Welding Metal-Unique In Itself
Welding Metal is a process of permanently joining together two pieces of metal by melting them. After the metals have cooled, the process of welding would have merged them into one piece for ever. The most popular methods of welding metal sheet are spot welding, which entails welding metal at a particular point, and seam welding, which helps to weld metal down a line. Spot welding is normally used for metal of around 3 mm thickness. Unfortunately, though, one draw back of spot welding metal is that metals which are not alike in physical and chemical properties cannot be spot welded, and other welding methods need to be resorted to.
Low carbon steels are the best welding metals available. Due to the low percentage of their carbon content, they are easy to weld and do not become hard and brittle on heating. Those steels and alloys which have high carbon content, on the other hand, become very hard, brittle, and cracked once they are welded. These steels and alloys can be tempered before welding. Among stainless steels, Ferric stainless steel and
Austenitic stainless steel in the 300 series are very welder friendly. Martensitic stainless steels, though, being very hard, cannot be easily spot welded. Welding metals like aluminium has to be undertaken on clean, oxide free surfaces, but this requires the use of extremely high power.
There are some considerations that must be followed, especially while welding metal by the spot method. The thickness of the two metal pieces to be welded must be equal. At the outset, the ratio of their thickness must not exceed 3:1. The minimum weld to form distance should be the bend radius coupled with one weld diameter. The distance between the centres of the weld to the edge should be at least twice the diameter of the weld. The spacing between the two welding metals or welds must be ten times the stock thickness. Care should be taken that the electrode is not obstructed from entering the metal. Multiple bends or joints in the welding metals may not weld easily, and this may give rise to a need for special fixtures or accessories in order to fuse them perfectly. As far as possible, it must be tried that the two parts fit into each other naturally, without any need for artificial accessories to fuse them. This will bring out the best results while welding metal.
Whatever method of welding metal may be chosen by the welder to suit the needs of the welds, the equipment that is used should always be of superior quality. Compromise on the quality of the welding machine or its accessories would only spell low grade work, and can create major infrastructural hassles apart from being a black mark on the reputation of the welders. For the best of the best equipment and welding accessories, Longevity can be of service. With its vast collection of welding machines like ArcMate LW-200ACDC , this online equipment store offers the best bargains in town, giving delivery in the best time you can hope for!