| 摘要 |
PURPOSE: A ferritic stainless steel sheet is provided which exhibits superior processability and high corrosion resistance to deteriorated gasoline and is useful for automobile fuel tanks and fuel pipes. CONSTITUTION: The ferritic stainless steel sheet for fuel tanks and fuel pipes comprises about 0.1 wt.% or less of C, about 1.0 wt.% or less of Si, about 1.5 wt.% or less of Mn, about 0.06 wt.% or less of P, about 0.03 wt.% or less of S, about 1.0 wt.% or less of Al, about 11 wt.% to about 20 wt.% of Cr, about 2.0 wt.% or less of Ni, about 0.5 wt.% to about 3.0 wt.% of Mo, about 0.02 wt.% to about 1.0 wt.% of V, about 0.04 wt.% or less of N, at least one of about 0.01 wt.% to about 0.8 wt.% of Nb and about 0.01 wt.% to about 1.0 wt.% of Ti and the balance of Fe and incidental impurities. The method for making a ferritic stainless steel sheet for fuel tanks and fuel pipes comprises the steps of rough-rolling a slab comprising about 0.1 wt.% or less of C, about 1.0 wt.% or less of Si, about 1.5 wt.% or less of Mn, about 0.06 wt.% or less of P, about 0.03 wt.% or less of S, about 1.0 wt.% or less of Al, about 11 wt.% to about 20 wt.% of Cr, about 2.0 wt.% or less of Ni, about 0.5 wt.% to about 3.0 wt.% of Mo, about 0.02 wt.% to about 1.0 wt.% of V, about 0.04 wt.% or less of N, at least one of about 0.01 wt.% to about 0.8 wt.% of Nb and about 0.01 wt.% to about 1.0 wt.% of Ti and the balance of Fe and incidental impurities; hot-rolling the rough-rolled sheet under a linear pressure of at least about 3.5 MN/m at a final pass in the finish rolling; cold-rolling the hot-rolled sheet at a gross reduction rate of at least about 75%; and annealing the cold-rolled sheet.
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