Alloy 20

Alloy20 (UNS N08020)

Alloy 20, also known as Carpenter 20, is a nickel-iron-chromium austenitic alloy that was developed for maximum resistance to acid attack, specifically sulphuric acid. It has excellent corrosion resistance to sulphuric, phosphoric and organic acids and to aqueous solutions of their salts. Resistance to nitric acid is also good. Due to the controlled chemical composition, the alloy also has excellent resistance to such forms of corrosion as intergranular corrosion and stress corrosion. The molybdenum content ensures good resistance to pitting and crevice corrosion
Carpenter 20 combines excellent corrosion resistance with elevated mechanical properties
Typical applications of this nickel alloyincluding 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.
Nano-Mag Technologies offer various products made from Alloy 20 material including High Pressure Autoclave, Reactor, Hydrogenators, Magnetic Drives, Catalyst Filters etc. as per the requirement.
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Characteristics of Alloy 20

  • Excellent resistance to sulphuric and phosphoric acids
  • Good resistance to intergranular corrosion
  • Very good resistance to chloride-ion induced stress-corrosion cracking
  • Good resistance to pitting and crevice corrosion
  • Good mechanical properties at both ambient and elevated temperatures, up to approximately 500 °C (930 °F)

Chemical Composition:

Nickel:32 - 38
Chromium19 - 21
Silicon1.0 max.
Carbon0.07 max
Manganese2 % max
Niobium1 max.

Indicative Corrosion Data

Alkaline & SaltsGood
Hydrochloric AcidGood
Hydrofluric AcidGood
Nitric AcidGood
Organic AcidGood
Phosphoric AcidGood
Sulfuric AcidGood

Corrosion rates may vary at different concentrations and temperatures . Each user is advised to carry out their own corrosion test with sample coupon

Material Specification

Plate, Sheet & StripSB-463B-46317750
Rod & BarSB-472B-47217752
Seamless Pipe & TubeSB-729B-72917551
Welded PipeSB-464B-464-
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Alloy 20 High Pressure Autoclave50 ml-100 litres, Upto 350 bar, 500°C
Alloy 20 High Pressure Reactors
Alloy 20 Hydrogenators
50 ml -50000 litres, Upto 150 bar, 500°C
Alloy 20 Continuous Stirred Tank Reactor50 ml-100 litres, Upto 350 bar, 500°C
Alloy 20 Non-Stirred Pressure Vessels50 ml-100 litres, Upto 350 bar, 500°C
Alloy 20 Catalyst Filters for Precious MetalsAs per requirement
Alloy 20 Magnetic DriveAs per requirement
Alloy 20 Mini Magnetic CouplingNano-20, Nano-40, Nano-80

All Products, Product Specifications and Data are subject to change.

  • Synthetic rubber manufacturing equipment
  • Processing of pharmaceuticals, plastics and organic and heavy chemicals
  • Tanks, piping, heat exchangers, pumps, valves, and other process equipment
  • Acid cleaning and pickling equipment
  • Chemical process piping, reactor vessels
  • Bubble caps
  • Petrochemical process equipment
  • Food and dye production