Hot Rolled
Hot rolled surface conditions include as-rolled or thermally treated finishes (i.e. annealed, normalized or quench and tempered). This process leaves a light mill oxide on the surface.
Hot rolled bars are inspected and surface-conditioned. They generally receive further processing by the customer such as forging or machining.
Rough Turned
Rough-turned bars are produced by machining the outside surface of hot rolled bar stock. All surface defects and decarburization are removed from the outside surface of the full length of the bar. This is done on a machine where tools are mounted in a ring that is rotated around the bar.
Turned bars are used for special applications where the customer needs a close outside diameter tolerance and/or a clean outside surface.