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Alloy 20

Alloy 20 is a austenitic nickel-iron-chromium alloy developed for maximum resistance against acid attack, specially sulfuric acid. It offers excellent resistance to pitting, crevice corrosion and general corrosion in chemicals containing chlorides and sulfuric, nitric , phosphoric and acids.For stabilization against sensitization and resultant intergranular corrosion Alloy 20 contains niobium .With relatively easy fabrication and elevated mechanical properties Alloy 20 also provides excellent corrosion resistance .


Standard Alloy 20
UNS N08020
Werkstoff Nr. 2.4660

Mechanical & Physical Properties

Density 8.1 g/cm3
Melting Point 1443 °C (2430 °F)
Tensile Strength Psi-80000 ,MPa-551
Yield Strength (0.2%Offset) Psi-35000 ,MPa-241
Elongation 30 %

Chemical Composition

  Alloy 20
Ni 32-38
Fe Bal
Cr 19-21
Cu 3-4
Mo 2-3
Nb 0.1-0.3
C 0.02 max
Mn 1-2
P 0.02 max
S 0.005 max
Si 0.7 max


Petrochemical Industry
Chemical Industry
Fabrication Industry
Food Industry
Heat Exchangers
Pharmaceutical Industry

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