Cold-rolled steel strip having excellent combined press formability and method of producing same

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EP 0 484 960 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	03.03.1993 Bulletin 1993/09

(43)	Date of publication A2:
	13.05.1992 Bulletin 1992/20

(21)	Application number: 91119058.5

(22)	Date of filing: 08.11.1991

(51)	International Patent Classification (IPC)⁵: C21D 8/04, C22C 38/14

(84)	Designated Contracting States:
	AT CH DE FR GB IT LI

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Priority:

09.11.1990 JP 302697/90
27.11.1990 JP 321054/90

(71)	Applicant: NIPPON STEEL CORPORATION
	Tokyo (JP)

(72)	Inventors:
	Yamada, Teruaki, c/o Hirohata Seitetsusho Himeji-shi (JP) Oda, Masahiko, c/o Hirohata Seitetsusho Himeji-shi (JP) Nishimoto, Yuzo, c/o Hirohata Seitetsusho Himeji-shi (JP) Kubo, Hiroshi, c/o Hirohata Seitetsusho Himeji-shi (JP) Nouno, Michihiro, c/o Hirohata Seitetsusho Himeji-shi (JP)

(74)	Representative: VOSSIUS & PARTNER
	Postfach 86 07 67 81634 München 81634 München (DE)

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References cited: :

(54)	Cold-rolled steel strip having excellent combined press formability and method of producing same

(57) A steel strip of a specific composition has tensile strength in 45° direction of 28.5 to 31.0 kgf/mm² and r value in 45° direction of not less than 1.90. The steel strip exhibits excellent combined press formability. This steel strip is produced by continuous annealing.

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