ASTM A182 S32205 Flange

The A182 F51 material has carbon, 2% manganese, phosphorus, sulfur, 1% silicon, chromium, 4.5% nickel, 2.5% molybdenum and nitrogen it.

Due to the material composition, the strength and the corrosion resistance, these flanges are used in a variety of applications.

The applications of the flanges include petroleum, petrochemical, oil and gas and other high performing piping systems.

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.

The yield strength of duplex stainless steel is twice that of austenitic stainless steel. This feature allows designers to reduce weight when designing products, making this alloy more cost-effective than 316, 317L.

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.

Duplex Steel DIN 1.4462 Socket Weld Flanges demonstrate good fatigue strength, as well as outstanding resistance to stress corrosion cracking, crevice, pitting, erosion, and general corrosion in severe environments. As a referred stockholder we have huge inventory of Duplex Steel ASTM A182 Flanges include Duplex Steel S31803 Weld Neck Flanges

Duplex stainless steel flanges are widely used in pipeline systems, risers, manifolds, etc. in the offshore gas and oil industries, and also in the petrochemical industry in the form of pressure vessels and pipelines. Duplex 2205 flange material has good strength and high resistance to corrosion, pitting and crevice corrosion. The nominal chemical composition of Duplex 2205 is 22% chromium, 3.2% molybdenum, 5% nickel and other alloying elements such as manganese and nitrogen.

Sizes range from ?” to 48″. Pressure ratings range from 150 psi to 2500 psi and more. There are also different types of flanges for different applications. ASME SA182 F51 RTJ flanges have two rings as two halves that are joined at the joint by welding.

Flanges also have different faces such as raised face, flat face and ring joint. Flange applications are found in aerospace, nuclear engineering and chemical industry applications. Duplex stainless steel butt weld flanges have a weld neck for extra grip before and after welding.

Pipe flanges are widely used as a popular category of pipe fittings. Flanges are used to mechanically connect two pipes together. It can also be used to mechanically connect pipes to tees, valves, chokes or any other device. Flanges are available in round, square and rectangular. In some cases, flanges are usually ring-shaped or plate-shaped to form a rim at the end of the pipe when fastened to the pipe.

Austenitic-ferritic stainless steel variants have higher resistance to stress corrosion cracking, but lower toughness and impact strength than ordinary austenitic 304 and 316 stainless steels. Such materials include grades 2205, F51, F53 and F60. Duplex stainless steels have grown in popularity over the years due to their excellent chemical and mechanical properties, and compared to basic stainless steels, especially given the increased availability, the cost difference is now small.

The granular structure of the duplex is a ferrite-austenite hybrid material with a higher strength-to-weight ratio than 304 or 316. It balances the weldability of austenite with pure ferrite and maintains good mechanical toughness in applications exposed to cooler ambient temperatures. Offshore/seawater applications are common uses of this type of steel due to its excellent stress corrosion cracking properties. Therefore, duplexes are often found in desalination and pressure vessel plants located in port cities.

Duplex’s superior mechanical and chemical properties are offset by its formability difficulties. These grades are great for simple flanged connections for fixed services, but are less effective when forming complex metal shapes. Fortunately, machinability of dual-phase steels in complex and circular structures is not an issue in structural steels, given the widespread preference for simple mild steels in non-corrosive applications.

ASTM A182 specification covers stainless steel alloys produced by forging or rolling. This Duplex 2205 specification also covers components for high temperature service such as pipe flanges, forged fittings, valves and parts. After hot working, forged stainless steel grade 2205 duplex flanges must be cooled to a specific temperature before heat treating. Alloys must be heat treated according to certain requirements, such as heat treatment type, cooling medium, austenitizing/solution temperature, and quenching.

Materials according to ASTM A182 need to meet the required chemical composition. For example, dual phase steel 2205 butt weld flanges must contain elements such as carbon, silicon, nickel, chromium, molybdenum, manganese, phosphorus, columbium and titanium. The material used to produce this Alloy 2205 flange must meet the mechanical performance requirements of the grade specification ordered.

