Alloy 20 Pipe, Tubing, Fittings & Flanges

Alloy 20, commonly known as Carpenter 20 or UNS N08020, is a nickel-iron-chromium austenitic alloy designed for harsh corrosive environments. This article focuses on the performance characteristics, main applications, and value of pipes, fittings, and flanges made from Alloy 20 in industrial systems.

The most notable characteristic of Alloy 20 is its excellent resistance to sulfuric acid, especially over medium concentrations and temperature ranges. The addition of copper and molybdenum significantly enhances its corrosion resistance in reducing acid environments. In addition to its resistance to sulfuric acid, it also exhibits good resistance to pitting, crevice corrosion, and stress corrosion cracking in environments containing phosphoric acid, nitric acid, and various chlorides. This comprehensive corrosion resistance makes it ideal for handling corrosive chemicals.

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