材料
Online ISSN : 1880-7488
Print ISSN : 0514-5163
ISSN-L : 0514-5163
安定化ステンレス鋼溶接部の長時間時効によるポリチオン酸応力腐食割れ感受性の推定
深井 利嗣喜田 裕安斉 利男
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1988 年 37 巻 412 号 p. 11-16

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The susceptibility to polythionic acid stress corrosion cracking of stabilized austenitic stainless steel weldments was investigated as a function of their sensitization measured by EPR method. The results showed that type 321 and 347 stainless steels became susceptible to stress corrosion cracking when the sensitization index in EPR test exceeded the value of 10%.
In order to prevent the stress corrosion cracking of the weldment throughout the long time service of 105 hours or more, some countermeasures such as a stabilizing heat treatment should be provided to the type 321 and 347 weldments when they are used over 480°C and 430°C, respectively.

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