AUSTENITIC STAINLESS STEEL ALLOYS AND TURBOCHARGER COMPONENTS FORMED FROM THE STAINLESS STEEL ALLOYS

摘要

Disclosed is an austenitic stainless steel alloy that includes or consists of, by weight, about 24.0% to about 26.0% chromium, about 13.0% to about 20.0% nickel, about 4.5% to about 5.5% manganese, about 1.2 to about 1.5% niobium, about 1.0% to about 2.0% silicon, about 0.4% to about 0.5% carbon, about 0.2% to about 0.3% nitrogen, and a balance of iron with inevitable / unavoidable impurities. The elements tungsten and molybdenum are excluded beyond impurity levels. Turbocharger turbine housings made of the stainless steel alloy are also disclosed. The stainless steel alloy is suitable for use in turbocharger turbine applications for temperatures beyond about 1050 °C, such as up to about 1070 °C.