Quote Originally Posted by happyscraper View Post
I say if a magnet sticks or is drawn to it then it is tin that is added to the copper. A magnet will not be drawn to aluminum or copper but I have never seen a magnet fall off of tin. My .02
Tin by itself is not magnetic. What is commonly refered to as tin is actually steel which may or may not have a thin layer of tin plated on to it.