Stainless Steel is one of the most used materials in golf. Generally the material is not expensive and it is easy to cast it into all of the shapes in which you see golf clubs made. In addition it is durable enough for everyday play.
There are two main types of stainless steel that are used in golf club heads. One is 17-4 stainless steel (this has no more than 0.07% carbon, between 15 and 17% chromium, 4% nickel, 2.75% copper, and 75% iron and trace elements). 17-4 is used mostly for irons and putters.