Method for producing martensitic stainless steel tubes
Martensitic stainless steel tubes are produced by optimizing the chemical composition of steel for billets (C: 0.15-0.22%, Si: 0.1-1.0%, Mn: 0.10-1.00%, Cr: 12.00-14.00%, N: 0.01-0.05%, P: not more than 0.020% and S: not more than 0.010%) and the relation between the soaking temperature for pierced-...
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Main Author | |
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Format | Patent |
Language | English |
Published |
01.11.2007
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Subjects | |
Online Access | Get full text |
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Summary: | Martensitic stainless steel tubes are produced by optimizing the chemical composition of steel for billets (C: 0.15-0.22%, Si: 0.1-1.0%, Mn: 0.10-1.00%, Cr: 12.00-14.00%, N: 0.01-0.05%, P: not more than 0.020% and S: not more than 0.010%) and the relation between the soaking temperature for pierced-and-rolled tubing material and the section area reduction rate in final rolling. By this method, delayed fracture cracking in impact-receiving portions of tubes in martensitic stainless steel s such as 13% Cr tubes can be inhibited and the generation of inner-surface flaws can be prevented. |
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Bibliography: | Application Number: US20070723622 |