- Dakahlia - Mit Ghamr - Elbar Eltani
Steel sheets are the backbone of various industries, ranging from construction and infrastructure to automotive and home appliances. Choosing the right type depends on the project's nature and environmental conditions.
The properties of steel change based on how it is thermally and chemically processed:
A- Hot Rolled Steel (HR)
Produced at very high temperatures (above the recrystallization temperature).
Appearance: Features a rough surface and a bluish-black finish.
Advantages: Highly formable, cost-effective, and ideal for projects where precise dimensions are not the top priority.
Applications: Railroad tracks, structural frames, and gas pipelines.
B- Cold Rolled Steel (CR)
This is hot-rolled steel that has undergone further processing at room temperature to achieve precise dimensions.
Appearance: Smooth, shiny surface with sharp, well-defined edges.
Advantages: High tensile strength, thickness precision, and superior aesthetic appeal.
Applications: Electrical appliances (fridges, washing machines), metal furniture, and automotive parts.
To protect steel from its primary enemy—rust—it is coated with protective layers:
C- Galvanized Steel
The steel is dipped in a molten zinc bath to create a protective barrier.
Advantages: Excellent resistance to corrosion and rust, long lifespan, and low maintenance costs.
Applications: HVAC ducting, water tanks, and fencing.
D- Pre-painted Steel (Color Coated)
Typically galvanized steel that is coated with a layer of polyester or paint in various colors.
Advantages: Combines rust protection with aesthetic appeal; requires no additional painting after installation.
Applications: Hangar cladding, warehouse roofing, and advertising billboards.
E- Corrugated Sheets
These are usually "waved" or profiled to increase structural rigidity.
Advantages: Lightweight yet exceptionally strong in supporting weight and resisting wind.
Applications: Factory roofing and structural wall cladding.