Method of producing steel pipe material for oil well

Details Method of producing steel pipe material for oil well Method of producing steel pipe material for oil well

C - Chemistry, Metallurgy

21

D

148/50

C21D 9/08 (2006.01)

Patent

CA 1120831

ABSTRACT OF THE DISCLOSURE: The method of producing steel pipe material for an oil well is characterized in that, as for the chemical composi- tion of steel, B contained steel is adopted avoiding the addition of Ti which increases the values of non-metallic inclusions to decrease machinability, the value of N is limited to not more than 0.003$ to be decreased in content of nitrides, coarse crystal grains due to the decreased content of N are prevented through austenizing of steel under rapid heating, so that such a steel pipe material for an oil well can be obtained that which has resistance to sulfide stress corrosion in addition to satisfactory strength and machinability.

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