Forgings need to be consistent with each piece, without any porosity, inclusions or other defects. The components produced by this method have a high ratio of strength to weight. These components are usually used in aircraft structures.
Forging has the advantages of stretchable length and shrinkable cross section; shrinkable length and stretchable cross section; variable length and variable cross section. The types of forgings are: free forging/hand forging, hot die forging/precision forging, upsetting, roll forging and die forging.