Super Duplex S32750 Flange with high resistance to crevice corrosion and stress corrosion cracking

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

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.

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 .

Compared with ferritic stainless steel and austenitic stainless steel, duplex stainless steel pipe has good welding performance. It is neither like the welding heat affected zone of ferritic stainless steel, because of the grain coarsening, the plastic toughness is greatly reduced, nor like austenitic stainless steel, it is more sensitive to welding hot cracks.

ASTM A240 UNS S32760 Plate is a super duplex stainless steel alloy for specific applications.

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

2205 Duplex nuts are the most widely used duplex stainless steel 2205 fasteners and feature a high yield strength that is twice that of standard austenitic stainless grades.

The dual phase steel / super duplex steel stainless steel pipe is a kind of stainless steel with high strength and high corrosion resistance, which has the properties of austenitic stainless steel and ferritic stainless steel. Generally, when the carbon content is low, the Cr content is 18% ~ 28%, and the Ni content is 3% ~ 10%. Some steels also contain Mo, Cu, Nb, Ti, N and other alloy elements.
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.”

This alloy is especially useful in the -50¡ãF/+600¡ãF temperature range. For applications outside this temperature range, this alloy can also be considered, but there are some restrictions, especially when used in welded structures.

ASTM A479 Duplex Steel UNS S32205 Spring Washers have excellent weldability and can be joined by most common welding methods such as metal arc welding, plasma arc welding, submerged arc welding and gas tungsten arc welding. ASME SA 479 Duplex Steel UNS S31803 Square Washer is a ferritic, austenitic 22% chromium, two phase, 3% molybdenum and 5-6% nickel alloy steel.

UNS S31803 Bolt is a threaded fastener with external threads. Generally, like screws, alloy S31803 bolts tend to use a variety of head designs.

Unlike the conventionally used austenitic 300 series stainless steels, duplex stainless steels generally have exaggerated properties. Duplex tube suppliers recommend using only this alloy as it combines both properties to produce positive results.
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.”
Manufacturing technique Hot rolling /Hot work ,Cold rolling
Producing Standard ASME B36.10 ASME B36.55

An austenitic-ferritic stainless variant with a higher stress corrosion cracking resistance in comparison to regular austenitic 304 and 316 stainless, but with a lower toughness and impact strength.

El uso de tuberias sin costura ASTM A790 UNS S32205 (sin costura y soldadas) es adecuado para aplicaciones generales, pero la solucion principal que brindan es el agrietamiento por corrosion relacionado con la tension.

2205 stainless steel sheet has high tensile stress and low thermal expansion and can be used in cargo holds, trucks and ships as sheet.

S32760 Heavy hex nuts are slightly larger and thicker than standard (finished) hex nuts. There are numerous grades and the heavy pattern is typically used for large diameter and high strength bolts.

Stainless steel round bar is a cylindrical stainless steel product, which is widely used in auto parts, aviation, aerospace hardware tools, chemical industry and other industries. Stainless steel WNR 1.4301 wire is known for its amazing tensile strength and fabric power and is available in a variety of sizes according to customer requirements. They are the product of the best materials and primary strategies that conform to the established norms of the industry. In our assortment we have round rods with special type of ends to ensure short and tight fittings in pipes.

ASTM A240 Duplex 2205 Sheets contains approximately 40-50% ferrite. Often referred to as the work horse grade 2205 is the most widely used grade in the duplex family of stainless steels.

Super Duplex 2507 has more than twice the strength of conventional austenitic stainless steels in the annealed condition.

Type: Seamless, Welded

WT: SCH5-SCH80S

Super Duplex stainless steel offers the same advantages as its Duplex counterpart. The main difference between the two is that Super Duplex has a higher chromium and molybdenum content, resulting in increased corrosion resistance.

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

For 2500# in sizes from NPS 1/2 to NPS 12 ASTM A182 UNS S32750 Flanges, with requirements in both metric and U.S. A182 S32750 Flat Flanges for companies involved in Equipment Manufacturing, Oil Refineries, Mining, Chemical manufacturing and Industrial Construction.

Duplex steels have higher toughness and better weldability. This is how alloy steel is used for industrially available pressure vessels.

The applications include high corrosive applications including acidic applications due to the material composition.

Duplex 2205 is a chromium molybdenum blend which combines properties of both ferritic and austenitic steels.

Duplex stainless steels are considered resistant to stress corrosion cracking because they are not as resistant to this form of corrosion as ferritic stainless steels.

The chemistry of this steel ensures better performance with higher mechanical properties in comparison to austenitic stainless steel pipes.

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.

2205 duplex stainless steel is more than double that of ordinary austenitic stainless steel. This characteristic allows designers to reduce weight when designing products, giving this alloy a price advantage over 316,317L.

Duplex 2205 stainless steel round bars (ASTM A276/ ASTM A479) exhibit good heat resistance up to 300¡ã. SS Rod can be easily welded by most standard methods, the only mandatory requirement is the use of filler metal. Due to its high strength, machinability is low.

Another advantage of grade 304 stainless steel bar over grade 303 is that it is slightly harder and has better corrosion resistance. Because of this, grade 304 stainless steel bar is used in large quantities in the manufacture of fasteners and fixtures such as nuts, bolts, washers, clips, fittings and clamps. Products made from grade 304 stainless steel in the fastener industry are often referred to as “A2”.

Super Duplex stainless for e.g. alloy UNS S32750, has a mixed microstructure of both austenite as well as ferrite in an equal or 50/50 ratio.

If the 22cr Duplex Pipe is to be welded, no filler metal is required to be added to the alloy during its welding process.