Metal treatment – Stock – Ferrous
Reexamination Certificate
2006-03-22
2011-10-18
Yee, Deborah (Department: 1733)
Metal treatment
Stock
Ferrous
C148S330000, C148S332000, C148S333000, C148S334000, C148S335000, C148S336000, C148S602000, C148S653000, C148S654000
Reexamination Certificate
active
08038809
ABSTRACT:
A high-strength hot-rolled steel sheet containing C: 0.05 to 0.15%, Si: no more than 1.50% (excluding 0%), Mn: 0.5 to 2.5%, P: no more than 0.035% (excluding 0%), S: no more than 0.01% (including 0%), Al: 0.02 to 0.15%, and Ti: 0.05 to 0.2%, which is characterized in that its metallographic structure is composed of 60 to 95 vol % of bainite and solid solution-hardened or precipitation-hardened ferrite (or ferrite and martensite) and its fracture appearance transition temperature (vTrs) is no higher than 0° C. as obtained by impact tests. (% in terms of % by weight).
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Satou Motoo
Soshiroda Tetsuo
(Kobe Steel, Ltd.)
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Yee Deborah
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