Galvanized Sheet Metal Vs Aluminum

This is due in part to the fact that the steel is coated in a thin layer of zinc to prevent rusting.

Galvanized sheet metal vs aluminum.

The price of steel and aluminum is continually fluctuating based on global supply and demand fuel costs and the price and availability of iron and bauxite ore. Aluminum is a silvery white soft nonmagnetic ductile metal. Architectural roofing does not require structural integrity in the construction assembly. Stainless is considered 100 year compatible but is very expensive and relatively difficult to fabricate in the field.

When working with sheet metal it is common for the term gauge to be used someone unfamiliar with the gauge system may not understand what is meant by 18 gauge steel for example. Galvanized steel is expected to last about 15 to 20 years but aluminum should last over 20 years in the right environment cons aluminium is durable but it has a tendency to dent if hit by ladders tree limbs ice or hail. Steel can be used for structural roofing and architectural roofing. Aluminum is primarily used for architectural roofing.

Aluminum vs steel cost. However steel is generally cheaper per pound than aluminum see galvanized vs stainless for more info on steel. Galvanized steel has better corrosion resistance. The upper limit of the operating temperature of aluminum is 85 c.

This is due in part to the fact that the steel is coated in a thin layer of zinc to prevent rusting. The aluminum is added to improve the adhesion between the coating and the steel substrate during formation. Aluminium should last longer than galvanized steel. Smacna s manual lists the pros and cons of a range of flashing materials including stainless steel copper lead aluminum and galvanized steel.

Galvanized and galvalume steel roofing. There are many aluminum understructures with galvanized steel exteriors built over the past half century. Steel has higher strength at high temperatures which is important in case of fire and aluminum dramatically reduces strength at t 200 c. Cost and price are always an essential factor to consider when making any product.

The question is frequently asked when two dissimilar metals are placed in contact with each other. What happens when i put galvanized steel together with aluminum parts or put aluminum sheets on galvanized steel studs. This is achieved through a multi step process where a steel sheet is immersed in pure molten zinc at a very high temperature bonding the zinc to the steel. At the same thickness steel is 2 5 3 0 times stronger.

However aluminum resists it slightly better than galvanized steel. Galvanized steel has a porous and rough surface which is difficult to clean. Galvanized steel is essentially pure zinc with a very small percentage of aluminum. The chart below shows the electrode potentials of metals in seawater.