Nippon Steel Stainless Steel Corporation

Nobuhisa Ebihama

Kazunari Imakawa

Yasuhiro Ehara

Seiji Mitsunaga

A Ti-containing ferritic stainless steel sheet for an exhaust pipe flange member has a composition containing, in mass percentage, from 0.003 to 0.030% of C, 2.0% or less of S i, 2.0% or less of Mn, 0.050% or less of P, 0.040% or less of S, from 10.0 to 19.0% of Cr, 0.030% or less of N, from 0.07 to 0.50% of Ti, from 0.010 to 0.20% of Al, from 0 to 1.50% of Mo, and from 0 to 0.0030% of B, with the balance Fe and unavoidable impurities, has a K value of 150 or more, has a sheet surface hardness of 170 HV or less, and has a sheet thickness of from 5.0 to 11.0 mm. The K value equals &#x2212;0.07&#xd7;Cr&#x2212;6790&#xd7;Free(C+N)&#x2212;1.44&#xd7;d+267, wherein Free(C+N) corresponds to the solid-dissolved (C+N) concentration (% by mass), and d represents an average crystal grain diameter (&#x3bc;m).

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Tokyo, Japan

Nobuhisa Ebihama