| 摘要 |
PROBLEM TO BE SOLVED: To produce a hot rolled steel sheet having >1.0 average (r) value and >2.0 rD value and excellent in square cylinder drawability, and to provide a method for producing the same. SOLUTION: This hot rolled steel sheet excellent in square cylinder drawability has a compsn. contg., by weight, 0.01 to 0.06% C, <=0.3% Si, 0.1 to 0.5% Mn, <=0.05% P, <=0.02% S, <=0.1% Al, <=0.01% N, 0.005 to 0.05% Nb, contg., at need, one or >= two kinds among <=0.05% Ti, <=0.05% V, <=0.05% Zr, <=0.1% Mo, <=0.05% Cu, <=0.05% Ni, <=0.1% Cr, <=0.005% Ca and <=0.005% rare earth metals by 0.001 to 0.2% in total, and the balance Fe with inevitable impurities, in which the ferrite grain size number is controlled to 10 to 13, also, the plane intensity ratio between the 111} and 112} planes is controlled to >=2.0 and the X-ray plane intensity ratio in the 100} plane is controlled to <=2.0.
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