Steel materials having an excellent hydrogen induced...

Details Steel materials having an excellent hydrogen induced... Steel materials having an excellent hydrogen induced...

C - Chemistry, Metallurgy

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C

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C22C 38/04 (2006.01) C22C 38/60 (2006.01)

Patent

CA 1090618

ABSTRACT OF THE DISCLOSURE Steel materials having an excellent hydrogen induced cracking resistance when used for, for example oil pipes and LPG tank materials as well as steels for line pipes under atmosphere containing H2S, which contain 0.05 to 0.20% of C, 0.01 to 0.50% of Si, 0.60 to 2.00% of Mn, 0.01 to 0.10% of A?, less than 0.0020% of S, Ca of 0.0020% to less than 0.0050%. These steel materials are increased in the tensile strength by additionally containing at least one of Cu, Ni, Cr, B, Mo, Nb, V, Zr and Ti. Furthermore the effect of addition of Ca is stabilized by adding rare-earth elements.

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