PRECIPITATION HARDENING TYPE ALLOY FOR HIGH STRENGTH OIL WELL PIPE WITH SUPERIOR STRESS CORROSION CRACKING RESISTANCE

PURPOSE:To obtain a precipitation hardening type alloy for a high strength oil well pipe with superior stress corrosion cracking resistance by adding C, Si, Mn, P, S, N, Ni, Cr, Nb, etc. in a specified ratio. CONSTITUTION:An alloy consisting of, by weight, <=0.1% C, <=1.0% Si, <=2.0% Mn, &l...

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Main Authors KUDOU TAKEO, IKEDA AKIO, MOROISHI DAIJI, YOSHIKAWA KUNIHIKO, OKADA YASUTAKA, OOTANI YASUO
Format Patent
LanguageEnglish
Published 24.12.1982
Subjects
ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Summary:PURPOSE:To obtain a precipitation hardening type alloy for a high strength oil well pipe with superior stress corrosion cracking resistance by adding C, Si, Mn, P, S, N, Ni, Cr, Nb, etc. in a specified ratio. CONSTITUTION:An alloy consisting of, by weight, <=0.1% C, <=1.0% Si, <=2.0% Mn, <=0.030% P, <=0.005% S, 0.05-0.25% N, 30-60% Ni, 15-35% Cr, <=12% Mo and/or <=24% W, and the balance Fe with inevitable impurities while satisfying Cr%+10Mo%+5W%>=110% and 7.5%<=Mo+1/2W%<=12% is prepared. To said composition may be added <=2% Cu and/or <=2% Co, and/or 1 or >=2 kinds of elements selected from <=0.1% rare earth element, <=0.20% Y, <=0.10% Mg and <=0.10% Ca.
Bibliography:Application Number: JP19810093174