Super Duplex stainless steel S32750 1.4410 F53 hex bolt partial half thread DIN931

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 .

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.

2205 flange has good general corrosion resistance, high resistance to chloride stress corrosion cracking, as well as pitting and crevice corrosion.

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.

UNS S32750 or DIN W.Nr. 1.4410, Duplex 2507 is a super duplex stainless steel conutaining 25% chromium, 4% molybdenum and 7% nickel, designed for demanding applications requiring exceptional strength and corrosion resistance, such as chemical Process, petrochemical and seawater equipmenut.

In comparison to SS316, Duplex 2205 has been tested under reverse bending stresses at room temperature. The results show that the fatigue limit/yield strength is about twice as high for Duplex 2205.

Compared to conventional stainless steels, duplex steel pipes guarantee higher resistance to pitting and stress corrosion cracking. Meanwhile, our ASTM A 789/A 790 Duplex Steel Pipes and Tubes are available in different sizes, gauges and thicknesses according to customers’ customized requirements.

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.

Duplex¡¯s premium mechanical and chemical properties are slightly offset by its difficulty in formability.

Los tubos super duplex producidos segun la especificacion ASTM A790 se suministran en construccion sin soldadura o soldada. El proceso automatizado para fabricar tubos super duplex no utiliza metales de aporte. Los proveedores de tuberias super duplex recomiendan estas tuberias para aplicaciones propensas a la resistencia general a la corrosion.

Alloy 2205 duplex stainless steel plate has better pitting and crevice corrosion resistance than 316L or 317L austenitic stainless steel in almost all corrosive media.

This grade, with a tighter specification, is captioned as F60, equating to UNS S32205. Consequently, S32205 can be dual-certified as S31803 but not vice-versa.

Super Duplex UNS S32750 /F53 Flanges are made from a super duplex stainless steel grade that has 24% chromium, 3% molybdenum, 6% nickel and carbon, manganese, silicon, sulfur, phosphorus, nitrogen and iron in the composition.

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.

UNS S32760 (F55, 1.4501) is a high alloy super duplex stainless steel mainly used in a variety of strongly corrosive environments. S32760 has strong strength and corrosion resistance and is mainly used in chemical processing, petrochemical and subsea equipment.

Duplex is often found in desalination and pressure vessel equipment located in port cities.

The combination of high strength, corrosion resistance and moderate weldability has many benefits but also bring disadvantages and limitations. High strength is a disadvantage when forming and machining. The higher strength also means that the metal is less ductile than austenitic grades. This means that these steels are not good when the goods being produce require any degree of complex forming. It is also worth bering in mind that evemn if the item can be formed in duplex steel greater forces are required. The metallurgy of duplex stainless steels is much more complex than for austenitic or ferritic steels whith the result that they are more complex and therefore expensive to produce. Howver the lower quantity of nickel in them as compared to austenitic grades does help to keep the cost down and reduce price volatility.
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.”

Duplex steels are also magnetic, a property that can be used to easily distinguish them from ordinary austenitic stainless grades.

We are manufacturers of ASTM A182 Duplex UNS S32750 / S32760 Flanges show enhanced pitting corrosion resistance in saline environments, brackish waters, bleaching operations, and selected food processing applications.

Super Duplex Steel Pipes and Tubes are available in various dimensions, shapes like square, rectangle, and so on and enormous sizes. We are offering the standard quality of products of our customers. Our Product is offering excellent corrosion resistance and remarkable dimensional accuracy.
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.”

Duplex-grade stainless steel alloys have ferritic/austenitic properties, giving these materials superior strength and excellent resistance to oxidation.

Super Duplex UNS S32750 is the most common Super Duplex grade on the market. UNS S32750 is a duplex stainless steel designed for use in corrosive chlorine-containing environments. It has very good localized corrosion and stress corrosion cracking resistance and high mechanical strength. Widely used in oil and gas, hydropower, pressure vessels, pulp and paper, structural parts and chemical tankers.

Duplex 2205 is a (two-phase) ferritic-austenitic stainless steel with high strength and excellenut corrosion resistance, with a maximum Brinell hardness of 290 (Rc31) in the annealed condition.

Duplex 2205 bolts have a ductile to brittle transition at -50¡ãC and also become brittle at 300-1000¡ãC, so a temperature of -50¡ãC to 300¡ãC is recommended. Exposure to above 300¡ãC will not only cause embrittlement of 2205 bolts, but will also reduce corrosion resistance.

Phase stainless steel UNS S31803 fasteners exhibit the properties of austenitic and ferritic stainless steels. UNS S31803 dual phase steel fasteners have high strength, good resistance to sulfide stress corrosion and excellent impact toughness.

The steel has excellent resistance to chloride stress corrosion cracking, high thermal conductivity, and a low coefficient of thermal expansion.

2507 is a super-duplex (austenitic-ferritic) stainless steel for service in highly corrosive conditions.

Alloy 2205 gets the name Duplex because it is composed of two different types of grains. 40-50% of its grain structure is austenite and 50-60% of it is ferrite. It is closely related to, but much more popular than Alloy 255. In most environments, it surpasses 317L in crevice corrosion resistance. 2205 Duplex excels in chloride environments and resists hydrogen sulfide. 2205 Duplex has almost twice the strength of 316L. Due to the lower nickel and molybdenum content, it is less costly than Alloy C276. Among the places where 2205 Duplex is used include pressure vessels, heat exchangers and scrubbing systems.

S32750 is used for marine applications, flue gas scrubbing equipment, and pulp & paper mill equipment.

2507 (UNS S32750) is a super duplex stainless steel designed for applications requiring excellent strength and corrosion resistance.

ASME SA 479 UNS S32205 Fastener is a corrosion resistant and high strength super alloy that can be used in low temperature ranges up to 1300 degrees Fahrenheit.

Duplex 2205 bolts (EN 1.4462 ) are made of austenitic-ferritic stainless steel and are designed to provide higher strength and corrosion resistance than 300 series stainless steels. It helps users avoid stress corrosion cracking common to 316 and 317. Duplex 2205 bolts combine the stress corrosion cracking resistance and high strength of ferritic alloys with austenitic fabrication capabilities.