The base body of the DIN 1.4462 flange has both a ferritic and austenitic structure. The duality of their microstructure changes not only the mechanical properties but also their corrosion resistance properties. The chemical composition of UNS S31803 Socket Weld Flanges consists of 22% chromium, 3% molybdenum, and 5% to 6% nickel.

Due to its high content in this alloyed stainless steel, this grade is also known as 22 Cr duplex steel. Duplex Stainless Steel 2205 Flange SORF is the most widely used category of stainless steel grades. A typical feature of 22 Cr duplex steel plate flanges is high yield strength. In fact, the tensile strength of this special grade is often double or twice that of standard austenitic stainless grades.

In addition, 2205 stainless steel flanges exhibit good fatigue strength and excellent resistance to chloride-related stress corrosion cracking. Additional properties of Duplex 2205 flanges include excellent resistance to crevice corrosion, pitting corrosion, erosion corrosion and general corrosion even in harsh environments.

Duplex 2205 Flat Face Flange Manufacturers recommend this stainless steel grade for industrial applications such as chemical processing, transportation and storage – pressure vessels, tanks, pipes and heat exchangers, sewage scrubbing systems, cargo holds of ships and trucks, petroleum and natural gas exploration and processing equipment – pipelines, pipes and heat exchangers.

Other applications for 2205 flanges include use in marine and other high chloride environments, biofuel plants, pulp and paper industry – digesters, bleaching equipment, stock handling systems, and food processing equipment. Major industries using these Duplex 2205 flanges include asphalt upgrading plants, nuclear power (mostly seamless), heavy oil refineries, and petrochemicals and acids.

The range of Duplex Steel 2205 Orifice Plate Flanges covers all standard materials, sizes, grades and specifications. These duplex steel SAF 2205 flanges are widely used in various application industries such as oil and gas industry, chemical industry, engineering, etc. Ferrous and Nonferrous Metals is committed to providing our customers with consistent and reliable service that meets their needs and promotes continuous improvement of superior systems and quality.

Duplex steel flanges are made of duplex steel material and belong to the stainless steel family. It is designed to provide better corrosion resistance, especially chloride stress corrosion and pitting corrosion, and higher strength than standard austenitic stainless steels such as stainless steel 304 or stainless steel 316.

Molybdenum increases resistance to pitting and crevice corrosion. However, its content in duplex stainless steels is generally limited to less than 4% because Mo is also a ferrite former and can lead to unwanted intermetallic phases. Nitrogen improves resistance to pitting and crevice corrosion.

The chemical composition of Duplex F51 flanges contains carbon, chromium, manganese, molybdenum, nitrogen, nickel and phosphorus. Flanges are used in pressure systems and valve fittings.

It also greatly increases the strength as the most effective solid solution strengthening element. Nitrogen is a strong austenite former, and the addition of nitrogen greatly improves the toughness of dual-phase steels. It also delays the formation of intermetallic compounds enough to allow processing and fabrication of dual-phase steels. Nickel is an austenitic stabilizer that promotes the formation of the austenitic FCC structure, which contributes to the toughness of dual-phase steels.

For duplex stainless steel flanges, solution annealing at an appropriate temperature followed by immediate water quenching can achieve the best metallurgical austenite-ferrite phase balance. It is important to keep the time between leaving the furnace and water quenching as short as possible. This is to minimize heat loss from the flange, which can lead to precipitation of detrimental phases before water quenching to room temperature.

Duplex steels were introduced to the market as a means to address the problems associated with stress-related corrosion cracking caused by chlorine solutions. The chemical composition of the duplex flange material also makes flanges less prone to chlorine-induced pitting corrosion. These alloys are less expensive than nickel-based steels.

Since nickel is a commodity material, the cost of using alloys that have been heavily alloyed using alloys tends to be very expensive. Despite the low nickel content, Duplex 2205 flanges manage to exhibit several important properties due to the high content of molybdenum and chromium.

The chromium content is between 20-28%, which is why UNS S31803/ S32205 blind flanges undergo a phenomenon called passivation. In this phenomenon, a self-healing protective passivating oxide layer surrounds the flange making it resistant to oxidation.