HRPO (Hot Rolled Pickled and Oiled) steel is heated above its recrystallization temperature, then pickled to remove scale and coated with oil to prevent rust. It offers a better surface finish and is easier to weld and fabricate compared to raw hot rolled steel. Cold rolled steel, on the other hand, is rolled at room temperature, resulting in tighter tolerances, a smoother surface, and higher strength. However, it’s usually more expensive and less flexible for heavy-duty fabrication.

Mild steel HRPO is a great choice for CNC machining services because of its consistent thickness, good machinability, and cost-effectiveness. The hot rolled pickled surface reduces scale and imperfections that could affect tool wear or tolerances during precision CNC processing. Its balanced combination of strength and ductility makes it easier to cut cleanly, helping achieve accurate parts for applications ranging from mild steel fabrication to custom manufacturing.