Hastelloy C-276 (UNS N10276) is a premium nickel‑molybdenum‑chromium‑tungsten alloy with exceptional corrosion resistance in harsh environments. It resists oxidation, reduction, pitting, crevice corrosion, and stress corrosion cracking. With low carbon content, it preserves corrosion resistance after welding. It offers good mechanical properties, formability, and weldability, performing reliably in strong acids, chlorides, seawater, and high‑temperature corrosive media. It is one of the most versatile and widely used corrosion‑resistant alloys.