Jfe Steel Corporation

Shuji Okada

Yoshimasa Funakawa

Kunio Fukuda

Tomohiro Ishii

Takumi Ujiro

Masayuki Ohta

Toshihiro Kasamo

Katsuhiro Kobori

A ferritic stainless steel sheet for a water heater with excellent corrosion resistance of welds and toughness includes, in terms of mass %, 0.020% or less of C, 0.30 to 1.00% of Si, 1.00% or less of Mn, 0.040% or less of P, 0.010% or less of S, 20.0 to 28.0% of Cr, 0.6% or less of Ni, 0.03 to 0.15% of Al, 0.020% or less of N, 0.0020 to 0.0150% of O, 0.3 to 1.5% of Mo, 0.25 to 0.60% of Nb, and 0.05% or less of Ti, the remainder being composed of Fe and unavoidable impurities, and the ferritic stainless steel sheet satisfying the following formulae (1) and (2):25&#x2266;Cr+3.3Mo&#x2266;30&#x2003;&#x2003;(1)0.35&#x2266;Si+Al&#x2266;0.85&#x2003;&#x2003;(2)wherein Cr, Mo, Si, and Al represent the content (mass %) of Cr, Mo, Si, and Al, respectively.

Ferritic stainless steel sheet for water heater excellent in corrosion resistance at welded part and steel sheet toughness

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Tokyo, Japan

Shuji Okada