Super Duplex Steel Pipe and Tube is an excellent corrosion-resistant material. It is commonly used in oil refinery heat exchangers, seawater applications, and chemical processing equipment. Super Duplex Steel Pipes are also used in deep water offshore oil drilling. These applications are highly corrosion-resistant and offer better resistance to stress corrosion cracking.
Super Duplex Steel Tubes are known for their high strength, high resistance to stress corrosion, good weldability, and excellent fatigue strength. These pipes are also available in seamless and welded variants. The welded variant is less expensive and mechanically strong.
Super duplex alloys are usually composed of around 25% chromium. Higher chromium content indicates superior resistance to pitting corrosion. As the chromium content increases, the Pitting Resistance Equivalent Number (PREN) rises.
Unlike other types of stainless steel, duplex stainless steels have a double microstructure. This dual microstructure provides users with an unprecedented combination of mechanical properties.
Compared to austenitic SS, duplex stainless steel are highly corrosion-resistant and has improved strength. This is because duplex steel has a 50-50 concentration of nickel and chromium.
Duplex steel pipes result from an alloying process that combines austenitic and ferritic stainless steel materials. This combination produces a high-strength pipe with good corrosion resistance. It is particularly well suited to applications in the tropical marine environment, such as hydraulic applications and instrumentation.
Duplex stainless steel is less expensive than its ferritic counterparts, although it is still more costly than austenitic types. This makes it more desirable in demanding environments like offshore oil drilling.
Super Duplex pipes and tubes are highly resistant to stress corrosion cracking. In addition to this, they are resistant to pitting corrosion. Their low carbon content and alloying additions help keep their microstructure balanced.
The alloying elements used in duplex stainless steel make them more robust and affordable. These include nickel, molybdenum, and chromium. They can provide excellent resistance to pitting, crevice, and coercive corrosion when added together.
|Specifications||ASTM A790 / ASME SA790, ASTM A789 / ASME SA A789|
|Dimensions||ASTM, ASME and API.|
|Seamless Pipes & Tubes Sizes||1 / 2" NB - 8" NB|
|Welded Pipes & Tubes Sizes||6" NB - 24" NB|
|Thickness||0.3mm – 50 mm|
|Schedule||SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS|
|Type||Seamless / ERW / Welded / Fabricated / CDW Pipes|
|Length||Single Random, Double Random & Cut Length.|
|End||Plain End, Beveled End, Treaded|
|Form||Round, Square, Rectangular, Hydraulic Etc.|
|Super Duplex 2507||1.4410||S32750 / S32760 / S32950|
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