Alloy 20 is one of the “Super” stainless steels, which were designed for maximum acid resistance. Its overall resistance to the cracking and general pitting assault of chloride on stress corrosion is due to its nickel, chromium, molybdenum, and copper composition. Columbium stabilizes the alloy, preventing carbide precipitation during welding.
It has high mechanical properties and is quite simple to make. While the alloy was created for use in sulfuric acid related industries, it is most typically employed in the chemical processing industry. Pharmaceuticals, meats, oil, solvents, plastics, explosives, synthetic textiles, and a wide range of other materials are utilized in the manufacturing process.
This excellent alloy is also required in high-temperature exchangers, combining tanks, metal cleaning, as well as pickling tools and pipelines. When compared to higher nickel-based alloys, making standard stainless steels with Alloy 20 Pipe can result in cost savings.
Uses of Alloy 20 Pipes
Alloy 20 Pipes are commonly used in chemical and allied industries, heat exchangers, food and dye manufacturing, SO 2 scrubbers and other harsh environments, pickling racks, tanks, and valves, to name a few. Food processing, construction, chemical industry, petrochemicals, pharmaceuticals, oil exploration, power generation, pulp and paper industry, condensers, heat exchangers, and other industries use Alloy 20 pipes.
Chemical manufacturing, petrochemical and refining, marine, pharmaceutical, and food processing are among industries that use Alloy 20 pipes. End-use applications include storage tanks, mixing tanks, agitators, pump and valve modules, food processing equipment, fasteners, and fittings. According to ASME, applications are limited to a maximum temperature of 1000 degrees F. It’s also crucial to determine whether the desired corrosion resistance can be attained in a particular environment.
Features of Alloy 20 Pipes
They are more resistant to stress-corrosion cracking in boiling sulfuric acid containing 20 to 40% sulfur.
Sulfuric acid corrosion resistance and chloride stress corrosion cracking resistance is also excellent in Alloy 20 pipes.
They also have excellent mechanical characteristics, fabricability, and welding carbide precipitation.
