S32750 S32760 Super duplex stainless steel pipes localized corrosion such as pitting and crevice attack

A789 UNS S31803 and UNS S32205 are two grades of duplex stainless steel that are widely used in various industrial applications. These Duplex S31803 Seamless Pipes are known for their excellent corrosion resistance, high strength, and good weldability. A789 is a specification that covers seamless and welded tubes made from duplex stainless steel.

It is widely used in offshore oil and gas exploration/production and in heat exchangers in petrochemical/chemical processing.

ASTM A240 Type 2205 Plate is a duplex stainless steel plate that is used extensively in various industries such as chemical processing, oil and gas exploration, and marine engineering. SA 240 GR 2205 Sheet is made from grade 2205 stainless steel, which is a combination of ferritic and austenitic steel.

Higher chromium, molybdenum and nitrogen content results in a Pitting Resistance Equivalent Number (PREN) > 40, providing superior pitting and crevice corrosion capabilities to austenitic and duplex stainless steels in virtually all corrosive media, and critical pitting temperature Above 50¡ãC .

ASTM A789 / ASME SA789 covers grades of average wall thickness, or, if specified on the order, minimum wall thickness, of stainless steel tubing for services requiring general corrosion resistance, with particular emphasis on resistance to stress corrosion cracking. These steels are suscep- tible to embrittlement if used for prolonged periods at elevated temperatures.
Type “Seamless Pipe
Seamless Tube
Welded Pipe
Welded Tube
SAW LSAW ERW EFW
Beveled End, Plain End”
Size “OD: 1/2″” ~48″”
Thickness: SCH5~SCHXXS
Length :As per your requirement.”

2205 has excellent corrosion properties, and it is well-suited to environments containing chlorides and hydrogen sulphide, for use in oil and gas extraction from sour wells, in refineries and in process solutions contaminated with chlorides.

It is listed in Material Group 2.8 according to ASME B16.5 and ASME B16.47.

2507 Super Duplex Stainless Steel was designed for demanding applications which require exceptional strength and corrosion resistance, such as chemical process, petrochemical, and seawater equipment.

Alloy 2205 duplex stainless steel is an alloy developed from the initial Super Duplex Stainless Steel. It is supplied in the solution annealed condition.

The ASTM A182 F51 flanges refer to standard or non-standard flanges manufactured in accordance with ASTM A182 Grade F51, which is designated with UNS number S31803.

Some steels also contain Mo, Cu, Nb, Ti, N and other alloy elements. Compared with ferrite, it has higher plasticity and toughness, no room temperature brittleness, significantly improved intergranular corrosion resistance and welding performance, and maintained 475 ¡æ brittleness, high thermal conductivity and Superplasticity of ferritic stainless steel. Compared with austenitic stainless steel, its yield strength is significantly improved, and its resistance to intergranular corrosion, stress corrosion, corrosion fatigue and abrasion is significantly improved.
Type “Seamless Pipe
Seamless Tube
Welded Pipe
Welded Tube
SAW LSAW ERW EFW
Beveled End, Plain End”
Size “OD: 1/2″” ~48″”
Thickness: SCH5~SCHXXS
Length :As per your requirement.”

A butt weld pipe fitting is designed to be welded on site at its end(s) to connect pipe(s) together and allow change in direction or pipe diameter, or branching or ending.

This fitting then becomes part of a system for transporting fluids (oil, gas, steam, chemicals, …) in a safe and efficient manner, over short or long distances.

The flange is second most used joining method after selding. Flanges are used when joints need dismantling. It provides flexibility for maintenance. Flange connects the pipe with various equipment and valves. Breakup flanges are added in the pipeline system if regular maintenance in required during plant operation.
A flanged joint is composed of three separate and independent although interrdlated components; the flanges, the gaskets, and the bolting; which are assembled by yet another influence, the fitter. Special controls are required in the selection and application of all there elements to attain a joint, which has acceptable leak tightness.
A flange is a protruded ridge, lip or rim, either external or internal, that serves to increase strength (as the flange of an iron beam such as an I-beam or a T-beam); for easy attachment/transfer of contact force with another object (as the flange on the end of a pipe, steam cylinder, etc., or on the lens mount of a camera); or for stabilizing and guiding the movements of a machine or its parts (as the inside flange of a rail car or tram wheel, which keep the wheels from running off the rails). The term “flange” is also used for a kind of tool used to form flanges.

The A182 Gr. F51 / S31803 material is a typical duplex stainless steel, which contains approximately 50% ferrite and 50% austenite.

