If you can answer these, please do and I'll send her this link.
Thanks!

Hi Rep!
I’ll give this a shot
it won’t be a definitive answer
but that never stopped me before


On the cheap-- casting metals are usually tin or pewter
Pot metals- poured into a casting mold
The metals have a low melt point
used for lots of popular toys & other neat things

Yet --casting metal can be of any type
Rich folk cast gold & silver
and dental work would use some high grade type metals.

Good old wrought iron steel is mixture of iron and carbon
With many different elements variations
depending on the steel’s application
think high grade knife blade and
vanadium may be added to the mix

Now, good old slag is the industrial waste material from melted metal
it is the material the engineers don’t want in the final product
its usually pour off --hot bubbly—flowing down hillsides---
and left to freeze or solidify
find lots of slag by railroad tracks as fillers
and many times its mistaken for meteors
Slag is usually magnetic & look like there from space
but unfortunately-- the meteor I found ---was just slag!

Hopefully others will chip in & l correct my mistakes
good day
roc

Thanks a bunch!