How to select the right Welding System for a specific job?

Welding is the process of joining two metals placed together by heating them to melting point. In electric welding, the heat required for welding process is obtained by the use of electrical energy.

Factors Considered While Selecting a Welding System for a Particular Job

There are different materials or metals to be welded and different types of welds are required. Therefore, depending upon the metal, its dimensions, and requirements, different welding systems are selected.

The following factors are to be considered while evaluating an appropriate welding system to complete a specific job −

  • Types of material (or metal) being welded

  • Thickness of the material.

  • The welding position

  • Type of welding power source

  • The amount of current available at the welding location

  • Time required, and

  • Working conditions, etc.

Welding System for Different Jobs

The following table shows the selected welding system for a particular job −

Nature of JobWelding System
Two thick materials of low conductivity.

Two thick materials of high conductivity.

Two materials of different conductivity.

Thin metals.
Resistance welding system by controlling the contact resistance and suitable electrodes.
Joining copper metal and its alloys.Carbon arc welding system
Welding work of carbon steel, stainless steel, alloy steel, aluminum, etc.Atomic hydrogen arc welding system
End to end joints for roads, tubes, wires, etc.Butt welding system
Two metallic parts (electrode of same metal)Metal arc welding system
Welding work of aluminum, magnesium and its alloys, stainless steel, etc.Helium or argon arc welding system
Punched, form or stamped partsProjection welding system
Localized welding (not air-tight and water proof)Spot welding system
Leak proof joints of tanks, transformer tanks, compressor tanks, gasoline tanks, air-craft tanks, etc.Seam welding system