Title:
PRODUCTION OF MARTENSITIC STAINLESS STEEL SEAMLESS PIPE HAVING EXCELLENT LOW-TEMPERATURE TOUGHNESS AND STRESS CORROSION CRACKING RESISTANCE
Document Type and Number:
Japanese Patent JPH05117749
Kind Code:
A
Abstract:
PURPOSE: To produce the martensitic stainless steel seamless pipe having excel lent low-temp. toughness and stress corrosion cracking resistance by Mannes mann process.
CONSTITUTION: The reduction ratio expressed by a reduction of area in a 600 to 1000°C temp. range is given in a 13 to 90% range and the steel is cooled at 2 to 30°C/sec cooling rate in a temp. range down to 400 to 500°C right after the end of the final hot finish rolling to form the martensitic structure; thereafter, the steel is subjected to a tempering treatment in the final hot finish rolling stage.
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Inventors:
SHIMIZU TETSUO
Application Number:
JP30846691A
Publication Date:
May 14, 1993
Filing Date:
October 28, 1991
Export Citation:
Assignee:
KAWASAKI STEEL CO
International Classes:
C21D8/10; C21D9/08; (IPC1-7): C21D8/10; C21D9/08
Attorney, Agent or Firm:
Eiichi Kobayashi
Previous Patent: JPS5117748
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