Below is a list of Stainless Steel Forgings manufacturers from Diamond Bar, California. Stainless steel forgings are the product of a metallurgical process in which stainless steel is given a particular shape by the application of a strong compressive force. The pressure applied during the metal forging process shapes the stainless steel and also causes plastic deformation in its grain structure, so that the grain flow follows the shape of the piece, making the forging much stronger.