Chapter 4
Materials and Their Weldability


There are many different definitions concerning the weldability of steel because it often means different things to different people. Simplistically it can be defined as the ability of a material to be welded and still retain its specified properties. This ability to be welded successfully depends on many factors including the type and composition of the material, the welding process used and the mechanical properties required. Poor weldability generally involves some type of cracking problem and this is dependent upon factors such as:

  • Carbon equivalency
  • Classification of steels
  • Alloying elements
  • Material properties
  • Heat treatment of steels

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