Alloy 20 Fasteners with World Wide
Alloy 20 is a nickel-chromium-molybdenum stainless steel alloy
designed for applications with sulfuric acid. Its corrosion
resistance also gives it many other uses within the chemical, food,
pharmaceutical, and plastics industries. A main reason why Alloy 20
fasteners are so common is because they resists pitting and chloride
ion corrosion and its copper content protects it from sulfuric acid.
It is also known as Carpenter 20. Cast versions are designated CN7M.
Alloy 20 hex bolts, nuts washers, and stud bolts can be fabricated
to meet your projects exact requirements. Lightning Bolt specializes
in hard to find alloy fasteners, including alloy20.
Alloy 20 is one of the "Super" stainless steels that was engineered
for superior resistance to acid attack. It's nickel, chromium,
molybdenum and copper content contribute to its overall resistance
to chlorideon stress corrosion cracking and general pitting attack.
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
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
cracking. In general this makes alloy 20 an excellent alloy of
fastener to use in the
chemical industry, Food and dye production
SO 2 scrubbers and other severe environments.
Alloy 20 tensile Strength (KSI) 80
Other Names for alloy 20 include UNS N08020, DIN
2.4660,CN7M,Carpenter 20 CB 3TM,AL 20TM,Carlson Alloy
C20TM,Nickelvac 23TM, Nicrofer 3620 NbTM.
Carbon, 0.06% maximum
Manganese, 2% maximum
Silicon, 1% maximum
Columbium, 1% maximum
Iron, 31-44% (balance)
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place an order, please call (225) 272-6200 or send an email to
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