Patent ID: 8348785

Claim:
A golf club head comprising: a striking plate made of a high-strength aluminum alloy, the striking plate having a striking face for impacting a golf ball; and a main body constituting the remainder of the golf club head, wherein the main body is made of carbon steel, stainless steel, alloy steel, Fe—Mn—Al alloy, nickel based alloys, cast iron, super alloy steel, pure titanium, titanium alloy, magnesium alloy, copper alloy or aluminum alloy different from that forming the striking plate, wherein the high-strength aluminum alloy comprises at most 0.06 wt % of Si, at most 0.1 wt % of Fe, 2 to 2.5 wt % excluding 2 wt % of Cu, 1.5 to 2.5 wt % of Mg, 5 to 9.5 wt % of Zn, at most 0.05 wt % of Mn, 0.1 to 0.2 wt % of Zr, at most 0.05 wt % of Cr, at most 0.05 wt % of Ti, 0.01 to 0.1 wt % of So, and balance Al, wherein the weight ratio of Zn over Mg is from about 3.2 to about 4.4; wherein the surface of the striking plate has a hard anodizing film and the thickness of the hard anodizing film is in a range from 5 μm to 30 μm.