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2 237 100

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IPC

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Application

2003119694/02, 2003-07-03

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Start date

2003-07-03

(22)

Actual filing date

2003-07-03

(45)

Published

2004-09-27

(72)

Inventor

Bobylev M.V.Kulapov A.N.Stepanov N.V.Antonova Z.A.Lekhtman A.A.Gontaruk E.I.Peshev A.D.Lamukhin A.M.Vodovozova G.S.Shtannikov P.A.

(73)

Holder

Obshchestvo S Ogranichennoj Otvetstvennost'Ju Inso"

STEEL OF IMPROVED HARDENABILITY Russian patent published in 2004 - IPC

Abstract RU 2237100 C1

FIELD: metallurgy, in particular constructional high-strength steel for weld-fabricates constructions.

SUBSTANCE: steel of invention contains (mass.%): carbon 0.15-0.21; manganese 0.80-1.10; silicium 0.40-0.80; sulfur 0.003-0.020; chromium 0.50-0.80; molybdenum 0.18-0.28; boron 0.0005-0.0050; aluminum 0.02-0.06; zirconium 0.05-0.10 nitrogen 0.005-0.015; and balance iron and inevitable impurities, with the proviso that (N/20Zr+Al)<=0.12 and (10xB-0.01C)/N>=1.80. Claimed steel exhibits improved hardenability and provides assurance level of useful quality of sheets with thickness up to 32 mm, as well as bar section with diameter 40 mm.

EFFECT: steel excellent in hardenability.

2 cl, 2 tbl, 1 ex

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RU 2 237 100 C1

Authors

Bobylev M.V.

Kulapov A.N.

Stepanov N.V.

Antonova Z.A.

Lekhtman A.A.

Gontaruk E.I.

Peshev A.D.

Lamukhin A.M.

Vodovozova G.S.

Shtannikov P.A.

Dates

2004-09-27—Published

2003-07-03—Filed