Tips For Using Aluminum Welding Wire
Aluminum Welding Wire is available in a variety of alloys and packages. It is important to use high-quality wire when welding aluminum, especially thin gauge aluminum (under 14 gauge). The wrong aluminum welding wire can cause problems such as poor fusion and weak welds that are prone to cracking. It also can burn the contact tip and create weld spatter.
Aluminum is a soft metal that requires different considerations when compared to other base metals such as mild steel. These include its lower melting point, higher conductivity and its tendency to burn the surface being welded. The right aluminum welding wire can overcome these issues to give a strong, weldable surface.
Using the right welding electrode can also make all the difference. Aluminum welds require a high degree of control, but when used correctly the result is a strong, durable weld. Aluminum arcs tend to be more unstable than other base metals, and this can lead to difficult fusion and inconsistent slag formation.
A key to successful aluminum welding is to understand how the weld puddle forms. This is not always easy to do, because aluminum has a tendency to burn through the molten puddle and expose a raw area of the base metal that can be very vulnerable to stress. It is important to keep the puddle moving ahead of the weld nozzle to prevent this from happening.
When using spray transfer with MIG welding, it is important to use a longer wire stick out (the distance between the welding wire contact tip and the weld nozzle). It is also recommended to have a good amount of shielding gas to help prevent burning the welding contact tip. This will also reduce the chance of having to clean the contact tip often.
Aluminum welds are also very prone to contamination, and it is important that the work area is kept clean of dirt, oil, grease and other contaminants. This can help to avoid contaminating the weld puddle with these impurities, and it will also help the welder achieve good results when he or she is trying to get a quality weld.
Some of the most popular aluminum welding electrodes are ER5356 and ER4043. These are both used to weld the 5000 series of aluminum alloys and have good ductility, hot crack resistance and corrosion resistance. They are suitable for a wide range of uses, including the fabrication of trailers, railcars, truck and automotive parts and structures.
The ER5356 aluminum welding electrode has a melting range of 1060 degF- 1175 degF and can be used with argon or mixed shielding gases. It has excellent versatility and is a great choice for welders working in aggressive work environments. It has a high magnesium content, which increases its strength and durability, and it produces welds that look extruded and are white after anodizing. It is commonly used for structural frames in shipbuilding and for welding pressure vessels, trailers and truck chassis. It is also very effective in corrosive and saltwater applications.
ER5356 Aluminum Welding Wire5356 is about 5% Magnesium Aluminum filler metal which has high strength, high corrosion resistance and matches the color well with the parent metal after anodizing, recommended for welding casting and forging Al-Mg alloys with maximum 5% Magnesium and parts of wrought alloy of 5000 series, 6000 series, 7000 series, such as 5050, 5052, 5083, 5456, 6005A, 6061,6063,6082,7005 etc.