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. It also includes stainless steel and weathering steels. Copper, bronze, and titanium are used for cladding in particular circumstances.
Steel and aluminum are the most popular cladding materials. In the classifications of metal cladding types, these two are extensively used. If you were to compare both steel and aluminum, their strength, durability, and cost of materials will provide you with the basic differences.
Before panel manufacturing steel cladding, they are first pre-galvanized and pre-painted in coil form. When steel is galvanized it produces a hard, durable outer layer since it is first dipped in molten zinc or zinc aluminum alloy, then bonded with metallic coating. There are various thicknesses and it is usually expressed as the weight of zinc or zinc aluminum per square meter on both sides of the sheet. 275g/m2 and 255g/m2 are the coating weights for zinc and zinc aluminum coating, respectively. IN polluted or coastal environment, the zinc aluminum alloy has better durability. Premium pre-finished metals improves its corrosion performance with the use of zinc aluminum alloy. Then, the steel is coated with a variety of finishes for improved appearance and durability. Your steel panel will be tough and durable with premium coating. Outside of the sheet they may be difficult environmental conditions that exist. 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. Aluminum used for cladding is an alloy that is combined with magnesium and manganese. For improved durability, add an organic or metal coating to aluminum.
The relative merits of both steel and aluminum is difficult to compare. 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. While aluminum is lighter, steel is stronger so profiles have to be deeper or thicker to span the same distances between purlins.
Because of the greater amount of energy it requires to produce aluminum compared to steel, it make it more expensive. When there are temperature changes steel is more resistant to impact and moves less than aluminum. It performs better in fire because it has a higher melting point. There are certain types of aluminum panels that can be formed more easily than steel due to its low melting point.