Hot Rolled Corten Plate/Coil refers to weathering steel (Corten steel) products manufactured through the hot rolling process, widely known under material standards such as ASTM A588, A242, COR-TEN® A/B, S355J0WP, Q355NH, Q345GNH, etc.
1. Basic Definition
Corten steel: A high-strength, low-alloy steel containing small amounts of Cu, P, Cr, Ni that forms a dense, protective patina in the atmosphere to slow down corrosion.
Hot rolled: The steel is heated above recrystallization temperature (around 1200°C) and rolled into plates or coils while hot, then cooled in air or under controlled cooling.
2. Main Characteristics of Hot Rolled Corten
Thicker dimensions: Typically from 1.5 mm up to 100 mm or more; coils are usually thinner and wider for continuous processing.
Rougher surface finish: Dark oxide scale on the surface, not as smooth as cold-rolled steel.
Higher strength and better toughness compared to cold-rolled Corten in thick sections.
Lower internal stress: Less prone to warping than cold-rolled products.
Lower production cost than cold-rolled Corten.
3. Typical Forms
Hot Rolled Corten Plate: Cut-to-length sheets for structural parts, building facades, signage, sculptures, shipping containers.
Hot Rolled Corten Coil: Coiled strips for further processing (cutting, bending, welding, stamping).
4. Typical Applications
Building exteriors, curtain walls, decorative screens
Shipping containers and transport equipment
Bridges, railway vehicles, steel structures
Outdoor sculptures, landscape installations, flower boxes
Industrial components exposed to atmosphere
5. Difference from Cold Rolled Corten
Hot rolled: thicker, lower cost, structural use, natural oxide surface
Cold rolled: thinner, smoother surface, higher precision, mainly for thin parts
