ULTRAHIGH STRENGTH STEEL EXCELLENT IN DELAYED FRACTURE RESISTANCE

PROBLEM TO BE SOLVED: To provide an ultrahigh strength steel having >=150kgf/mm tensile strength and excellent in delayed fracture resistance. SOLUTION: This steel has a composition consisting of, by weight, 0.005-0.1% C, 25-35% Ni, 0.01-0.1% Al, further one or >=2 kinds among 0.01-1% Mn, 0.01...

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Bibliographic Details
Main Authors MORIYA YUTAKA, NIIKURA MASAKAZU
Format Patent
LanguageEnglish
Published 28.10.1997
Edition6
Subjects
ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Summary:PROBLEM TO BE SOLVED: To provide an ultrahigh strength steel having >=150kgf/mm tensile strength and excellent in delayed fracture resistance. SOLUTION: This steel has a composition consisting of, by weight, 0.005-0.1% C, 25-35% Ni, 0.01-0.1% Al, further one or >=2 kinds among 0.01-1% Mn, 0.01-0.05% Ti, 0.01-0.05% Zr, and 0.001-0.006% Ca, and the balance iron with inevitable impurities and also has a dual phase structure consisting of martensite and austenite and having 5-60% volume fraction of austenite.
Bibliography:Application Number: JP19960088276