High density alloy for improved mass properties of an article

An iron golf club head comprising:

• a periphery member having a sole wall, a toe wall extending upward from the sole wall at a first end of the sole wall, a hosel extending upward from the sole wall at a second end of the sole wall, and a heel wall extending upward from the sole wall, the periphery member composed of a nickel-tungsten-chromium alloy having a density ranging from 9.0 g/cm3 to 10.5 g/cm3, and a Rockwell Hardness ranging from 50 to 92;
• a central member coupled to the periphery member, the central member being composed of a non-metal material and having a body portion with a forward surface, a rear surface, a sole surface, a top surface, a toe surface, and a heel surface, the central member having a cavity formed in the rear surface of the body portion;
• and
• a face plate composed of a metal material having a lower density than the nickel-tungsten-chromium alloy, the face plate being coupled to the periphery member and disposed over the forward surface of the central member.