Steel for submarine hulls with improved weldability

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United States of America Patent

PATENT NO 9334552
APP PUB NO 20080213121A1
SERIAL NO

11915573

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Abstract

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The invention relates to a steel for the production of submarine hulls having the chemical composition:

description='In-line Formulae' end='lead'0.030%≦C<0.080%description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'0.040%≦Si≦0.48%description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'0.1%≦Mn≦1.4%description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'2%≦Ni≦4%description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'Cr≦0.3%description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'0.30%≦Mo+W/2+3(V+Nb/2+Ta/4)≦0.89%description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'Mo≧0.15%description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'V+Nb/2+Ta/4≦0.004%description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'Nb≦0.004%description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'Cu≦0.45%description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'Al≦0.1%description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'Ti≦0.04%description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'N≦0.0300%description='In-line Formulae' end='tail'

the balance being iron and impurities resulting from the production operation, boron being an impurity whose content is less than 0.0005%, and P+S≦0.015%, the chemical composition complying with the condition:

description='In-line Formulae' end='lead'410≦540×C0.25+245[Mo+W/2+3(V+Nb/2+Ta/4)]0.30≦460.description='In-line Formulae' end='tail'

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Patent Owner(s)

Patent OwnerAddress
INDUSTEEL FRANCE93200 SAINT-DENIS

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Beguinot, Jean Le Creusot, FR 28 168
Chauvy, Cédric Saint Firmin, FR 1 0

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