Incoloy (alloy 20) nickel-based alloy

    Incoloy 20
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    Material grade: Incoloy (alloy 20) nickel-based alloy

    US grade: UNS N08020

    Chinese brand: NS143, 0Cr20Ni35Mo3Cu4Nb

    1. Overview of Incoloy 20 (N08020, Alloy 20) nickel-based alloy:

    The Cr content in Incoloy 20 (N08020, Alloy 20) nickel-based alloy is usually 19.0-21.0%, and the nickel content is 32.0-38.0%.
    Incoloy 20 alloy is a nickel-based alloy containing molybdenum and copper, which has good hot and cold working properties. Incoloy 20 is a corrosion-resistant alloy with many excellent properties. It has good resistance to oxidizing and moderate reductive corrosion. It has excellent resistance to stress corrosion cracking and good local corrosion resistance. It is satisfactory in many chemical process media. corrosion resistance properties.

    2. Chemical composition of Incoloy 20 (N08020, Alloy 20) nickel-based alloy: %

    C≤

    Si≤

    Mn≤

    P≤

    S≤

    Cr≥

    Ni≥

    Mo≥

    Cu≤

    0.007

    1.00

    2.00

    0.045

    0.035

    19.0-21.0

    32.0-38.0

    2.0-3.0

    3.0-4.0

    other

    N≤

    Al≤

    Ti≤

    Fe≤

    Co≤

    V≤

    W≤

    Nb+Ta

    -

    -

    -

    Remain

    -

    -

    -

    ≤1.00

    3. Incoloy 20 (N08020, Alloy 20) nickel-based alloy implementation standards:

    product

    ASTM

    Rod

    B446

    Plate, sheet and strip

    B443, B906

    Seamless pipes and fittings

    B444, B829

    welded pipe

    B705, B775

    Welded pipe fittings

    B704, B751

    Welded connections

    B 366

    Forged billets and bars

    B 472

    Forgings

    B 564

    4. Physical properties of Incoloy 20 (N08020, Alloy 20) nickel-based alloy:

    1. Density: ρ=8.08g/cm3.

    2. Melting temperature range: 1357-1430℃.

    5. Mechanical properties of Incoloy 20 (N08020, Alloy 20) nickel-based alloy:

    1. Incoloy 20 (N08020, Alloy 20) alloy tensile strength (MPA) Rm N/mm2≥620.

    2. Incoloy 20 (N08020, Alloy 20) alloy tensile strength (MPA) Rm N/mm2≥621.

    3. Incoloy 20 (N08020, Alloy 20) alloy elongation A5% ≥ 40.

    6. Incoloy 20 (N08020, Alloy 20) nickel-based alloy phase structure:

    Incoloy 20 (NO8020, Aloy 20) nickel-based alloy was treated at 1120°C for 2 hours. There were only TiN amide and Cr7C3 carbide. After long-term aging at 870°C and 1500°C, the structure still contained Cr7C3 and TiN, indicating the structure of the alloy. is stable.

    7. Incoloy 20 (N08020, Alloy 20) nickel-based alloy process performance and requirements:

    1. Incoloy 20 (N08020, Alloy 20) nickel-based alloy has good hot working properties, and the forging heating temperature of steel ingot is 1110℃~1140℃. The average grain size of the alloy is closely related to the deformation degree and final forging temperature of the forging.
    2. Incoloy 20 (N08020, Alloy 20) nickel-based alloy has good welding performance and can be connected by various methods such as original arc welding, xenon arc welding, resistance welding and brazing. Large or complex welded structural parts can be connected after melt welding. It should be annealed at 870°C for 1 hour to eliminate welding stress.
    3. Incoloy 20 (N08020, Alloy 20) nickel-based alloy must be machined after heat treatment. Due to the work hardening of the material, it should be processed at a lower cutting speed and heavy feed than when processing low-alloy standard austenitic stainless steel. Only then can it be driven into the surface that has been hardened by cold work.

    8. Incoloy 20 (N08020, Alloy 20) nickel-based alloy varieties, specifications and supply status:

    Shanghai Disheng Special Alloy can produce various specifications of Incoloy 20 seamless pipes, Incoloy 20 steel plates, Incoloy 20 round bars, Incoloy 20 forgings, Incoloy 20 flanges, Incoloy 20 rings, Incoloy 20 welded pipes, Incoloy 20 steel strips, Incoloy 20 wire and supporting welding materials.

    Variety classification

    delivery status

    Seamless tube

    Solid solution + acid white, length can be customized

    plate

    Solid solution, pickling, trimming

    welded pipe

    Solid solution acid whitening + RT% flaw detection

    Forgings

    Annealing + polishing

    Rod

    Forged state, surface polished or polished

    strip

    Cold rolled, solid solution soft state, descaled delivery

    wire material

    Delivered in solid solution pickled disc shape or straight strip shape, solid solution straight strip in fine polished state

    Note: Incoloy is a registered trademark of Special Metals Group Corporation.