There are so many metals how do you identify them all

I have been at this scrap stuff for a while. Most of it I get and I have figured out that removing small bits of steel and other materials from say brass radiators and sweat fittings from copper will make them clean and worth more but when it comes to stainless steel it gets a bit fuzzy. The yard I sell my scrap to says currently stainless is not worth much more than regular steel so I have not been removing it from appliances I junk out. Most of the stainless I get is the magnetic type. I know there is non magnetic stainless and have had a few items like an old coffee pot recently. I have had many 500 plus pound Viking appliances that were nothing but magnetic stainless inside and out. The front's on them unscrew easily. I scrapped a few of the outer skins separately from the rest of my steel to see and found it paid about the same. So can anyone explain the differences between non magnetic and magnetic stainless steel and which is worth more for scrap.

It takes a lot of time to figure out metals ...
Low grade stainless isn't worth much, unless you sell sheets of it to a metal working shop ( or make an awesome tool box out of it ) !

Very informative link

The sheets are nice looking and would be great repurposed. Thanks

Prices by me
Stainless Steel $.16 lb.
Dirty Stainless $.07 lb.
Sheet Iron $.0275 lb.
Clean Sheet Iron $.0375

So I do keep my Stainless and Dirty Stainless out of the steel pile as it pays more.

My yard, like many, categorizes it as magnetic and non-magnetic stainless. Magnetic just pays as steel shred. Non-magnetic is worth saving though I dont know what my current price would be

I have been told that "Magnetic Stainless Steel with a very low 'pull' (magnetic attraction) is actually a high grade 'Nonmagnetic Stainless steel".

On the theory that its actually got a very high Nickel content and its actually the Nickel that's magnetic.

So, is this true? And how can someone ca$h up on it if it is?