I finally finished making a rack for my metal stock (only took 10
years...). I purchased a bunch of leaded steel 12L14(?) in a group buy
with my metalworking group about the time I started the rack.
Unfortunately, I don't recall which steel bars are the 12L stuff.

Is there an easy way to tell it from CRS or mild steel other than machining
a piece? Would one of the lead paint testers from a hardware store work?

Thanks!

Doug White