Understanding A588 Grade A Weathering Steel

A588 Grade A weathering steel is a highly corrosion resistant structural steel. This steel was created to provide a steel that is more corrosion resistant than traditional grades, which is important in areas where weathering is an issue. This steel is also known as Cor-Ten steel, which is short for corrosion-resistant steel.

A588 Grade A weathering steel is formed when small amounts of chromium, copper, nickel, and phosphorus are added to ordinary steel. This creates a chemical reaction forming a durable oxide layer on the steel surface. By doing this, the weathering steel is able to withstand corrosion, even when exposed to extremely corrosive environments. This characteristic provides benefit in applications such as bridges, structures, buildings and other outdoor structures that may be exposed to inclement weather conditions.

A588 Grade A weathering steel is also referred to as a “weathering steel alloy” because of its ability to form a protective layer on its surface. This layer helps protect the underlying steel from oxidation and corrosion. The protective layer is formed when the weathering steel is exposed to the environment and oxygen and moisture combine to create an Oxide layer. This layer helps to protect the underlying steel from the deterioration caused by the elements.

The A588 Grade A weathering steel has a 50 ksi minimal yield strength. This is the point at which the steel will begin to deform and stretch rather than break. This allows the steel to provide superior protection from the elements than traditional steel. This characteristic proves beneficial in applications such as buildings and other structures where strength is necessary.

In terms of weldability, A588 Grade A weathering steel is one of the few forms of steel that can still be successfully welded once the protective layer has already been formed. This makes it an ideal choice for those structures that require strength, but also require corrosion protection.

One of the major drawbacks of A588 Grade A weathering steel is that the protective layer will not completely prevent the formation of rust. In order to maintain its protective properties to the greatest degree possible, it is important to paint the surface of the steel structure with a quality staining coat. This helps to protect the structure from further damage that may be caused by rust and other forms of corrosion.

A588 Grade A weathering steel is ideal for those areas that may experience severe weather conditions and corrosive atmospheres. This form of steel is useful for its high corrosion resistance, weldability, and extremely low yield strength. However, to preserve its protective properties, it is important to protect it from rust and corrosion with a quality stain coat.