Duplex steel foil can be defined as a thin plate of austenitic-ferritic stainless steel and is usually thin and flat. This material is prevalently utilized in chemical processing, marine engineering, petrochemical, and other industries requiring extra environmental resistance.
Characteristics Of Duplex Steel Foil
Duplex steel foil is a kind of stainless steel foil whose material has the characteristics of Austenitic and Ferritic stainless steel.
- High Strength: Duplex steel foil is stronger than normal stainless steel and thus can be used in applications with high mechanical properties and strength.
- Excellent Corrosion Resistance: This particular alloy has a very low corrosiveness, especially in any environment that is likely to come with various types of chloride; this includes chemical processing and marine applications.
- Good Fatigue Resistance: Duplex steel foil has better fatigue properties than other materials, making it more durable for usage when there is cyclic loading or repeated stress.
- Cost-Effective: In those circumstances, the cost of duplex steel foil materials usually differs from that of some high-alloy stainless steels; however, they are often more effective and resistant.
- High Impact Toughness: This is important when trying to protect an element from impact and sudden stress, which would, otherwise, cause the material to crack or deform, hence the ability to meet high-stress requirements.
- Improved Weldability: Welding procedures may be effectively applied to join the structure of the duplex steel foil, which brings flexibility to manufacturing and assembly processes, especially in structures with higher complexity.
- Resistance to Stress Corrosion Cracking: CF8M duplex steel foil does not corrode corrosion cracking, which is very important when operating in tensile and corrosive areas.
- Thermal Resistance: It has good mechanical properties at different temperatures, such as high or low.
Hence, Duplex steel foil has various merits, including high strength, immense resistance to corrosion and moderate fatigue strength.
Applications Of Duplex Steel Foil
Duplex steel foil that combines the properties of austenitic and ferritic stainless steel is used in various highly-stressed applications.
- Chemical Processing: Duplex steel foil is widely used in chemical processing industries where equipment such as reactors, heat exchangers, pipes, etc, cannot afford to be eroded by the chemicals to be processed nor weakened by loads.
- Marine Engineering: Duplex steel foil is used in marine structure industries to make the parts exposed to seawater, such as hulls of ships, ballast tanks and the structures of offshore platforms, because of its ability to resist chloride-induced corrosion effectively.
- Oil and Gas Industry: It is utilized in the oil and gas industry for pressure vessels, separators, and pipelines; because of its high strength and resistance to stress corrosion cracking, it is suitable for extreme conditions.
- Heat Exchangers: Duplex steel foil is used in heat exchangers, and its thermal conductivity and corrosion conductively promote the performance and durability of heat exchangers for effective heat transfer in severe conditions.
- Pulp and Paper Industry: In the pulp and paper industry, Sky has manufactured and supplied products, including the duplex steel foil that is particularly useful in digesters and bleach plants since their working substances are aggressive chemicals that also work at high temperatures.
- Aerospace: The foil’s high strength-to-weight ratio and high-temperature stability make it best for aerospace structures such as structural parts and heat shields, which need high performance but are also too heavy.
- Desalination Plants: It is used in the desalination plant for parts such as the evaporators and the condensers since it does not rust when exposed to saltwater and can withstand high temperatures.
- Architectural Applications: Architects use duplex steel foil in several architectural designs, both aesthetic and practical, including decorations and support systems in constructing outer structures of buildings.
Hence, the use of Duplex steel foil, which gives high strength, corrosion, and durability, makes it the best option for use in many areas of highly challenging operations.