Cost, manufacturing parameters, durability, and appearance are the main things that determine whether a material is a good cladding choice of not.
When doing cladding, most use steel and aluminum. Stainless steel and weathering steels are used at times. IN certain circumstances, copper, bronze, and titanium cladding are also used.
Steel and aluminum are the most popular cladding materials. There is an extensive use of steel and aluminum if all of the classifications of metal cladding. If you were to compare both steel and aluminum, their strength, durability, and cost of materials will provide you with the basic differences.
If steel cladding is used, they are normally pre-galvanized and pre-painted in coil form before panel manufacturing. The process of galvanizing steel involves dipping it is molten zinc or zinc aluminum alloy and then a layer of metallic coating is added to form a hard, durable outer layer. When the thickness of galvanized steel is measure, it is expressed as the weight of zinc or zinc aluminum per square meter on both sides of the sheet. The minimum coating weight on cladding panels is typically 275g per square meter for zinc and 255 g per square meter for zinc aluminum. IN polluted or coastal environment, the zinc aluminum alloy has better durability. It improves corrosion performance on premium pre-finished metals. The steel can then be coated with different finishes for improved appearance and durability. Your steel panel will be tough and durable with premium coating. Normally, there are difficult environmental conditions that exist outside of the sheets. But, the underside of the sheet may be subjected to condensation and trapped moisture so it is normal to apply coating to this face at various specifications to suit both cost and environmental conditions.
Aluminum is known for its corrosion resistance. When bare aluminum reacts with oxygen, it results in a hard, dense layer that prevents corrosion. Cladding aluminum is generally in the form of an allow with magnesium and manganese. For improved durability, add an organic or metal coating to aluminum.
It is difficult to compare the relative merits of steel and aluminum. It is the particular circumstances that define their merits. With aluminum cladding you resist corrosion, but with painted steel cladding, you will have something durable. Though aluminum is lighter, it is not stronger than steel so it needs deeper or thicker profiles to span the same distance between purlins.
Aluminum is actually more expensive than steel because when it is produced, greater quantities of energy is required than what is required with steel. Steel is more impact-resistant and moves less than aluminum when subject to temperature changes. It performs better in fire because it has a higher melting point. Aluminum has a low melting point which allows certain types of panels to be formed more easily than steel.