Recycling a Piano plate

[@MrSmithDotShop]

What grade of cast iron are these normal made from?

[@MrSmithDotShop]

I found the answer, Steinway & Sons uses Class 30 gray iron.

[@funkyjohnhuie]

What are you doing with the broken pieces of the cast iron?

[@jamesbrowne2832]

4:08 for the video I Destroyed a piano Plate

[@cherrywilliams5739]

Part of it looks copper.