Super Duplex Flanges

what is super duplex flange?

Super Duplex Flanges are high-performance flanges made from a type of duplex stainless steel called "super duplex" that offers superior strength, corrosion resistance, and durability compared to conventional stainless steel flanges. Super duplex stainless steel is a combination of austenitic and ferritic stainless steel, with a higher content of chromium, molybdenum, and nitrogen than standard duplex stainless steel.

Super Duplex stainless steel is a type of stainless steel alloy that has a higher strength and corrosion resistance compared to standard duplex stainless steel. It is composed of a combination of austenitic and ferritic stainless steels, with a high chromium and molybdenum content.

 Composition of Super Duplex stainless steel

The most common composition of Super Duplex stainless steel is UNS S32750, also known as 2507. Its chemical composition is typically as follows:

Super Duplex stainless steel can also come in other grades, such as UNS S32760 (Zeron 100) and UNS S32550 (Ferralium 255), each with slightly different compositions to meet specific performance requirements

Specifications for Super Duplex stainless steel flanges

Super Duplex stainless steel flanges are commonly used in applications where high strength, corrosion resistance, and reliability are required. They come in a variety of specifications, depending on the application requirements. Here are some common specifications for Super Duplex stainless steel flanges:

Size range: Super Duplex stainless steel flanges are available in sizes ranging from ½ inches to 48 inches.

Pressure rating: Super Duplex stainless steel flanges are designed to handle high-pressure applications and are available in pressure ratings ranging from 150 to 2500.

Facing type: Super Duplex stainless steel flanges are available in various facing types, including raised face, flat face, and ring type joint (RTJ).

Material standard: Super Duplex stainless steel flanges are typically manufactured to meet ASTM A182 or ASME SA182 standards.

Grades: Super Duplex stainless steel flanges are available in various grades, including UNS S32750 and UNS S32760.

Types: Super Duplex stainless steel flanges are available in several types, including weld neck, slip-on, blind, threaded, lap joint, and socket weld.

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 Applications super Duplex stainless steel flanges

Super Duplex stainless steel flanges are commonly used in applications where high strength, corrosion resistance, and reliability are required. They are used in a variety of industries, including:

Oil and Gas: Super Duplex stainless steel flanges are commonly used in oil and gas applications, such as offshore platforms, subsea pipelines, and refineries, due to their excellent corrosion resistance in harsh environments.

Chemical Processing: Super Duplex stainless steel flanges are commonly used in chemical processing applications, such as chemical reactors, storage tanks, and piping systems, due to their resistance to corrosion and pitting.

Power Generation: Super Duplex stainless steel flanges are commonly used in power generation applications, such as steam turbines and boilers, due to their high strength and resistance to corrosion and erosion.

Water Treatment: Super Duplex stainless steel flanges are commonly used in water treatment applications, such as desalination plants, due to their resistance to corrosion and pitting in seawater and other corrosive environments.

Aerospace: Super Duplex stainless steel flanges are used in aerospace applications, such as aircraft engines and landing gear, due to their high strength and corrosion resistance.

Food and Beverage: Super Duplex stainless steel flanges are used in food and beverage applications, such as processing equipment and storage tanks, due to their resistance to corrosion and contamination.

Super Duplex stainless steel flanges are suitable for use in a wide range of applications due to their unique combination of properties, including high strength, corrosion resistance, and reliability.

Difference between about UNS S32750 and UNS S32760

UNS S32750 and UNS S32760 are both types of Super Duplex stainless steel, but they have some differences in their chemical composition and properties.

UNS S32750, also known as 2507, is a common grade of Super Duplex stainless steel. Its chemical composition typically includes 24-26% chromium, 6-8% nickel, 3-5% molybdenum, and 0.24-0.32% nitrogen, along with smaller amounts of other elements. This composition provides good resistance to corrosion and pitting, high strength, and good weldability.

UNS S32760, also known as Zeron 100, is a higher alloyed Super Duplex stainless steel, which means it contains more elements than UNS S32750. Its chemical composition typically includes 24-26% chromium, 6-8% nickel, 3-4% molybdenum, 0.5-1% copper, and 0.2-0.3% nitrogen, along with smaller amounts of other elements. This composition provides even higher resistance to corrosion and pitting, along with improved resistance to crevice corrosion and stress corrosion cracking.

In terms of their properties, UNS S32760 generally has better corrosion resistance than UNS S32750, especially in highly corrosive environments such as seawater and acidic environments. UNS S32760 also has better resistance to pitting and crevice corrosion, and can withstand higher temperatures and stresses.

Overall, both UNS S32750 and UNS S32760 are excellent choices for applications where high strength and corrosion resistance are required. The choice between the two depends on the specific application requirements, with UNS S32760 being preferred for applications with more severe corrosive environments.

SSM manufactures and supplies Super Duplex stainless steel flanges in various sizes and materials. We have a strong technical support team and industrial workers to ensure product quality and delivery. Please feel free to call us for inquiries about carbon steel flanges.