A weld is defined by the American Welding Society (AWS) as “a localized coalescence (the fusion or growing together of the grain structure of the materials being welded) of metals or nonmetals produced either by heating the materials to the required welding temperatures with or without the application of pressure, or by the application of pressure alone, and with or without the use of filler materials.”
Welding is a joining process that produces coalescence of materials by heating them to the welding temperature, with or without the application of pressure alone, and with or without the use of filler material. This is a permanent joint. It cannot be disassembled easily. The ability of metal to be welded easily is known as weldability.
Weldability is ability or property of a metal due to which it can be easily welded. It depends on the following factors.
- Heat applied during the welding process.
- Welding process, i.e., types of welding used to make the joint.
- Thermal conductivity of the work materials.
- Constituents of the materials.
- Melting point of the parent metal.
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