Duplex steel F51 plate sheet is a type of highly durable and corrosion-resistant steel, made from a combination of austenitic and ferritic steel. It is also commonly referred to as SAF 2205 or duplex 2205. This steel alloy is capable of withstanding high pressure and is a popular choice in the petrochemical and marine industries.

Duplex steel F51 plate sheet is manufactured in compliance with various international standards such as ASTM A240, ASME SA240, EN 10088-2, and EN 10028-7. These standards ensure that the material conforms to the specified chemical and physical properties required for its intended use.

The chemical composition of duplex steel F51 plate sheet is essential to its strength and corrosion resistance. The alloy contains chromium, molybdenum, nitrogen, and other elements that give it superior strength and immunity to stress corrosion cracking. The chemical composition of duplex steel F51 plate sheet is summarized below:

Chromium - 22-23%
Molybdenum - 3-3.5%
Nickel - 4.5-6.5%
Nitrogen - 0.14-0.2%
Carbon - 0.03% max
Manganese - 2% max
Silicon - 1% max
Phosphorus - 0.03% max
Sulphur - 0.02% max
 

The manufacturing process for duplex steel F51 plate sheet involves a combination of hot and cold rolling, followed by annealing and pickling. The steel undergoes heat treatment to enhance its mechanical and corrosion resistance properties. It is then cut to size and further processed to achieve the desired shape and dimensions.

Duplex steel F51 plate sheet is suitable for various applications in different industries. Examples of applications include:

Oil and Gas Industry: The steel is used to make equipment such as valves, pipes, and storage tanks in the oil and gas industry. Its high resistance to corrosion makes it ideal for use offshore.

Marine Industry: Duplex steel F51 plate sheet is ideal for use in seawater environments and is commonly used in the marine industry to make ship components, heat exchangers, and valves.

Chemical Industry: The steel's resistance to corrosion makes it ideal for use in the production of corrosive chemicals such as acids, halides, and chlorides.