The Welding Characteristics of 3xxx and 5xxx Aluminum Alloy

 Aluminum alloy has good corrosion resistance, high specific strength and thermal conductivity, and can maintain good mechanical properties at low temperatures. It is widely used in aerospace, automotive, electrical, chemical, transportation, national defense and other industrial sectors .

To master the weldability characteristics of aluminum alloy, welding operation technology and defect preventive measures, etc., is very important for correctly formulating aluminum alloy welding process, obtaining good joint performance and expanding the application range of aluminum alloys.

The weldability characteristics of aluminum alloy

1. Aluminum and oxygen have a great affinity, so there is always a layer of refractory aluminum oxide film on the surface of aluminum that far exceeds the melting point of aluminum. This oxide film is insoluble in metal. The oxide film should be removed or destroyed during welding or brazing.

2. During fusion welding, the weldability of aluminum alloy is first reflected in the crack resistance. Adding copper, manganese, silicon, magnesium, zinc and other alloying elements to aluminum can obtain alloys with different properties. Various alloying elements have different effects on aluminum alloy welding cracks.

3. The solid and liquid colors of aluminum alloys are not easy to distinguish, and it is difficult to control the temperature of the molten pool during welding.

4. After welding, the weld is prone to porosity, and the welded joint area is prone to softening

Relative weldability of 3xxx and 5xxx aluminum alloys

Welding method	Welding performance and Applicable thickness
	Al-Mn 3xxx	Al-Mg 5xxx		Applicable Thickness
	Welding 3003 aluminum 3004 aluminum	5083 5086	5052 5454	Best scope	Available
TIG	Excellent	Excellent	Excellent	1-10	0.9-25
MIG	Excellent	Excellent	Excellent	>8	>4
Pulse MIG welding	Excellent	Excellent	Excellent	>2	1.6-8
Gas welding	Excellent	Very poor	Relatively poor	0.5-10	0.3-25
Electrode arc welding	Good	Very poor	Relatively poor	3-8	-
Resistance welding	Good	Excellent	Excellent	0.7-3	0.1-4
Plasma arc welding	Excellent	Excellent	Excellent	1-10	-
Electron beam welding	Excellent	Excellent	Excellent	3-75	>3

Haomei Aluminum has different aluminum alloys like the popular 5083 aluminum plate, 5052 aluminum sheet, 3003 aluminum plate, 5086 aluminum alloy. Welcome to leave message below to inquire what you need.

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