Hydrogen Embrittlement Properties of Stainless Steels in High Pressure Gaseous Hydrogen Environment

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  • Omura Tomohiko
    Corporate Research and Development Laboratories, Sumitomo Metal Industries, Ltd.
  • Kobayashi Kenji
    Corporate Research and Development Laboratories, Sumitomo Metal Industries, Ltd.
  • Miyahara Mitsuo
    Corporate Research and Development Laboratories, Sumitomo Metal Industries, Ltd.
  • Kudo Takeo
    Corporate Research and Development Laboratories, Sumitomo Metal Industries, Ltd.

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Other Title
  • 高圧水素ガス環境におけるステンレス鋼の脆化特性
  • コウアツ スイソ ガス カンキョウ ニ オケル ステンレス コウ ノ ゼイカ トクセイ

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Abstract

Highly pressurized hydrogen gas is one of the most effective media for storage and transport of hydrogen for fuel cells. Mechanical properties of an aluminum alloy and austenitic stainless steels were investigated by Slow Strain Rate Testing (SSRT) in hydrogen environment pressurized at 45MPa, for ensuring the safety of materials used for the compressed hydrogen system. A6061-T6 aluminum alloy and stable austenitic stainless steel 316L showed no evidence of embrittlement even at extremely low strain rates (3×10-7-3×10-6s-1). In contrast, metastable austenitic stainless steel 304L showed considerable degradation of ductility in the hydrogen environment due to strain-induced martensitic transformation. Susceptibility to hydrogen environment embrittlement (HEE) could be discussed based on hydrogen content absorbed into the materials and threshold stress.

Journal

  • Zairyo-to-Kankyo

    Zairyo-to-Kankyo 55 (4), 139-145, 2006

    Japan Society of Corrosion Engineering

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