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Alloy 20

Density: 8.1 g/cm³
Equivalent designations: Alloy 20, UNS N08020, Carpenter 20, 20Cb-3, Incoloy Alloy 20, Incoloy 020, DIN W.NR 2.4660, NS143, Inconel alloy20, NAS 335X, W.Nr.2.4460, Nicrofer 3620 Nb-alloy20, ATI 20;

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Product introduction
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. It also contains niobium for stabilization against sensitization and resultant intergranular corrosion. Carpenter 20 combines excellent corrosion resistance with elevated mechanical properties and relatively easy fabrication. Although originally designed for use in sulfuric acid related industries, Alloy 20 is now a popular choice for a wide variety of industries including the chemical, food, pharmaceutical, and plastics industries. In addition, this superalloy is used in heat exchangers, mixing tanks, metal cleaning and pickling equipment, and piping.

There has long been a debate on whether Carpenter 20 is a stainless steel or a nickel alloy because the nickel content is right on the border of defining it as one way or the other. So, depending on who you talk to this alloy may be referred to as alloy 20 Stainless Steel or as a nickel alloy. Either way it is still great for corrosion resistance.


Available products for Alloy 20:
Welded pipe/tube
Seamless pipe/tube
Pipe fittings
Flanges
Bar/Profiles
Sheet/ Plate/Coil/Strip
Wire/Wire rope
Forgings
Welding Rod
Fastener
Chemical composition:

Grade Chemical Component %
C Si Mn S P Cr Ni Mo Fe Cu Nb
Alloy20 Max 0.07 Max 1.0 Max 2.0 Max 0.035 Max 0.045 19.0-21.0 32.0-38.0 2.0-3.0 Balance 3.0-4.0 8C-1.0


Application:
1. Chemical and petroleum processing equipment
2. Extraction columns in the production of amines and the processing of pharmaceuticals
3. Heat exchangers and Process piping
4. Equipment for food processing to protect against contamination
5. Mixing tanks
6. Production of plastics and synthetic fibers
7. SO2 scrubbers and other severe environments
8. Extraction columns in the production of amines and the processing of pharmaceuticals
9. Valves


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