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概要

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The 18/8 series of stainless steels which are receiving the attention of both the engineering world and the general public because of their excellent qualities have certain properties which at times interfere with their fullest application. These properties include : excessive hardening on cold working, poor fabricability, loss of ductility at both low and moderate high temperatures, loss of corrosion resistance and intercrystalline corrosion. This paper shows that much of this is due to a physical instability characteristic of certain austenitic alloys. The range of composition subject to this trouble has been mapped out. This paper is purposely limited to a description of steel containing about 18 per cent. of chromium and 8 per cent of nickel. When this class of steel is heated in the range of 500° to 900C° and then cooled, the material is attacked by most corrosive media in an intercrystalline manner. The cause and prevention of this defect has been fully discussed in this paper and the following conclusion has been drawn : Pretreatment materially influences the corrosion resistance of the alloys and the addition of certain chemical elements renders the alloys considerably resistant to corrosion.
社団法人日本鉄鋼協会の論文
1934-03-25