Alloy 20 (UNS N08020 / WNR 2.4660), also known as Carpenter 20, is a nickel-iron-chromium-based austenitic alloy specially designed to resist sulfuric acid and aggressive chemical environments. With additions of molybdenum and copper, it offers outstanding resistance to pitting, crevice corrosion, and chloride stress-corrosion cracking. Alloy 20 is often considered an excellent alternative to conventional stainless steels in industries requiring superior corrosion resistance. Widely used in chemical, petrochemical, pharmaceutical, food, and marine applications, Alloy 20 is available in Pipes, Tubes, Sheets, Plates, Flanges, and Fittings. Its combination of durability, fabricability, and cost-effectiveness makes it a preferred choice for critical process equipment.