JPH0257441B2 - - Google Patents

Info

Publication number
JPH0257441B2
JPH0257441B2 JP20748385A JP20748385A JPH0257441B2 JP H0257441 B2 JPH0257441 B2 JP H0257441B2 JP 20748385 A JP20748385 A JP 20748385A JP 20748385 A JP20748385 A JP 20748385A JP H0257441 B2 JPH0257441 B2 JP H0257441B2
Authority
JP
Japan
Prior art keywords
mandrel
diameter
point
present
steel
Prior art date
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.)
Expired
Application number
JP20748385A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6264410A (ja
Inventor
Wataru Nishihama
Yoshuki Hashimoto
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.)
Sanyo Special Steel Co Ltd
Original Assignee
Sanyo Special Steel Co 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 Sanyo Special Steel Co Ltd filed Critical Sanyo Special Steel Co Ltd
Priority to JP20748385A priority Critical patent/JPS6264410A/ja
Publication of JPS6264410A publication Critical patent/JPS6264410A/ja
Publication of JPH0257441B2 publication Critical patent/JPH0257441B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Metal Extraction Processes (AREA)
JP20748385A 1985-09-18 1985-09-18 中空鋼の製造方法 Granted JPS6264410A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20748385A JPS6264410A (ja) 1985-09-18 1985-09-18 中空鋼の製造方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20748385A JPS6264410A (ja) 1985-09-18 1985-09-18 中空鋼の製造方法

Publications (2)

Publication Number Publication Date
JPS6264410A JPS6264410A (ja) 1987-03-23
JPH0257441B2 true JPH0257441B2 (enrdf_load_stackoverflow) 1990-12-05

Family

ID=16540491

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20748385A Granted JPS6264410A (ja) 1985-09-18 1985-09-18 中空鋼の製造方法

Country Status (1)

Country Link
JP (1) JPS6264410A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPS6264410A (ja) 1987-03-23

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