covered wagon wrote:
steve68steve wrote:
covered wagon wrote:
... You can tell the better screws using a magnef as the will have little or no magnetic attraction. Meaning having no iron in them.
The main ingredient in stainless steel is still iron. The reason it doesn't oxidize is because there's chromium alloyed with the iron. Iron can exist in different crystal lattice shapes - not all of them are magnetic.
Good stainless is mostly cadmium and nickle. The very best SS has little or no iron and won't magnetize at all. I've got some screws that won't attract at all.
Stainless
Steel without iron isn't steel and as Steve pointed out, the magnetism has nothing to do with a lack of iron but its crystal shape (look up austenitic stainless steel).