On Tue, 18 Sep 2018 17:57:02 +0100, Max Demian wrote:

On 18/09/2018 14:36, Terry Casey wrote:
In article ,
says...

What is wrong with stainless steel pet dishes that can be easily cleaned?

We had some.

And then we fitted a magnetically operated cat flap to keep
strange cats out.

The quality of the stainless steel was so bad that, when our
cat went to eat, the magnet on her collar meant that she was
dragging the dishes all tound the room ...

I don't think that the difference between magnetic and non-magnetic
stainless steel is a matter of *quality*, just different alloys.

Magnetic SS has about 18 - 20% chromium - it's basically chrome-iron. My
window hinges are 'SS' and go slightly rusty; the new egress hinges aren't
paramagnetic.
I've just bought some dessert spoons that boast SS and they're magnetic.
'Proper' SS for cutlery, pans etc. will be 18% Cr 8% Ni; Cr to stop rusting
(ha!) and Ni as anti-tarnish.
Ideally, ferritic SS should be more than 18%. At one place that I worked,
some wheel trim was CrFe at 18% and Rolls Royce was, IIRC 22%. Made a lot of
difference in saltspray after chrome plating.
--
Peter.
The gods will stay away
whilst religions hold sway