Martensitic stainless steel for oil casing and manufacturing method thereof

Martensitic stainless steel for oil casing and manufacturing method thereof

  • CN 102,534,418 A
  • Filed: 02/29/2012
  • Published: 07/04/2012
  • Est. Priority Date: 02/29/2012
  • Status: Active Application
First Claim
Patent Images

1. oil annular tube Martensite Stainless Steel, its chemical ingredients by weight percentage is:

  • C≤

    0.04%, Si;

    0.20-1%, Mn;

    0.30-1%;

    P≤

    0.02%, S≤

    0.010%, Cr;

    14-17%;

    Ni;

    5%<

    Ni≤

    7%, Mo;

    1.5-2.3%, N;

    0-0.16%;

    Cu;

    0.05-2.5%, and among Nb;

    0.01-0.10%, V;

    0.01-0.10% and the Ti;

    0.01-0.10% one or more, all the other are mainly iron and inevitable micro impurity element.

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