HIGH-STRENGTH CORROSION-RESISTANT WELDED STEEL FOR PIPELINES

steelmaking. SUBSTANCE: steel contains, wt %: carbon 0.05-0.10, silicon 0.3- 0.6, manganese 1.0-1.5, chromium 14.0-16.0, nickel 3.5-4.5, molybdenum 1.5-2.0, titanium 0.15-0.35, aluminum 0.02- 0.05, nitrogen 0.01-0.05, and iron - the balance. Ratio of nickel equivalent to chromium equivalent is expre...

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Main Authors PAVLOV V.N, KHOKHLOV A.A, KARZOV G.P, KRYLOVA R.P, AZBUKIN V.G, OSIPOVA I.S, FILIMONOV G.N, BEREZHKO B.I, KUDRJAVTSEVA I.V, BASHAEVA E.N, MINCHENKO N.A, POPOV O.G
Format Patent
LanguageEnglish
Published 10.09.2002
Edition7
Subjects
ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Summary:steelmaking. SUBSTANCE: steel contains, wt %: carbon 0.05-0.10, silicon 0.3- 0.6, manganese 1.0-1.5, chromium 14.0-16.0, nickel 3.5-4.5, molybdenum 1.5-2.0, titanium 0.15-0.35, aluminum 0.02- 0.05, nitrogen 0.01-0.05, and iron - the balance. Ratio of nickel equivalent to chromium equivalent is expressed by following equation: Ni/Cr = [30(C+N)+Ni + 1.5Mn]/(Cr + Mo + 1.55Si + 4Ti + 3.5Al) and lies between 0.4 and 0.55. Content of trace elements do not exceed following values, wt %: sulfur 0.02, phosphorus 0.02, and copper 0.2. Steel can be used for pipelines operated in undersea production of minerals and oil. EFFECT: increased resistance against crevice and pitting corrosion, hydroabrasive wear at preserved level of resistance against intercrystallite corrosion, and corrosion cracking. 2 cl, 3 tbl
Bibliography:Application Number: RU20010105858