Identification Of Metals | Smithy - AutoMate CNC - Detroit Machine…
These spark patterns provide general information about the type of steel, cast iron, or alloy steel. This test forces a hardened ball, 10 mm (0.3937 in) in diameter, into the surface of the metal being tested, under a load of 3,000 Free Cutting Manganese, X13XX . Milling, Drilling And Slotting Attachments · Chapter 6.