The pressure ratings of the material are designated by classes 150Lbs through 2500LBs. There are different types of the duplex f51 flanges such as the raised face, ring type joint and flat face flanges.

2507 nuts are highly resistant to carbide-related intergranular corrosion due to their low carbon content (0.020% in weight).

Grade UNS S31803 is termed as a duplex class due to its mixed Austenitic-ferritic microstructure. Duplex stainless steel alloys have an equal proportion of both austenite and ferrite, which is why Duplex Steel Fittings exhibit properties prominent to both classes.

Super Duplex S32760 Bar proves to be an excellent replacement for austenitic grades in marine environments. Super Duplex S32760 round bar (ASTM A276/ ASTM A479) exhibits good heat resistance up to 300¡ã.

The pressure capacities of the flanges can also be expressed in pressure numbers. The astm a182 f53 uns s32750 flange types come in pressure numbers ranging from PN6 through PN64.

2507 has high resistance to stress corrosion cracking (especially chloride stress corrosion cracking), high energy absorption, high strength, and erosion. Essentially, and the Duplex alloys are a compromise.

2507 has Combination of properties given by austenitic and ferritic structure, and Good weldability and workability.

We manufacture and supply bar stock for machined, forged and cold formed Duplex 2205 Nuts. We can manufacture and supply Duplex 2205 nuts in imperial sizes from M2 to M150 and 1/4″ to 6″. The most commonly used nuts are heavy hex nuts, flange nuts, cap nuts, set nuts, etc. We can supply these duplex 2205 nuts with minimal lead time.

ASTM A240 UNS S32750 sheet is a type of steel known as super duplex steel.

Super duplex steel fasteners have a metallurgical microstructure consisting of a mixture of ferritic and austenitic steels in equal proportions of 50-50.

Super Duplex 2507 cannot be strengthened by heat treating. Annealing is performed at 1920¡ãF – 2060¡ãF (1049¡ãC – 1127¡ãC), followed by rapid cooling.

Type “Seamless Pipe
Seamless Tube
Welded Pipe
Welded Tube
SAW LSAW ERW EFW
Beveled End, Plain End”
Size “OD: 1/2″” ~48″”
Thickness: SCH5~SCHXXS
Length :As per your requirement.”
Material: Duplex Steel ASTM A789 S31803,S32205,S32750, S32760
ASTM A790 S31803,S32205,S32750, S32760

Pipes that are used in the conveyance of such media need to be durable on account of the stress caused by the flow. Hence, many suppliers recommend using the Duplex Stainless Steel Pipe for the qualities they offer.
Type “Seamless Pipe
Seamless Tube
Welded Pipe
Welded Tube
SAW LSAW ERW EFW
Beveled End, Plain End”
Size “OD: 1/2″” ~48″”
Thickness: SCH5~SCHXXS
Length :As per your requirement.”

UNS S32205 nuts (also known as S31803) are manufactured from high-grade duplex 2205 stainless steel. Since this material is composed of at least 22% chromium, 6% nickel and 3% molybdenum it can withstand several unique types of environmental inflexibilities that other metals cannot such as corrosion, cracking, erosion, pitting and more. Super duplex stainless steel 2205 nuts also provide twice the mechanical strength compared to standard stainless steel.

Due to the alloy’s very high mechanical strength, dual-phase fastener manufacturers can reduce the weight of their designs by thinning the cross-section of the final product, proving a cost-saving alternative to other grades of stainless steel.

Duplex stainless steel UNS S31803 Nuts are available in two phase, 5% to 6% nickel alloy steel, ferritic, 3% molybdenum, austenitic 22% chromium.

Duplex 2205 is the most widely used duplex (ferritic/austenitic) grade of stainless steel. It is used due to its excellent corrosion resistance and high strength.

UNS S32750 Flanges are used in seawater piping, desalination plants, mechanical components, high-pressure RO plants, etc. SD pipe flanges are used in heat exchangers, service and process water systems, offshore platform, oil & gas industry, etc. These flanges are also found in line pipes, power industry FGD system, industrial & utility scrubber, absorber tower, pressure vessel, etc.

A182 F51 Duplex stainless steel composed of 21% chromium, 2.5% molybdenum and 4.5% nickel-nitrogen alloy. It has high strength, good impact toughness and good overall and local stress corrosion resistance.

Duplex steel UNS S31803 round bars are known as stainless austenitic-ferritic, with equal amounts of ferrite and austenite.