| 摘要 |
PROBLEM TO BE SOLVED: To provide a steel sheet for a vessel, which can manufacture an ultrathin material used for the vessel in a high productivity without reducing sheet passability in annealing, and reduces cracking due to fatigue at a weld, which is a problem occurring in service, along with improving formability when being manufactured into cans and formability in the weld, and to provide a manufacturing method therefor. SOLUTION: This steel sheet includes, by mass%, 0.0030% or less C, 0.020% or more S, and 0.0080% or less N, wherein B/N is 0.40-2.70, Al/B is 30 or less, Al is 0.040% or less, and (N existing as AlN)/(N existing as BN) is less than 0.40 as needed. Then the steel sheet is superior in workability, can reduce cracking by concentrated stress attributed to weldability, and further can be efficiently manufactured while circumventing heat buckle, because of acquiring adequate characteristics after having been annealed even at a low temperature. COPYRIGHT: (C)2003,JPO
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