On Wed, 17 Jun 2020 00:05:33 +0100, Dave Plowman (News) wrote:

Steel of any form is useless outdoors. Brass or stainless only,
brass
by preferance, stainless is a bit brittle.

I'd be amazed if you could shear an SS screw before brass?

They went in OK but the failed in use fairly clean break. They were
holding a bit of wood with a gutter bracket attached so there would
be some movement. Replaced with brass of the same size they haven't
failed, well I haven't checked recently but the flapping gutter is a
bit of a give away. B-)

Vague memories of other breakages. Enough that the stainless are only
used for non-critical things. Brass being used for everything else.

--
Cheers
Dave.