Abstract: Disclosed is an austenitic stainless steel alloy that includes or consists of, by weight, about 22.0% to about 23.0% chromium, about 4.0% to about 5.0% nickel, about 4.0% to about 5.0% manganese, about 0.2% to about 0.4% molybdenum, about 0.2% to about 0.4% niobium, about 0.5% to about 1.5% silicon, about 0.35% to about 0.45% carbon, about 0.2% to about 0.28% nitrogen, a balance of iron, and other inevitable/unavoidable impurities that are present in trace amounts. The elements phosphorus and sulfur are excluded from the alloy beyond impurity levels. Turbocharger turbine housings made of the stainless steel alloy, and methods of making the same, are also disclosed. The stainless steel alloy is suitable for use in turbocharger turbine applications for temperatures up to about 1,000° C.

Abstract: Disclosed is an austenitic stainless steel alloy that includes or consists of, by weight, about 24.0% to about 26.0% chromium, about 11.0% to about 13.0% nickel, about 1.0% to about 2.5% manganese, about 1.2% to about 1.6% niobium, about 1.0% to about 1.7% silicon, about 0.4% to about 0.5% carbon, about 0.2% to about 0.3% nitrogen, a balance of iron, and other inevitable/unavoidable impurities that are present in trace amounts. The elements zirconium and sulfur are excluded from the alloy beyond impurity levels. Turbocharger turbine housings made of the stainless steel alloy, and methods of making the same, are also disclosed. The stainless steel alloy is suitable for use in turbocharger turbine applications for temperatures up to and beyond about 1,050° C., such as up to about 1070° C.

Abstract: Disclosed is an austenitic stainless steel alloy that includes or consists of, by weight, about 23.0% to about 25.0% chromium, about 8.5% to about 10.0% nickel, about 0.5% to about 2.0% manganese, about 0.8% to about 1.0% niobium, about 0.5% to about 1.5% silicon, about 0.35% to about 0.45% carbon, about 0.2% to about 0.28% nitrogen, a balance of iron, and other inevitable/unavoidable impurities that are present in trace amounts. The elements zirconium and sulfur are excluded from the alloy beyond impurity levels. Turbocharger turbine housings made of the stainless steel alloy, and methods of making the same, are also disclosed. The stainless steel alloy is suitable for use in turbocharger turbine applications for temperatures up to about 1,020° C.

Abstract: An austenitic stainless steel alloy includes, by weight, about 23.0% to about 25.0% chromium, about 8.5% to about 10.0% nickel, about 4.0% to about 5.0% manganese, about 0.8 to about 0.9% niobium, about 0.5% to about 1.5% silicon, about 0.35% to about 0.45% 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. In one example, a turbocharger turbine housing is made of the stainless steel alloy.

Abstract: Turbocharger turbine wheels including nickel-based alloys are disclosed herein. In one exemplary embodiment, a turbocharger turbine wheel includes as, at least part of its constituency, a nickel-based alloy that includes, on a weight basis of the overall alloy: a nickel-based alloy includes or consists of, on a weight basis of the overall alloy: about 2.00% to about 3.00% cobalt, about 12.0% to about 14.0% chromium, about 5.75% to about 6.85% aluminum, about 5.00% to about 6.00% tungsten, about 2.25% to about 2.75% molybdenum, about 1.25% to about 2.00% titanium, about 0.55% to about 1.50% niobium, about 0.13% to about 0.17% carbon, about 0.03 to about 0.05% zirconium, about 0.01% to about 0.02 boron, and a majority of nickel, with the understanding that there may be inevitable/unavoidable impurities. The turbocharger turbine wheel may be configured for operating at about 980° C. to about 1020° C.