STEEL EXCELLENT IN HIGH TEMPERATURE CORROSION RESISTANCE IN THE PRESENCE OF CHLORIDE

摘要

PURPOSE:To provide a steel with excellent corrosion resistance even in a high temp. environment where chlorides are present by specifying the content of C, Si, Mn, Cr, Ni, Mo, etc., in a steel. CONSTITUTION:The compsn. of an austenitic steel is formed of, by weight, =0.05% C, =2% Si, =2% Mn, 15 to 30% Cr, 30 to 60% Ni, 0.5 to 4% Mo and the balance Fe with inevitable impurities. If required, 0.001 to 0.05% of one or more kinds of Mg and B and one or more kinds among =0.5% Ti, =0.5% Al, =1% Zr, =0.5% Nb and =0.15% N are furthermore incorporated therein. This steel shows excellent corrosion resistance in a high temp. dry (wet) corrosive environment where chlorides are present and excellent in high temp. strength, long time stability, weldability, bendability, etc. Thus, the steel is suitable for a sheath heater for electric apparatus for cooking or the like.