Corten grade A is a type of weathering steel plate that is commonly used in outdoor structures and applications. Here are some key properties and characteristics of Corten grade A steel: - Corten grade A is a copper-chromium-nickel alloy steel plate - It is a weathering steel that forms a protective rust patina on its surface, which helps to resist corrosion - The "A" in Corten grade A indicates that it has a yield strength of 50 ksi (345 MPa) - Corten grade A has a composition of: - Carbon: 0.12% - Manganese: 0.5-1.0% - Phosphorus: 0.07-0.15% - Sulfur: 0.05% - Copper: 0.25-0.4% - Chromium: 0.3-0.5% - Nickel: 0.1-0.2% - Corten grade A has a tensile strength of 70-90 ksi (485-620 MPa) - It has good weldability and is often used in applications such as: - Building facades - Bridges - Sculptures - Landscaping - Outdoor furniture Corten grade A steel is known for its distinctive rusty appearance, which develops over time when exposed to the elements. It is a popular choice for outdoor applications because of its durability and low maintenance requirements. If you have any specific questions or need more information, feel free to ask!