wholesale duplex stainless steel S31803 1.4462 Hex Nut DIN934

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 .

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.

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 UNS S31803 Hex Head Bolts Hex head and threaded bodies are available.

Super Duplex SAF 2507 is a really strong material with great corrosion resistance.

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 pressure-temperature ratings for ASTM A182 F53 flanges are the same as that for other duplex stainless steels.

Super Duplex is used in gas and oil industry, on offshore platforms, chemical processing equipment pressure vessels and boilers, in heat exchangers.

Usage of Duplex 2507 should be limited to applications below 600¡ã F (316¡ã C). Extended elevated temperature exposure can reduce both the toughness and corrosion resistance of alloy 2507.

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.

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.”

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

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.

Zeron 100 is highly resistant to corrosion in a wide range of organic and inorganic acids. The copper content gives excellent resistance to corrosion in many oxidising acids. This alloy is also highly resistant to strong alkalis.

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.

ASTM A815 specification covers two general classes, WP and CR, of wrought ferritic, ferritic/austenitic, and martensitic stainless steel fittings of seamless and welded construction. Class WP fittings are subdivided into four subclasses: Classes WP-S, WP-W, WP-WX, and WP-WU. The material for fittings shall consist of forgings, bars, plates, or seamless or welded tubular products.
Teel Industry has grown in the past few decades and there are a variety of products available in the market. ASTM A815 UNS S32750 Pipe Fittings are one of those products and are available in various sizes, shapes, and dimensions. ASTM A815 UNS S32760 Pipe Fittings are designed to be resistant to corrosion and are said to have perfect weldability. These Super Duplex S32750 Buttweld Fittings are resistant to erosion corrosion and fatigue. They have a mixed microstructure of 50% austenitic and 50% ferrite.

ASTM A815 UNS S32205 Long Radius Elbow is used in turning pipe direction and is also resistant to chloride and sulfide environments. These ASME B16.9 Duplex Stainless Steel Seamless Fittings have a higher chromium content.

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.”

The inclusion of chromium imparts good corrosion resistance to austenitic grade 304. However, increasing the chromium content to about 25%, as in the case of 2205 duplex stainless steel pipe makes the alloy resilient across several media.
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 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.

The 2205 gasket is known as a duplex stainless steel gasket because it has a combination of ferrite and austenite and can be made into fasteners due to its high corrosion resistance. It has higher corrosion resistance than 316 stainless steel and is also highly resistant to stress corrosion and chloride cracking. 2205 has been determined to be cost effective because it is only 5% nickel and is significantly less expensive than Hastelloy C276 fasteners.

Though it is important to keep in mind that pitting corrosion can be a concern in chloride solutions when oxidizing media is present. In these conditions, the passive (protective) layer of the Duplex 2205 material may be compromised in localized pitting may occur.

At temperatures above 300¡ãC, the brittle trace components of 2205 precipitate, and at temperatures below -50¡ãC, the trace components undergo a ductile-brittle transition; therefore, this grade of stainless steel is not suitable for use at these temperatures.

In the annealed condition, S31803 contains approximately 40-50% ferrite. S31803 is often referred to as the workhorse grade and is the most widely used grade in duplex stainless steel pipes. The use of S31803 stainless steel pipe should be limited to temperatures below 600¡ãF.
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 B36.64

Duplex 2205 stainless steel plate has excellent corrosion resistance, much higher than grade 316. It can withstand localized corrosion types such as intergranular, pitting and crevice.

ASTM A479 Super Duplex 2507 Hex Bolts combines high strength and good ductility with outstanding corrosion resistance qualities. The higher chromium, molybdenum and nitrogen contents in these ASME SA 479 Alloy 2507 Hex Bolts result in a Pitting Resistance Equivalent number (PREN) of >40.

Duplex stainless steel is a very useful metal that is used the world over. It gets its name from the fact that it consists of two different grades of metal. Essentially, Duplex is a Fe-Ni-Cr alloy that has a two-phase ferritic-austenitic stainless-steel microstructure when it is at room temperature.
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.”

The content of chromium, molybdenum, nickel and nitrogen in the 2205 duplex bolt alloy enhances its mechanical properties. E.g. ¨C UNS S31803 Fastener alloys contain trace amounts of carbon.

Duplex nuts S31803 also have good fatigue and corrosion resistance in most environmenutal conditions.

S32760 super duplex stainless steel is more resistant to pitting and crevice corrosion than regular austenitic or duplex stainless steels and is suitable for use in corrosive environments. This is due to higher additions of chromium, molybdenum and nitrogen.

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

Super Duplex Steel have the benefit as it counterpart ¨C it has lower alloying costs when compared with austenitic grades and ferritic.