | 80 – 130 A | DCEP (Direct Current Electrode Positive) | Flat, Horizontal |
| 5/32" (4.0 mm) | 120 – 170 A | DCEP (Direct Current Electrode Positive) | Flat, Horizontal |
E4043 Stick Electrode Welding Tips
- Polarity Matters: You should always use DCEP (Reverse Polarity). This provides the "cleaning action" necessary to break through the tough aluminum oxide layer that sits on the surface of the metal.
- Travel Speed: Aluminum stick welding is fast. Once the arc starts, the rod consumes rapidly. Be prepared to move about twice as fast as you would with steel (like E6013).
- Moisture Sensitivity: E4043 electrode coatings are susceptible to picking up atmospheric moisture. Always keep your electrodes in a sealed container or a rod oven. Damp electrodes may produce excessive spatter or porosity.
- Preheating: For aluminum thicker than 1/8", preheating the workpiece to about 200°C (approx. 400°F) will help prevent the "cold start" look and ensure better penetration.
Available Options and Part Numbers
| Diameter | Length | Classification | Package Size | Part Number |
|
3/32" (2.4 mm)
|
12" (304 mm) | E4043 | 1 lb. | E4043-332-01 |
| 12" (304 mm) | E4043 | 5 lb. | E4043-332-05 | |
|
1/8" (3.2 mm)
|
14" (355 mm) | E4043 | 1 lb. | E4043-125-01 |
| 14" (355 mm) | E4043 | 5 lb. | E4043-125-05 | |
|
5/32" (4.0 mm)
|
14" (355 mm) | E4043 | 1 lb. | E4043-532-01 |
| 14" (355 mm) | E4043 | 5 lb. | E4043-532-05 |
Blue Demon E4043 Specifications