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N08020, also known as Alloy 20 or Carpenter 20, is an austenitic nickel‑iron‑chromium super stainless steel specifically engineered for exceptional corrosion resistance in sulfuric acid and other aggressive chemical environments.
It combines excellent resistance to general corrosion, pitting, crevice corrosion, and stress corrosion cracking (SCC), especially in sulfuric acid solutions of various concentrations. The addition of copper and molybdenum further enhances its performance in reducing and chloride‑containing media.
Alloy 20 also offers good mechanical properties, excellent weldability, and high structural stability. It minimizes carbide precipitation during welding, reducing intergranular corrosion risk.
This alloy is widely used in chemical processing equipment, pickling tanks, heat exchangers, piping systems, valves, pumps, and fasteners exposed to corrosive industrial environments.
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