Biphasic stainless steel line pipe with yield strength of 555 MPa or above and manufacturing method thereof

Biphasic stainless steel line pipe with yield strength of 555 MPa or above and manufacturing method thereof

  • CN 104,264,058 A
  • Filed: 09/19/2014
  • Published: 01/07/2015
  • Est. Priority Date: 09/19/2014
  • Status: Active Application
First Claim
Patent Images

1. a yield strength is at 555MPa and above duplex stainless steel line pipe, its microtexture is martensite and ferrite, it is characterized in that, its chemical element percent mass proportioning is:

  • C;

    0.03 ~ 0.07%, Si;

    0.1 ~ 0.4%, Mn;

    0.1 ~ 0.5%, Cr;

    13.5 ~ 15.0%, Ni;

    0.6 ~ 1.5%, Mo;

    0.2 ~ 1.0%, N;

    0.002 ~ 0.08%, and the mass percentage of each element meets Cr+1.5Mo+2Ni+16N >

    =16.5, Ni-3 (C+N) >

    =0.5, Nb+V+Ti≤

    0.1, all the other are Fe and inevitable impurity element.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×