Stainless steel alloys, turbocharger turbine housings formed from the stainless steel alloys, and methods for manufacturing the same

An turbocharger turbine housing comprising:

• an austenitic stainless steel alloy, wherein the austenitic stainless steel alloy comprises, by weight:
• about 22% to about 28% chromium;
• about 3.5% to about 6.5% nickel;
• about 1% to about 6% manganese;
• about 0.5% to about 2.5% silicon;
• about 0.5% to about 1.5% tungsten;
• about 0.2% to about 0.8% molybdenum;
• about 0.2% to about 0.8% niobium;
• about 0.3% to about 0.6% carbon;
• about 0.2% to about 0.8% nitrogen;
• and
• a balance of iron.

A method of fabricating a turbocharger turbine housing, the method comprising the step of:

• forming the turbocharger turbine housing from an austenitic stainless steel alloy, wherein the austenitic stainless steel alloy comprises, by weight:
• about 22% to about 28% chromium;
• about 3.5% to about 6.5% nickel;
• about 1% to about 6% manganese;
• about 0.5% to about 2.5% silicon;
• about 0.5% to about 1.5% tungsten;
• about 0.2% to about 0.8% molybdenum;
• about 0.2% to about 0.8% niobium;
• about 0.3% to about 0.6% carbon;
• about 0.2% to about 0.8% nitrogen;
• and
• a balance of iron.