hex bolt DIN931 933 S31803 1.4462 bolt

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 .

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

2205 helps users to avoid stress corrosion cracking that is typically seen with 316 and 317.

Some of the advantages of using super duplex fasteners include its physical and excellent mechanical properties such as high yield strength, excellent tensile strength, high impact strength and excellent corrosion resistance.

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

Also known as standard duplex stainless steel, these 2205 duplex bolts are one of the most widely used stainless steel grades.

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.

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.

Inhibiting deformation and cracking at high temperatures, the dual phase steel S31803 / S32205 reducer is superior to common steel parts in the chemical industry that are susceptible to chloride stress corrosion cracking. With flue gas desulfurization machinery. Tees such as ASME A182 Duplex Steel S31803/S32205 are known to have good resistance to high toxicity and elasticity.

ASTM A789 A789M Covers Grades of nominal wall thickness, stainless steel tubing for services requiring general corrosion resistance, with particular emphasis on resistance to stress corrosion cracking. These steels are susceptible 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.”

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.

As well as greater tensile and yield strength whilst still providing good ductility and resistance to stress corrosion cracking.

The ductility and corrosion resistance of duplex steel fasteners are reminiscent of their austenitic microstructure. On the other hand, the toughness and hardness of these fasteners are inherited from the ferritic region.

The strength, factorially speaking of an ASTM A790 UNS S31803 Seamless Pipe, is two times higher than that of either of the two stainless steel classes. And the toughness and ductility of the Sa 790 UNS S32205 Welded Pipe are better in comparison to ferritic steels.

The high chromium, molybdenum and nitrogen content of 2205 provides better corrosion resistance than common stainless steels such as 316L and 317L in most environments.
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 B36.54

Thread friction between the nut and bolt creates a strong, steady and even force holding the componenuts together. The most commonly used ASTM A182 UNS S32205 fastener nuts are regular hex nuts. At the same time, duplex stainless steel fasteners are strong and corrosion resistanut, combining the healthy properties of ferrite and austenite. The material also has a 90ksi minimum tensile strength and a 65ksi minimum yield strength. 2205 duplex stainless steel bolts have an elongation of 25% and a hardness of 217HBW.

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.

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.

Some steels also contain the alloy elements such as Mo, Cu, Nb, Ti and N, etc. Compared with ferritic stainless, duplex stainless steel has higher plasticity, ductility and better intergranular corrosion resistance and weldability.
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 stainless steel sheet has high tensile stress and low thermal expansion and can be used in cargo holds, trucks and ships as sheet.

In order to convey the pipeline, it is necessary to remove the straight hose in the pipeline. When using various pipelines, various pipelines must be used. When the pipeline is used, the elbow must be used to change the size of the pipeline. When bifurcating, the three-way pipe The flange connection used when the joint is used with various pipe joints, in order to reach the long-distance transmission pipeline, in order to reach the thermal expansion and cold contraction joint or effective connection aging of the pipeline, the long-distance expansion and cold contraction joint is used for the connection of the pipeline. , In the connection of various instruments, there are also the connectors and plugs of the instrument phase.

Seamless pipe is not as strong as Duplex SS 2205 welded pipe, but is very dimensionally accurate. Dimensional accuracy is useful in highly sensitive applications where measurement and calculation accuracy is required.
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 B36.40

La tuberia soldada ASTM A790 UNS S32205 se fabrica para obtener una resistencia adicional. Los tubos soldados se laminan en caliente, mientras que los tubos sin costura se estiran en frio.Ambos pueden reforzarse aun mas mediante el trabajo en frio, pero hasta cierto punto.

Duplex2507 thread rod are dual phase austentic-ferritic duplex fasteners manufactured from alloy containing chromium, nickel and molybdenum with restricted carbon content and minimum PREN42. SAF2507 thread rod have high strength, resistance to pitting, stress corrosioni cracking, erosion and corrosion fatigue, crevice corrosion resistance.

The duplex material contains bot the austenitic and ferrite structures in the metallurgy of the material. These properties bring the material the best of both ferritic and austenitic steel types. The pipes could be hot rolled or cold drawn. The hot rolled ones are stronger and the cold drawn ones are seamless and accurate in dimensions. The Duplex Seamless Pipe is used in applications with high precision requirements.
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.”

Super Duplex Steel 1.4410 Flanges are having low alloying costs as compared to the similar ferritic and austenitic grade along with resistant to corrosion in the chloride-containing atmosphere because of well-enhanced yielding and tensile strength.

We offer a complete range of 2205 Duplex Steel Fasteners such as Bolts, Nuts, Washers, Screws, Connecting Rods and Duplex Steel Screws. We also offer super duplex fasteners in different sizes, shapes, features and thicknesses according to customer requirements.

2507 (PREN 40-45), with 25-26 Cr and increased Mo and N compared with the 25Cr grades. A super austenitic-ferritic duplex stainless steel with exceptional strength and corrosion resistance ideal for chemical process, petrochemical, and seawater applications.
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.”

Las laminas duplex son grados austenitico-ferriticos con la misma composicion. Esta dise?ado para proporcionar laminas resistentes a la corrosion y de alta resistencia. Utiliza un mayor contenido de cromo hasta un 28%. La placa ASTM A240 UNS S32750 tiene un limite elastico minimo de aproximadamente 77 ksi y una resistencia a la traccion de al menos 730 MPa. Se estiro un 25% en estado recocido.

2205 is the most widely used duplex (ferritic/austenitic) stainless steel grade. It finds applications due to both excellent corrosion resistance and high strength.
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.”

Another reason for the good mechanical properties of duplex stainless steel fasteners can be attributed to the mixed but balanced austenitic and ferritic microstructure present in the alloy.

Duplex stainless steel pipes and fittings are generally less expensive because of the lower proportions of alloying elements used in the manufacture of duplex stainless steels. Compared to austenitic stainless steels, duplex stainless steels have higher yield strengths, so users can buy duplex pipes and duplex pipe fittings in relatively lower thicknesses.