I know that stainless steel does not attract magnet, I know that stainless steel has appearance that looks like stainless steel, but sometimes it is quite difficult to tell. In addition to magnet test, any further test I can do in my home?
Do you need chelates?Stainless steel contains fair amount of Cr. Cr is the main reason why stainless steels are "stainless".
I never tried this, but I think this is relatively safe (make sure you wear gloves, goggles, and lab coat; do not get the chemicals on your skin) so I'll try my best to answer the OP's question.
You could try partially dissolving stainless steel in acid (for example HCl 1 - 2M), take the water solution, and use some sort of chelating agent. Then you could try using NaOH (1 - 2 M?) to change the pH so that Fe(chelate) precipitates, leaving Cr in the water solution. Check the color and see if it is the supposed to be color of Cr(chelate). I believe this method can be quantitative as well.
I don't know what chelates should be used, so you need to look that up. HCl and NaOH can be bought by general consumers in my country.
Oh yeah, didn't think about that. Haha. Thanks.Do you need chelates?
Qualitative separation of Cr and Fe has other possibilities.
Like ´hydrogen peroxide in basic solution. Fe is oxidized to brown Fe(OH)3 precipitate (you need stronger oxidants for ferrate), while Cr is oxidized to yellow chromate solution.