Nippon Steel & Sumikin Stainless Steel Corporation

Nippon Steel Stainless Steel Corporation

Tooru Matsuhashi

Nobuhiko Hiraide

Eiichiro Ishimaru

Naoto Ono

Michio Nakata

Yuuichi Tamura

Noriyo Morihiro

Satoshi Sampei

Jun Tokunaga

This clear-coated stainless steel sheet () includes a stainless steel sheet (), and a clear-coated film () formed on at least one surface () of the stainless steel sheet () and having an average film thickness of 0.05 μm or more and 3.00 μm or less.

Clear-coated stainless steel sheet

A ferritic stainless steel and a heat exchanger using the ferritic stainless steel are provided. The ferritic stainless steel includes, in mass %, C: 0.030% or less, N: 0.020% or less, Si: 0.5% or less, Mn: 1.0% or less, P: 0.05% or less, S: 0.01% or less, Cr: 16% to 25%, Nb: 0.05% to 1.0%, Al: 0.003% to 0.20%, and a balance comprising Fe and unavoidable impurities. The Al oxide is present on the surface of the material, the surface coverage ratio by the Al oxide is 5% to 70%, the surface roughness in Ra measured by red laser is 0.010-0.15 &#x3bc;m, and the thickness from the surface to the point, which includes the value of a half peak of the Al content on the surface, satisfies 300 nm or less, the value of a half peak of the Al content in an elemental profile expressed by a cation ratio.

Ferritic stainless steel and method for producing same, and heat exchanger equipped with ferritic stainless steel as member

One aspect of this ferritic stainless steel sheet contains, by mass %, C: 0.03% or less, N: 0.05% or less, Si: 1% or less, Mn: 1.2% or less, Cr: 14% or more and 28% or less, Nb: 8(C +N) or more and 0.8% or less, and Al: 0.1% or less, with a balance being Fe and inevitable impurities, in which a film satisfying Expression 1 is formed in a surface thereof. Expression 1 is d&#xd7;Cr+5(Si+3Al)&#x2264;2.0. In Expression 1, drepresents a thickness (nm) of the film, Crrepresents a Cr cationic fraction in the film, Sirepresents a Si cationic fraction in the film, and Alrepresents an Al cationic fraction in the film.

Ferritic stainless steel sheet having excellent brazability, heat exchanger, ferritic stainless steel sheet for heat exchangers, ferritic stainless steel, ferritic stainless steel for members of fuel supply systems, and member of fuel supply system

This ferrite stainless steel includes: by mass %, C: 0.020% or less; N: 0.025% or less; Si: 1.0% or less; Mn: 0.5% or less; P: 0.035% or less; S: 0.01% or less; Cr: 16% to 25%; Al: 0.15% or less; Ti: 0.05% to 0.5%; and Ca: 0.0015% or less, with the balance being Fe and inevitable impurities, wherein the following formula (1) is fulfilled,BI=3Al+Ti+0.5Si+200Ca&#x2266;0.8&#x2003;&#x2003;(1)

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Hikari, Japan

Tooru Matsuhashi