Seamless steel pipe and method for manufacturing same

Seamless steel pipe and method for manufacturing same

  • CN 102,224,268 A
  • Filed: 11/26/2009
  • Published: 10/19/2011
  • Est. Priority Date: 11/26/2008
  • Status: Active Application
First Claim
Patent Images

1. a weldless steel tube is characterized in that,This weldless steel tube is made of low alloy steel, this low alloy steel contains C:

  • 0.10~

    0.20% in quality %, Si;

    0.05~

    1.0%, Mn;

    0.05~

    1.2%, Ni;

    0.02~

    1.0%, Cr;

    0.50~

    1.50%, Mo;

    0.50~

    1.50%, Nb;

    0.002~

    0.10% and Al;

    0.005~

    0.10%, and a kind of in Ti;

    0.003~

    0.050% and V;

    0.01~

    0.20% or two kinds, remainder is made of Fe and impurity, P in the impurity is below 0.025%, S is below 0.005%, N is below 0.007%, B is less than 0.0003%, the tensile strength of this weldless steel tube is more than the 950MPa and yield strength is more than the 850MPa, and the summer in the time of-40 ℃

    is more than the 60J than absorbing merit.

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