Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Metal Industries LtdfiledCriticalSumitomo Metal Industries Ltd
Priority to JP21382487ApriorityCriticalpatent/JPS6457984A/ja
Priority to US07/203,156prioritypatent/US4912295A/en
Priority to FR888807624Aprioritypatent/FR2619736B1/fr
Priority to DE3819720Aprioritypatent/DE3819720A1/de
Publication of JPS6457984ApublicationCriticalpatent/JPS6457984A/ja
Publication of JPH0527515B2publicationCriticalpatent/JPH0527515B2/ja