PISTON RING MATERIAL FOR INTERNAL COMBUSTION ENGINE

摘要

A piston ring material that when formed into a piston ring product, maintains excellent properties, and that at the production of piston ring rod, realizes excellent processability and shape stability. There is provided a piston ring material for internal combustion engine comprising, by mass, 0.5 to less than 0.7% C, 1.0% or less Si, 1.0% or less Mn, 12.0 to 16.0% Cr, 3.0% or less Mo and/or W (Mo+1/2W), 0.02 to 0.14% N and the balance Fe and unavoidable impurities, wherein the relationship of contained C, N and Cr satisfies the formulae: 25 = 43.22C(%)+42.45N(%)-0.02Cr(%) = 40, and 0.15 = 0.92C(%)+0.67N(%)-0.03Cr(%) = 0.30.