Duplex

Duplex Stainless Steel is a highly versatile material known for its unique microstructure, combining the best properties of both austenitic and ferritic stainless steel. This powerful combination results in a material that offers high strength, superior resistance to corrosion, and excellent weldability, making it a go-to choice for a wide array of demanding industrial applications.

The term Duplex Stainless Steel is derived from the fact that this alloy is a dual-phase alloy with ferritic and austenitic phases. With the combination of two different types of stainless steel in one alloy, the unique microstructure is realized, thus making it excellent for industries requiring strength and corrosion resistance. The two most widely used Duplex Stainless Steel grades are 2205 and 2507, while the latter is known as Super Duplex material, which is because of its better resistance to corrosion.

• Chromium (19-28%): The main characteristic is its resistance to corrosion in the presence of chlorides.
• Nickel (5%): The material shows greater resistance to stress corrosion cracking. It makes the material tough as well.
• Molybdenum (5%): This enhances the material’s resistance to pitting and crevice corrosion.
• Nitrogen (0.1-0.3%): This element provides the alloy with strength and helps in preventing stress corrosion cracking.

The history of Duplex Stainless Steel dates back to the 1920s. The popularity of Duplex steels gained widespread usage only in the 1990s because advancements in steelmaking technology made it possible to accurately blend ferritic and austenitic metals into a material that is both stronger and more corrosion-resistant than its predecessors.

Austenitic steel shows unmatched resistance to corrosion cracking but has relatively low strength. On the other hand, ferritic steel alone experiences low strength and poor weldability at low temperatures. Therefore, Duplex material brings together both types of steel and delivers a material of higher strength, excellent weldability, and enhanced resistance to stress corrosion cracking.

• Strength and Toughness: Duplex Stainless Steel is much stronger than conventional austenitic or ferritic steels, with a strength level that is about twice as high.
• Enhanced Corrosion Resistance: Different types of Duplex Stainless Steel grades show outstanding corrosion resistance, particularly in environments with high chloride concentrations.
• Cost Efficiency: Duplex steel is generally less expensive than austenitic steel since it contains lower amounts of nickel and molybdenum.

The strength combined with corrosion resistance and versatility makes Duplex Stainless Steel an ideal material for a broad range of industries, such as:

Duplex steel is extensively applied in the exploration, transportation, and refining of oil and gas. This has ignited the need for having a trusted duplex pipe manufacturer to ensure safe transportation.​​

Duplex stainless steel is compatible with aggressive chemicals and high-pressure environments of the chemical industry. It is applied in reactors, heat exchangers, and piping systems where corrosion and mechanical stresses are common.

In power plants, particularly in components such as cooling pipes, heat exchangers, and turbine systems, Duplex’s high resistance to extreme conditions makes it an excellent choice for increasing the reliability and longevity of infrastructure.

Due to its high strength and excellent resistance to corrosion, Duplex steel is also applied in nuclear reactors, pollution control systems, and heavy machinery where robust materials are required for long-term operation.

Duplex Stainless Steel is highly effective in the pulp and paper industry for applications such as bleaching and paper mill systems, where both mechanical stress and corrosive chemicals are prevalent.

At Hatco, your trusted duplex pipe manufacturer, we are driven by industrial progress and obsessed with using the latest and advanced materials to meet the hardest challenges. Duplex Stainless Steel is one of our flagship offerings with unparalleled strength, excellent resistance to corrosion, and most importantly outstanding durability. These attributes make it ideal for various industries under uncertain and challenging conditions.

At Hatco, we take pride in providing this high-performance material that allows industries to operate in even the most extreme conditions. The Duplex Stainless Steel is your ticket to unlocking reliability and efficiency for your operations.