1. Production Process
Hot Rolled Corten PlateHeated to above 1200°C (recrystallization temperature) and rolled into sheets, then air-cooled. No further cold processing after rolling.
Cold Rolled Corten PlateMade from pickled hot-rolled Corten as raw material, rolled at room temperature with multiple passes, followed by annealing, leveling, and finishing.
2. Surface Appearance
Hot Rolled CortenDark, rough surface with black iron oxide scale; uneven texture; natural industrial look.
Cold Rolled CortenSmooth, bright, clean metallic surface; high flatness; no oxide scale; precise finish.
3. Dimensional Accuracy & Thickness
Hot Rolled CortenThickness generally ≥ 1.5 mm up to 100 mm+; lower dimensional precision; thicker tolerance.
Cold Rolled CortenThickness usually 0.3–3.0 mm; very high precision; tight thickness tolerance; extremely flat.
4. Mechanical Properties
Hot Rolled CortenHigher strength, better toughness, lower internal stress; suitable for load-bearing structures.
Cold Rolled CortenHigher hardness and stiffness due to work hardening; less ductile; better for stamping and thin parts.
5. Corrosion & Patina Performance
Hot Rolled CortenForms patina naturally after oxide scale falls off; stable and uniform rust layer.
Cold Rolled CortenStarts rusting faster and more uniformly due to clean surface; patina develops evenly but more quickly.
6. Cost & Availability
Hot Rolled CortenLower cost; widely available in large sizes; most commonly used.
Cold Rolled CortenHigher cost; thinner specifications only; less commonly produced.
7. Typical Applications
Hot Rolled Corten PlateBridges, containers, building facades, landscape boxes, outdoor sculptures, structural parts.
Cold Rolled Corten PlatePrecision parts, thin decorative panels, small metal components, home appliances, precision fabrication.
