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Alloy 20 (Carpenter 20)
Alloy 20, also known as Carpenter 20, is a nickel-iron-chromium austenitic alloy that was developed for maximum resistance to acid attack, specifically sulfuric acid. This superalloy has excellent resistance to general corrosion, pitting, and crevice corrosion in chemicals containing chlorides and sulfuric, phosphoric, and nitric acids.
Torqbolt can provide a wide variety of Carpenter 20 fasteners including; carpenter 20 nuts, carpenter 20 bolts, sockets, washers and more in Alloy 20 (Carpenter 20) fasteners. If we do not have your Carpenter 20 fasteners in stock (Inch or Metric) we can have these manufactured to your specification.Alloy 20 is a nickel-chromium-molybdenum stainless steel alloy developed for applications involving sulfuric acid. Its corrosion resistance also finds other uses in the chemical, food, pharmaceutical, and plastics industries. Alloy 20 resists pitting and chloride ion corrosion and its copper content protects it from sulfuric acid. Alloy 20 is not a SS but a nickel alloy (ASTM).
It is also known as Carpenter 20. Cast versions are designated CN7M.
|Other names||UNS N08020. DIN 2.4660, CN7M, Carpenter 20 CB 3™ AL 20™ Carlson Alloy C20™Nickelvac 23™ Nicrofer 3620 Nb™|
|Specifications||ASTM B729, B464, B366, B473, B462ASME SB729, SB464, SB366, SB473, SB462ANSI / ASTM A555-79|
|Composition by %||Carbon||0.07 max|
|Chromium||19 – 21|
|Copper||3 – 4|
|Molybdenum||2 – 3|
|Nickel||32 – 38|
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