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 16% to about 21% chromium;
• about 4.5% to about 5.5% nickel;
• about 2% to about 5% manganese;
• about 1% to about 2% silicon;
• about 0.8% to about 1.2% tungsten;
• about 0.4% to about 0.8% molybdenum;
• about 0.4% to about 0.6% niobium;
• about 0.4% to about 0.5% carbon;
• 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 16% to about 21% chromium;
• about 4.5% to about 5.5% nickel;
• about 2% to about 5% manganese;
• about 1% to about 2% silicon;
• about 0.8% to about 1.2% tungsten;
• about 0.4% to about 0.8% molybdenum;
• about 0.4% to about 0.6% niobium;
• about 0.4% to about 0.5% carbon;
• and
• a balance of iron.