Ultrahigh strength welded joint and ultrahigh strength welded steel pipe excellent in cold cracking resistance of weld metal, and methods for producing the same
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United States of America Patent
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app pub date -
Jun 15, 2011
filing date -
Jul 25, 2003
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Abandoned
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Abstract
in said inner side weld metal. The present invention also includes a method for producing said welded joint and welded steel pipe, characterized by welding the butted portion from the inner side and thereafter welding it from the outer side so that the reheating temperature of the inner side weld metal may reach within the range from 500° C. to 700° C.
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