SCC in chainplates 1

[Kinsa]

thread307-307188
I should like to hear any views people might have on the use of NiAlBr (5% Ni, 11% Al) as chainplate material. It has similar tensile strength to the austenitic stainless steels and is not subject to SCC. It is slightly more expensive (ca. 10%) and readily available but seems to be an "orphan". I have found SCC on most chainplates that I have checked. A quick and dirty test for the microscopic cracks is the hammer test. Suspend chainplate from clevis pin hole with a screwdriver and hit lightly with a hammer. Then reverse and suspend from bottom bolt hole and repeat test. If SCC is present then the difference is unmistakable. Or am I missing some key factor here?

 

[berkshire]

There is a post in thread330-302717 that you might like to follow. It covers some of the questions you are asking.
I do not think there are any answers yet.
B.E.

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