High-strength and high-toughness steel plate with yield strength of 700 MPa and method of manufacturing the same

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United States of America Patent

PATENT NO 9771639
SERIAL NO

14129103

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Abstract

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The present invention relates to a high-strength high-toughness steel plate and a method of manufacturing the steel plate. The steel plate contains the following chemical compositions, by weight, C: 0.03-0.06%, Si≦0.30%, Mn: 1.0-1.5%, P≦0.020%, S≦0.010%, Al: 0.02-0.05%, Ti: 0.005-0.025%, N≦0.006%, Ca≦0.005%, and more than one of Cr≦0.75%, Ni≦0.40%, Mo≦0.30%, other compositions being Ferrum and unavoidable impurities. The finished steel plate, with a thickness of 6-25 mm, has a yield strength of ≧700 MPa, an elongation A50 of ≧18%, Akv at −60° C. of ≧150 J and good cool bending property.

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Patent Owner(s)

Patent OwnerAddress
BAOSHAN IRON & STEEL CO LTDSHANGHAI 201900

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Jiao, Sihai Shanghai, CN 21 17
Zhang, Aiwen Shanghai, CN 6 15
Zhang, Qingfeng Shanghai, CN 14 77

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