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Super Duplex steel fasteners are known for their superior strength and corrosion resistance properties, which make them ideal for applications in highly corrosive environments or where greater strength is required. Chemical composition is critical for developing these desirable characteristics and is of primary concern when selecting Super Duplex fasteners. The chemical composition of Super Duplex Stainless Steel usually consists of around 25–27% chromium, 7% nickel, 3–5% molybdenum, and other trace elements such as manganese, phosphorus, nitrogen and silicon. Apart from these major components, minor impurity elements such as copper, titanium, nitrogen and carbon have to be carefully monitored to ensure a consistent metallurgical structure with adequate corrosion resistance properties. Proper control of the chemical composition makes Super Duplex fasteners ideal for prolonged use in severest conditions without any detriment to performance.
Super Duplex Steel Fasteners are widely used in industries where strength, durability and high levels of corrosion resistance are required. These fasteners comprise chromium, molybdenum, nickel, manganese and nitrogen, which provide excellent mechanical properties and outstanding endurance against general corrosion pitting or crevice erosion. They have high tensile properties and strong tolerance against chloride-induced stress-corrosion cracking, making them ideal for industrial processes in regions with high levels of seawater content. Moreover, these fasteners also exhibit thermal stability over a wide range of temperatures due to their austenitic-ferritic microstructure. This makes them suitable for applications where resistance to excessive shock is required. Additionally, Super Duplex Steel Fasteners can be easily welded and machined, making them highly versatile across various industries.
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