All About Alloy 20 Fasteners

Alloy 20 is a nickel-chromium-molybdenum stainless steel alloy made for applications involving sulfuric acid. It is often referred to as “carpenter 20” and “20CB-3.” Numerous more applications in the chemical, food, pharmaceutical, and plastics sectors are also made possible by its resistance to corrosion. Because Alloy 20 Fasteners resist pitting and chloride ion corrosion and are shielded from sulfuric acid by their copper component, they are quite popular. Cast variations are referred to as CN7M. It is possible to produce alloy 20 hex bolts, nuts, washers, and stud bolts to precisely match the specifications of your project.

Alloy-20 is one of the super Stainless steel that was engineered for superior resistance to acid attack. Its nickel, chromium, molybdenum, and copper content contribute to its overall resistance to chloride stress corrosion cracking and general pitting attack. It is practically immune to chloride stress corrosion cracking. Alloy-20 is stabilized with columbium to minimize carbide precipitation during welding. It has great mechanical properties and can be fabricated with relative ease. Though the alloy was designed for use in sulfuric acid-related industries, it finds wide usage throughout the chemical industry throughout the world. It also is used for processing pharmaceuticals, food, gasoline, solvents, plastics, explosives, synthetic fibers, and many other products.

It has been known to have superior resistance to stress-corrosion cracking in boiling 20 to 40% sulfuric acid. Also, it has excellent general corrosion resistance to sulfuric acid. In addition, it has excellent resistance to chloride stress corrosion cracking. In general, this makes alloy 20 an excellent alloy of fastener to use in the chemical industry, Food and dye production industry, SO 2 scrubbers, and other severe environments.