Duplex Steel Flanges

We manufacture & stock high quality Duplex Steel Flanges, which are prone to precipitation of sigma phase, nitrides, and carbides, causing embrittlement and reduced corrosion resistance. The Duplex Steel Pipe Flange is a highly corrosive, high-strength steel suitable for use in highly corrosive environments.

Due to its high corrosion resistance in chloride-containing media, such as seawater, Duplex Steel Slip On Raised Face Flanges are ideal for deep-water umbilical applications and other oil and gas applications. As medium-alloy steel, Duplex Steel Blind Raised Face Flanges has superior corrosion resistance in most media compared to the standard austenitic stainless steel ASTM 316L and twice the mechanical strength.

With Duplex Steel Weld Neck Raised Face Flanges, you can increase cutting speeds, reduce tool wear, and reduce set-up times. Intermetallic phases, such as the sigma phase, form between 600°C – 1000°C in Duplex Steel Plate Raised Flanges, and ferrite decomposes between 350°C – 500°C (475°C embrittlement).

Long Weld Neck Duplex Steel Flanges are designed to produce a chemical composition that produces approximately equal amounts of ferrite and austenite. When solution-annealed, Duplex Steel Lap Joint Flanges contain approximately equal amounts of ferrite and austenite.

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