STEEL PRODUCT WITH HIGHER RESISTANCE TO ATMOSPHERIC CORROSION IN SALT ENVIRONMENT AND USE OF A STEEL PRODUCT

摘要

The present invention is related to a steel product of the weathering steel type, i.e. a product exhibiting increased corrosion resistance after having been exposed to the outside environment for a given time. According to the invention, the steel product is defined by a composition consisting of (in wt %):Carbon between 0.03 and 0.2,Manganese between 0.5 and 2,Copper between 0 and 0.5,Ti between 0 and 0.1,Cr between 0 and 0.5,Nickel between 0 and 0.2,Niobium between 0 and 0.1,Nitrogen between 0 and 0.01,Sulphur between 0 and 0.01, Phosphor between 0 and 0.01,Aluminium higher than 0 and maximum 1.5,Silicon between 0.25 and 1.5, the balance being Fe and accidental impurities, and wherein the sum of the Al and Si levels is higher than about 0.85 wt %.