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Baz[_3_] · 24-11-2012, 04:54 PM posted to uk.rec.gardening

Chris J Dixon wrote in
:

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

I remember my dad buying a ss exhaust for his Triumph Dolmite in the 80's.
What a mistake. It cracked every time after numerous replacements. In the
end he reverted back to the origional mild steel type.

Baz