Ni EGR A low-nickel austenitic Casting Steel with Superior Tensile Strength and Resistance to Oxidation on High Temperature and EGR cooler system using the same

摘要

A Ni-austenitic high-temperature cast steel and an EGR cooler device using the same are introduced. The Ni reduced austenitic high temperature resistant cast steel according to the present invention is characterized in that it contains C: 0.03-0.07, Si: 0.7-0.9, Mn: 0.7-0.9, Cr: 20-22, Ni: 3.8-4.2, Mo: 0.4 To 0.6, Cu: 0.2 to 0.4, N: 0.18 to 0.22, and the balance includes Fe and other unavoidable impurities.