Steel sheet having high young'S modulus, hot-dip galvanized...

Details Steel sheet having high young'S modulus, hot-dip galvanized... Steel sheet having high young'S modulus, hot-dip galvanized...

2005-07-27

2011-11-15

Speer, Timothy (Department: 1784)

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

C148S306000, C420S121000

Reexamination Certificate

active

08057913

ABSTRACT:
One aspect of the steel sheet having high Young's modulus includes in terms of mass %, C: 0.0005 to 0.30%, Si: 2.5% or less, Mn: 2.7 to 5.0%, P: 0.15% or less, S: 0.015% or less, Mo: 0.15 to 1.5%, B: 0.0006 to 0.01%, and Al: 0.15% or less, with the remainder being Fe and unavoidable impurities, wherein one or both of {110}<223> pole density and {110}<111> pole density in the ⅛ sheet thickness layer is 10 or more, and a Young's modulus in a rolling direction is more than 230 GPa. Another aspect of the steel sheet having high Young's modulus includes, in terms of mass %, C: 0.0005 to 0.30%, Si: 2.5% or less, Mn: 0.1 to 5.0%, P: 0.15% or less, S: 0.015% or less, Al: 0.15% or less, N: 0.01% or less, and further comprises one or two or more of Mo: 0.005 to 1.5%, Nb: 0.005 to 0.20%, Ti: at least 48/14×N (mass %) and 0.2% or less, and B: 0.0001 to 0.01%, at a total content of 0.015 to 1.91 mass %, with the remainder being Fe and unavoidable impurities, wherein the {110}<223> pole density and/or the {110}<111> pole density in the ⅛ sheet thickness layer is 10 or more, and a Young's modulus in a rolling direction is more than 230 GPa.

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Corresponding European Search Report dated Jan. 8, 2008 of application No. 05767035.8-2122.
Office Action issued in Japanese Patent Application No. 2004-218132 mailed on Oct. 20, 2009 with an English translation.

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