On 22/01/2020 17:29, PeterC wrote:
On Wed, 22 Jan 2020 15:36:36 +0000, newshound wrote:

On 22/01/2020 15:31, Roger Hayter wrote:
Tim Lamb wrote:

Konhard CS002 (Amazon)

Umm.. claimed to be brushed stainless steel. Looks more like good
quality chrome to me.

Non magnetic so not mild steel. I'll report back in a few years:-)

Having acquired a Chinese stainless steel gate fitting, I learnt from
this very group that some stainless steel is prone to surface rust when
damp, despite its name.

Cheap cutlery is often marginal in chrome content, you can get rust
spots that can just about be cleaned off with scotchbrite or similar.

Cutlery tends to be 18% chromium and is magnetic (para- only?)

A bit of a simplification. 18Cr 8Ni is austenitic, and non magnetic.
Ferritic stainless steels are 13 to 18% Cr and are magnetic.

I'd bet that the (non-magnetic) caddy is austenitic stainless. It might
suffer rust spotting or staining in some circumstances (like the steel
wool case mentioned elsewhere)


; 18 10 isn't
magnetic and shouldn't rust.
I don't know what A2 st. st. is, but it withstands 10 years+ of salt.

ICBA to look it up properly. "A2" tends to be the base designation for
stainless steel screws and fasteners, I think it is normally austenitic.

"A4" is sometimes called marine grade stainless, that will definitely
withstand salt, it has a higher content of alloying elements and will
definitely be austenitic.


Rolls Royce wheel trim was 22% chromium and hard chrome plated and polished
- that didn't rust in 72 hr. salt spray but the 18% did.

That's what I would call a Rolls Royce solution.