Types of welding

Types of welding

1. Welding is the permanent bonding of metals by the action of heat

   • Autogenous: Filler material is not required
   • • Heterogeneous: Filler material has different composition as base metal.
   • • Homogeneous: Filler material has the same composition as base metal.

2. If the base material does not melt during the welding, welding can be divided into

   • Soft welding (soldering)
   • Strong welding (brazing)

3. If the base material melts during the welding, welding is know as fusion welding and it can be divided into

   • Oxyacetylene welding
   • Arc welding
     • Shielded metal arc welding
     • ◦ Gas metal arc welding (GMAW) / Metal inert gas (MIG)
     • Gas tungsten arc welding (GTAW) / Tungsten inert gas (TIG)
   • Resistance spot welding (RSW)

4. By means of welding, two or more materials can be bond each other through joints. Welding joints can be categorized into

   • Lap joints
   • Edge joints
   • T-joints
   • Butt joints
   • Corner joints