General Climbing Discussion

Topic	Date	User
Stainless hangers 304 or 316	9-Nov-2012 At 6:05:36 PM	Jim Titt
Message
The dissimilar metal aspect is pretty well irrelevant. The hanger will usualy start to fail under the nut where you can´t see it. Petzl hangers are 316. Glue-ins are far superior in corrosion resistance as they have no stress raisers and no hidden pockets to collect stagnant, corrosive water. Given the choice between a 304 glue-in using an unwelded design and a 316 bolt/hanger I would choose the glue-in every time and this is what we recommend to our customers. Welded-eye designs have proved not to be as satisfactory as the post-weld treatment often fails to passivate the material in the heat affected zone.

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