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2 188 874

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C1

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Application

2001105858/02, 2001-03-01

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Start date

2001-03-01

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Actual filing date

2001-03-01

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Published

2002-09-10

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Inventor

Azbukin V.G.Bashaeva E.N.Pavlov V.N.Karzov G.P.Filimonov G.N.Berezhko B.I.Osipova I.S.Minchenko N.A.Krylova R.P.Khokhlov A.A.Kudrjavtseva I.V.Popov O.G.

(73)

Holder

Federal'Noe Gosudarstvennoe Unitarnoe Predprijatie Tsentral'Nyj Nauchno-Issledovatel'Skij Institut Konstruktsionnykh Materialov

HIGH-STRENGTH CORROSION-RESISTANT WELDED STEEL FOR PIPELINES Russian patent published in 2002 - IPC

Abstract RU 2188874 C1

FIELD: 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

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RU 2 188 874 C1

Authors

Azbukin V.G.

Bashaeva E.N.

Pavlov V.N.

Karzov G.P.

Filimonov G.N.

Berezhko B.I.

Osipova I.S.

Minchenko N.A.

Krylova R.P.

Khokhlov A.A.

Kudrjavtseva I.V.

Popov O.G.

Dates

2002-09-10—Published

2001-03-01—Filed

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