Super Duplex steel is stainless steel with nickel and chromium, giving it superior corrosion resistance compared to other alloy bolts. This combination of ingredients also provides the Super Duplex steel with greater mechanical strength, making it the preferred option for demanding applications. The exact chemical composition can vary between suppliers but usually will contain approximately 25% - 27% chromium, 7% - 10% nickel, 3.5% molybdenum and 0.2 nitrogen. It can also contain trace amounts of manganese, silicon and iron to ensure the optimal strength-to-weight ratio. For these reasons, Super Duplex steel bolts are highly sought after in numerous industries, including aerospace, mechanical engineering and automotive production.
Super Duplex Steel Bolts come with a strong and durable composition that gives them superior mechanical properties compared to conventional stainless steel. As a result, they are well-suited for particularly demanding applications like pressure vessels, tankers, heat exchangers and desalination plants where exceptional strength and maximum corrosion resistance are necessary. Manufacturers in the oil and gas industries prefer Super Duplex Steel Bolts due to their superior pitting resistance, excellent weldability and excellent resistance to chloride-induced stress corrosion cracking. They can also be used in industrial chemical equipment, pumps, valves and seawater piping systems as they are non-magnetic and show significantly more excellent ductility than conventional ferritic stainless steel.
