HIGH STRENGTH PRECIPITATION-HARDENED STAINLESS STEEL ALLOY SUITABLE FOR CASTING IN AIR, CAST STAINLESS STEEL PRODUCT AND CAST GOLF CLUB HEAD

摘要

PROBLEM TO BE SOLVED: To provide a precipitation-hardened stainless steel alloy provided with high strength and easily castable in the air and to obtain a cast product made thereof. SOLUTION: This stainless steel alloy has a composition almost substantially composed of, by weight, =0.040% C, =1.00% Mn, =1.00% Si, =0.050% P, =0.015% S, 12.00 to 15.50% Cr, 5.75 to 7.25% Ni, 0.50 to 1.50% Mo, 1.00 to 4.00% Cu, 1.00 to 2.00% Cb, =2.00% Cb+Ta and =0.040% N, and the balance substantially iron with ordinary impurities. The alloy combines strength, toughness and corrosion resistance and thereby suitable for producing a cast golf club head.