420 Mod - UNS S42000

     

    420 Mod is a Martensitic Stainless Steel with 13% Chromium and a restricted carbon range. 420 Mod is allowed by NACE MR0175 for limited sour service with a maximum of 1.5 psi maximum H2S partial pressure. It has excellent corrosion resistance in sweet environments.

     

    420 Mod Specification/Condition

    • NACE MR0175 / ASTM A484

    Applications

    • structural and pressure containing tools
    • packers
    • drill collars
    • mandrels

    420 Mod technical data

    • UTS (KSI): 95 Min
    • Yield 0.2% Offset (KSI): 80 Min
    • EL (% Min): 20
    • RA (% Min): 40
    • Maximum Hardness (HRC): 22
    • Charpy Impact Min. ft-lbs: –

    Dimensions

    • 2.5 – 10.0 in

    420 Mod Chemical composition (Wt %)

     

    Carbon
    (C)
    Manganes
    (Mn)
    Phosphorus
    (P)
    Sulfur
    (S)
    Silicon
    (Si)
    Nickel
    (Ni)
    Cobalt
    (Co)
    0.18-0.22 Max 1.00 Max 0.02 Max 0.010 Max 1.0 Max 0.50 Max

     

    Chromium
    (Cr)
    Molybdenum
    (Mo)
    Niobium + Tantalum
    (Nb (Cb) + Ta)
    Titanium
    (Ti)
    Copper
    (Cu)
    Aluminum
    (Al)
    Iron (Fe) & Others
    12.0-14.0 0.25 Max Fe– Balance

     

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