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Chris J Dixon · 20-11-2012, 01:53 PM posted to uk.rec.gardening

wrote:

In article ,

Probably due to metal fatigue. It's like breaking a piece of wire by bending
it back and forth several time until it breaks!
You have probably unknowingly bent it at that point many times before and it
bent back. This time it didn't:-)

And, actually, most stainless and high-tensile steels ARE brittle
compared to most mild steels. They will get fatigue first rather
than work-hardening, which is what the latter usually does.

Indeed. There was a time, when standard car exhausts were a lot
less durable than they now seem to be, that stainless steel
replacements were available, at a price, with warranty for as
long as you owned the vehicle.

The small print laid down conditions relating to the state of the
engine mounts. If there was a failure, it hadn't corroded, but
had simply been shaken apart.

Chris
--
Chris J Dixon Nottingham UK

Have dancing shoes, will ceilidh.