Table 1

Fastener Hardness V. Hydrogen Embrittlement Cracking

TABLE 1

Fastener Hardness V. Hydrogen Embrittlement Cracking



Material Specification Hardness (HRC) HE Failure (Yes/No)
17-4 PH 35.0 Yes
Unknown 44.0 Yes
Unknown 39.5 Yes
J429 Gr. 5 27.0 No

 

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