Diagnosis of the defectology which usually arises when rolling high-performing pipes
DOI:
https://doi.org/10.3989/revmetalm.1995.v31.i1.982Keywords:
Defectology at the rolling-process, High-performing pipe, Qualities C75.1, J55 and Gr A, Standards API 5CT and 5LAbstract
The possible causes are studied which produce the defectology that, incidentally, is usually present at high-performing pipe rolling processes. The steel qualities included in Specification 5CT (1) for grade C75-1 (C-Mn-Mo-alloyed steel) and grade J55 (C-Mn steel) as well as those qualities regarding Specification 5L (2) for grade A of Standard API (American Petroleum Institute) are studied herein. Both chemical and metallurgical characterizations of the pipe are provided. Defects are diagnosed and conclusions are set.
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