What is HRPO steel?
Abbreviation: HRPO
Related Terms
Hot-Rolled Steel(HR)
Hot-rolled steel is produced by rolling steel at high temperature (above recrystallization point). It has a rough mill scale surface and looser tolerances than cold-rolled, but is less expensive and widely stocked.
Cold-Rolled Steel(CR)
Cold-rolled steel is processed further after hot-rolling by passing through rollers at room temperature. It has tighter dimensional tolerances, a smoother surface finish, and higher strength than hot-rolled.
Pickling and Oiling(P&O)
Pickling removes mill scale from hot-rolled steel using acid, and oiling applies a thin protective oil coat to prevent rust. The result is HRPO steel — a cleaner surface for stamping and laser cutting.
Steel Blank
A steel blank is a metal blank made from steel — typically carbon steel, stainless steel, or alloy steel — cut to size for further processing such as stamping, laser cutting, or machining.
Mill Finish
Mill finish is the surface condition of metal as it comes directly from the rolling mill — no additional polishing or treatment. It often has a dull, slightly rough appearance with mill scale on hot-rolled steel.