Nippon Steel Corporation

Akira Mikasa

Toshiaki Mizoguchi

Yoshiyuki Ueshima

Yoshiaki Suematsu

Yu Watanabe

Masanobu Hayakawa

Hirotsugu Yasui

Jun Yamaguchi

Steel sheet for cans high in strength and excellent in formability and appearance comprising C: 0.0010 to 0.0035%, Si: 0.050% or less, Mn: 0.10 to 0.50%, P: 0.040% or less, S: 0.040% or less, Al: less than 0.005%, N: 0.0050% or less and a balance of Fe and unavoidable impurities, wherein an average value of a ratio of length of crystal grains in a sheet thickness direction to length in a sheet width direction is 0.70 or more, a yield strength is 500 MPa or more, and, in a range of 0 to 90&#xb0; of the rolling direction, a minimum value of an r-value is 1.50 or more, an average value of the r-value is 1.70 or more, and a difference of the maximum value and minimum value of the r-value is 0.50 or less.

Steel sheet and method of manufacturing same

The present invention provides a continuous casting method of steel preventing alumina and other nonmetallic inclusions becoming causes of slivers and argon bubbles becoming causes of blowholes from being entrained and thereby enabling the production of a cast slab superior in surface and internal quality, that is, one giving an inside boreof an immersion nozzlea horizontal sectional shape of an elliptical shape or oblong shape with a length ratio D/Dof that long axis Dand short axis Dof 1.2 to 3.8, making a direction of that long axis substantially parallel to a long side direction of the casting moldand making the sliding direction of the sliding nozzlea direction perpendicular to said long axis to supply the molten steel in the casting mold. Note that a ratio S/Sof a sectional area Sat a smallest sectional area partof the inside boreand a sectional area Sof a nozzle holeof the sliding nozzleis made 0.5 to 0.95

Continuous casting method of steel

A steel having few alumina clusters prepared by casting liquid steel deoxidized with Al, with the addition of one or more rare-earth metals (REM) selected from the group of Ce, La, Pr and Nd in which:

Steels with few alumina clusters

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Tokai, Japan

Akira Mikasa