Duplex Steel Flanges are manufactured from an alloy consisting primarily of chromium, nickel and molybdenum. Its chemical composition also includes manganese, silicon and a controlled amount of phosphorus and sulfur as alloying elements. Combining these elements yields a material with greater strength than austenitic or ferritic grades of stainless steel. It is particularly noted for its high tensile strength, a wide range of corrosive resistance, extreme toughness and good fabricability. This broad spectrum of mechanical properties makes duplex steel flanges ideal for both moderate-to-low temperature service applications as well as high-pressure and corrosive environments.
Duplex steel flanges are often used for industrial purposes due to their durability, corrosion resistance and cost-effectivity. Their combination of austenitic and ferritic stainless steel gives them superior mechanical characteristics compared to other types of stainless steel. This includes high tensile strength, fatigue strength and yield strength. The strength-to-weight ratio is an important factor in reducing maintenance costs, as it allows structures to be made with minimal material. Duplex steel flanges also have excellent corrosion performance in seawater since both elements that make up the alloy have higher corrosion resistance than 300 series alloys. Furthermore, they offer a wide range of features such as low thermal expansion, good machinability and weldability, as well as strong cryogenic properties. All these attributes make duplex steel flanges an ideal solution for various industrial applications where exceptional strength and reliability are needed
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