Heavy Melt Steel generally has 2 classifications. #1 Prepared, and Unprepared. #1 Prepared Heavy Melt Steel consists of at least 1/4″ thick steel cut into no more than 2 ft x 5ft sections. Unprepared material is just as the name suggests, large pieces of unprepared Steel and machinery. The Steel should be clean and free of any dirt, debris, or attachments. There should be no Copper , Aluminum , Brass and Bronze, or Stainless Steel attached to the Steel. Cut up pieces of Large Scrap Machinery, Scrap Excavator Buckets, Scrap Excavator tracks, Clean vehicle rims (small and large), and anything that follows the criteria but is not Prepared Plate and Structure.