09CuPCrNi-A Weather Resistant Steel Plate

09CuPCrNi-A weather-resistant steel plate is a high-strength, low-alloy structural steel designed to provide excellent resistance to atmospheric corrosion. By adding elements such as copper (Cu), chromium (Cr), and nickel (Ni), the steel forms a stable, protective rust layer on its surface, which prevents further corrosion and enhances durability in outdoor environments.

This material is widely used in containers, railway vehicles, bridges, power plant chimneys, oil derricks, offshore platforms, and architectural applications. It offers outstanding weldability, formability, and toughness, making it suitable for both industrial and decorative purposes.

Compared with ordinary carbon steel, 09CuPCrNi-A provides longer service life, lower maintenance costs, and a natural weathered appearance, making it an ideal choice for modern engineering and sustainable construction projects.

Reduce the corrosion rate of 09CuPCrNi-A weather-resistant steel plate; but Cu is easy to enrich on the surface of 09CuPCrNi-A weather-resistant steel plate, hot cracks will occur during rolling, and "copper embrittlement" occurs, and adding a small amount of Ni can effectively prevent "copper embrittlement" Phenomenon.

Cr can improve the passivation ability of 09CuPCrNi-A weather-resistant steel plate, form a dense oxide film on its surface, and slow down the growth rate of rust layer. When Cu and Cr are added at the same time, the effect is particularly significant.

S not only deteriorates the atmospheric corrosion resistance of 09CuPCrNi-A weathering steel, but also may cause "hot embrittlement" damage to 09CuPCrNi-A weather-resistant steel plate, and the sulfide inclusions seriously reduce the mechanical properties of 09CuPCrNi-A weather-resistant steel plate.

P can effectively improve the atmospheric corrosion resistance of 09CuPCrNi-A weather-resistant steel plate, but if the content of P is too high, it is easy to form segregation, resulting in "cold brittle" phenomenon, which affects the welding and low-temperature impact toughness of 09CuPCrNi-A weather-resistant steel plate. The elements P and S are strictly controlled, and the ultra-low P and S content design is adopted.

►Mechnical property for 09CuPCrNi-A corten steel:
 

►Chemical composition for 09CuPCrNi-A corten steel (Heat Analysis Max%)