Hyper Duplex

Developed specifically for chemical, oil & gas, deep water umbilical and deep water umbilical applications, hyper duplex grades meet the increasing demands of the chemical industry. Due to its corrosion resistance, such as pitting and crevice corrosion), and its high mechanical strength and tensile strength. Among the other properties of UNS S32707 2707 Hyper Duplex, there is its resistance to stress cracking caused by chlorine and sulphur, erosion corrosion, resistance to corrosion in acidic and alkaline environments, and its ability to weld well. They are therefore used as equipment in many industries, such as control lines, raw seawater injection lines, and chemical injection lines.

In order to reduce the gauging of the final product (lighter installations are the result), the Hyper-Duplex Stainless Steel's increased tensile strength could be used, thus proving to be an economically viable option without losing any of its corrosion resistance and strength. The Hyper-Duplex Stainless Steel Grade 2707 provides greater corrosion resistance, yield strength, and fatigue performance than other super duplex stainless steels. In the oil and gas industry, they are therefore used.

A Duplex stainless steel consists of two phases: ferrite and austenite in approximately equal amounts. As a result, they are both stronger, easier to weld, more tough and resistant to corrosion than austenitic stainless steels. Due to their lower nickel content, they are also more economically competitive than austenitic stainless steels. 

Although duplex stainless steel was developed in Sweden in 1930, commercial production did not begin until the 1970s, due to its very complicated manufacturing process. Modern steelmaking techniques have made it easier to produce, resulting in a re-emergence of the metal. Although these stainless steels have significant advantages, they are still a relatively underutilized group, with about 1 - 3% of stainless steels being used globally due to their limitations.

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