©2024 by United Industries, Inc. Stainless Steel Alloys Chemical Composition. United Industries offers a wide variety of stainless and corrosion resistant alloys for superior strength, bendability, temperature requirements and longevity. Austenitic. ELEMENTS T201 T301 T304L T309S T316L T321 (C) Carbon, max: 0.15: 0.15: 0.035: 0.08: 0.035: