Alloy 20

Alloy 20 is a nickel-iron-chromium based austenitic super alloy with additions of Copper and Molybdenum. This provides excellent corrosion resistance to several different variables. Such As, hostile environments, pitting, and crevice corrosion. Proven to be useful the oil and gas, food processing, chemical and pharmaceutical industries to name a few. Application of the alloy could result in exceptional cost savings when carefully compared to other more expensive alloys. Determine if the desired resistance is obtained in the chosen applications and environment and are limited to a maximum temperature of 1000°F per ASME.

  • Composition

    Nickel, 32–38%
    Chromium, 19–21%
    Carbon, 0.06% maximum
    Copper, 3–4%
    Molybdenum, 2–3%
    Manganese, 2% maximum
    Silicon, 1.0% maximum
    Niobium, 1% maximum
    Iron, 31–44% (balance)

  • Other Names

    UNS N08020
    DIN 2.4660
    Carpenter 20 CB-3TM
    AL 20TM
    Carlson Alloy C20TM
    Nickelvac 23TM
    Nicrofer 3620 NbTM, also known as VDM® Alloy 20

  • Specifications

    ASME SB729, SB464, SB366, SB473, SB462
    ANSI / ASTM A555-79
    EN 2.4660
    UNS N08020
    Werkstoff 2.4660
    Castings are designated CN7M

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