Coal ships and coal and ore combination carriers corrosion-resistant steel for the hold

摘要

PROBLEM TO BE SOLVED: To provide a corrosion resistant steel for a coal ship and a ship hold for coal and ore, which exhibits excellent corrosion resistance in a corrosive environment unique to the ship hold for coal and ore, in which dry and wet are repeated, and in a low pH environment.SOLUTION: The corrosion resistant steel of the invention comprises by mass%: 0.01-0.25% of C; 0.01-0.50% of Si; 0.1-2.0% of Mn; 0.026-0.035% of P; 0.035% or less of S; 0.003-0.10% of Al; 0.0010-0.0080% of N; 0.05-0.35% of Cu; 0.02-0.40% of Ni; 0.01-0.2% of Sb; 0.005-0.5% of W; 0.003-0.025% of Nb; and 0.1% or less of Cr, and remainder is formed of Fe and inevitable impurities.SELECTED DRAWING: None