US Patent 7749102 Iron-type golf club head

An iron-type golf club head comprises: a main unit made of a carbon steel having a carbon content Ch (wt %) and integrally including a hosel attached to a club shaft; and a face plate made of a carbon steel having a carbon content Cf (wt %) and attached to the main unit so that the front surface of the face plate forms at least a major part of a face of the head, wherein the carbon content Cf (wt %) of the face plate is less than the carbon content Ch (wt %) of the main unit.