UNS N08020 (Alloy 20)

Short Introduction:

  • Alloy 20(UNS N08020) /Incoloy20/2.4660/nicr20cumo/Nicrofer3620NB/F20/CN7M/Carpenter 20 CB 3TM/NAS 335X/NS143/NS 1403/0Cr20Ni28Mo3Cu3Nb/20Cb-3 is a low-carbon, niobium-stabilized austenitic nickel/iron/chromium alloy with additions of molybdenum and copper. It exhibits exceptional corrosion resistance in chemical environments containing phosphoric acid, nitric acid, chlorides and sulfuric acid. It also has good mechanical properties at both ambient and elevated temperatures.

    Category:

    Description

    UNS N08020 (Alloy 20)

    Material grades and equivalents: Alloy 20(UNS N08020) /Incoloy20/2.4660/nicr20cumo/Nicrofer3620NB/F20/CN7M/Carpenter 20 CB 3TM/NAS 335X/NS143/NS 1403/0Cr20Ni28Mo3Cu3Nb/20Cb-3

    Special properties:

    Alloy 20(UNS N08020) /Incoloy20/2.4660/nicr20cumo/Nicrofer3620NB is an iron-based austenitic alloy developed to resist sulfuric acid corrosion. It has excellent resistance to sulfuric acid corrosion, phosphoric acid, nitric acid and chloride environments, chloride stress corrosion, pitting corrosion and crevice corrosion. Thus, Alloy 20 is also known as a corrosion-resistant alloy; it has a wide range of applications: chemical, food, pharmaceutical, power production and plastic industries. To resist pitting and chloride corrosion, stress corrosion cracking problems, etc., it is often necessary to use alloy 20.

     Alloy 20 Chemical composition:

    C

    Si

    Mn

    P

    S

    Cr

    Ni

    Mo

    Cu

    Fe

    Nb

    Min

    19

    32

    2

    3

    Rest

    Max

    0.07

    1

    2

    0.045

    0.035

    21

    38

    3

    4

    Rest

    1

    Alloy 20 Mechanical Properties:

    Density, g/cm³

    8.08

    Melting range, °C

    1357 – 1430

     Alloy 20 Physical properties:

    Material

    Tensile Strength MPa

    Yield Strength (0.2% Offset) MPa

    Elongation (%)

    Alloy 20

    620

    300

    41

    Alloy 20 ASTM Specifications:

    Pipe Smls

    Pipe Welded

    Tube Smls

    Tube Welded

    Sheet/Plate

    Bar

    Forging

    Fitting

    B729
    B464
    B729
    B468
    B463
    B473
    B462

    B366

    Alloy 20 (UNS N08020) /Incoloy20/2.4660/nicr20cumo/Nicrofer3620NB exhibits excellent corrosion resistance in chemical environments that contain sulphuric acid, chlorides, phosphoric acid and nitric acid. It is easy to fabricate this alloy to form mixing tanks, heat exchangers, pickling equipment etc. The standard forms in which this alloy is available are round, flats, pipe, tube, strip and wire.

    Alloy 20 Applications

    Alloy 020 is used in the following applications:

    • Produce mixing tanks, heat exchangers, valves, fittings and fasteners

    • Production of gasoline, solvents, explosives and organic chemicals

    • Pharmaceuticals and food industry.

    • Production of plastics and synthetic fibers

    • Chemical and petroleum processing equipment

    • Mixing tanks

    • Heat exchangers

    • Process piping