Patent ID: 8287403
Filing Date: 2012-10-16
Classification: A63B,C22C

Abstract:
1. An iron-based alloy for a golf club head, comprising: chromium in an amount ranging from 16.3 to 17.2 wt %; nickel in an amount ranging from 5.8 to 6.5 wt %; nitrogen in an amount ranging from 0.10 to 0.20 wt %; carbon in an amount ranging from 0.01 to 0.12 wt %; silicon in an amount ranging from 0.3 to 1.2 wt %; manganese in an amount ranging from 0.3 to 1.2 wt %; copper in an amount ranging from 2.8 to 3.2 wt %; titanium, niobium, and vanadium in an amount ranging from 0.15 to 0.5 wt %; and a balance of iron and impurities, based on a total weight of said iron-based alloy; and wherein: said alloy has a duplex-phase microstructure including a martensite phase and 10˜30% austenite phase, and possesses a tensile strength greater than 120 Ksi and an elongation greater than 35%.