On 13/01/2017 09:01, charles wrote:
In article ,
Brian Gaff wrote:
Chuckle however not all stainless steel is also goinG to be rust proof.
Most these days are some kind of alloy.

All steels are alloys: Iron and other things

Notably stainless if it contains more than a certain percentage of
chromium. It was invented discovered more than once but it was Brearley
in Sheffield who is usually credited. He was looking for improved gun
barrels. German inventors had some prior art with a 21% Cr 7% Ni steel.

http://www.estainlesssteel.com/histo...esssteel.shtml

Slightly longer and more detailed version here

http://www.bssa.org.uk/about_stainless_steel.php?id=31

Basically he accidentally made a batch he couldn't etch!

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Regards,
Martin Brown