1015 Carbon Steel. Can be drilled, machined, lathed, welded, forged and shaped.....
Soft Polish Carbon Steel is the perfect metal if you want to alter the characteristic of the shape. Much more effective than trying to work with chrome. Can be used for any utility function where exact tolerances are not an issue. Size may even vary +- 2% because it is a G-1000 ball.
2 inch ball weighs 515 grams.