0301 Steel for making pipe molds

Abstract

A low alloy steel, designated 0301 (Khare IV) steel, that may be used for making pipe molds with high hardenability, high ductility and high toughness are described, the steel consisting essentially of from about 0.16% to about 0.22% carbon, about 0.60% to about 0.90% manganese, about 0.50% to about 0.65% silicon, about 0.015% maximum phosphorus, about 0.015% maximum sulfur, about 2.25% to about 2.55% chromium, about 0.40% to about 0.50% molybdenum, about 0.55% to about 0.65% nickel, about 0.03% to about 0.08% vanadium, and balance essentially iron.

Dependencies are inferred from the claim text.