CORTEN

CorTen steel, also known as high-tensile and corrosion-resistant steels, is a group of alloy-doped steels developed by steel manufacturers in the United States to reduce the need for painting and to ensure that the steel structure is weatherproof with minimal maintenance. It is designed to have a solid rust-like appearance when exposed to the weather. Cor-Ten high-tensile and atmospheric corrosion resistant steels are available in a variety of types, but there are two popular types: CorTen A and CorTen B. CorTen A  และ  CorTen B

Difference between CorTen A and CorTen B Steel Grades

It lies in the chemical composition. Mechanical properties and optimal application are the main ones. The following details the key differences:

Chemical Composition:

• CorTen A consists of steel with the addition of copper, chromium, nickel, and phosphorus. This mixture provides excellent corrosion resistance and is ideal for use with gas chimneys.
• CorTen B is made up of iron that contains copper, chromium, and nickel, and a smaller amount of phosphorus. This makes it suitable for structures that are subject to vibration or impact.

Mechanical Properties:

• Yield Strength: CorTen A has higher Yield Strengths. This makes it suitable for structural applications that require high strength and high load capacity.
• Ultimate Tensile Strength: CorTen B has a slightly higher tensile strength, which means it has better tensile strength and is suitable for applications that are subject to strong winds or seismic forces.

Appearance and stains:

• Both CorTen A and CorTen B develop a rusty appearance over time, but CorTen B tends to be darker and richer in color due to its higher copper content.

Applications:

• CorTen A is often used for aesthetic purposes It is not recommended for use where the structure is subject to vibration.
• CorTen B is more suitable for load-bearing structures than it is more resistant to vibration or earthquake, and is often chosen due to its aesthetics and more uniform stains.

In conclusion, while both CorTen A and CorTen B are steels with similar corrosion resistance properties, they differ in their chemical composition, mechanical strength, and the appearance of the stains they develop. These differences make it suitable for different types of applications, with CorTen A being preferred for structures that are free of load and vibration. CorTen B section for load-bearing applications plus vibration when choosing between the two, It is important to consider the specific requirements of your job in order to choose the right grade.