UNS 31803 Duplex Stainless Steel Pipes, ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipes, ASTM A790 UNS S31803 Duplex Seamless Pipes, ASME SA790 UNS S31803 Duplex Stainless Steel Seamless Pipes, 2205 Duplex Stainless Steel Seamless Pipes, SAF 2205 Duplex Seamless Pipes.

Manufacturing High Quality ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipes in India, Supplying Worldwide.

ASTM A790 UNS S31803 DUPLEX STAINLESS STEEL SEAMLESS PIPES (2205 / SAF 2205 )

MAH Metal Inc., we carry a full inventory of ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipe and Supply ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipe their microstructures consist of a mixture of austenite and ferrite phases.As a result, duplex stainless steels display properties characteristic of both austenitic and ferritic  stainless steels.

We Supply Duplex Stainless Steel Pipes and Tubes in Specification ASME SA / ASTM A789, A790, A928 and Grades UNS S32205, UNS S31803, UNS S32750, UNS S32760, SAF 2205, SAF 2507 etc. The grade indicates the testing methods required for a given application.

MAH Metal Inc. specializes in ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipe with years of Experience in Manufacturing ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipe. we offer high quality, lower cost but the best service. As a result to that our Duplex Stainless Steel Seamless Pipes export account today is in various countries like Iran, Iraq, Kuwait, Saudi Arabia, Oman, UAE, Singapore, Malaysia, Indonesia, South korea, Chile, Peru, Venezuela, Australia, Nigeria, Angola, Senegal, Mozambique, Algeria, Libya, Azerbaijan, Netherlands, Brazil, Norway, United Kingdom, Mexico, Canada etc.

ASTM A790 UNS S31803 DUPLEX STAINLESS STEEL SEAMLESS Pipe & TUBES MANUFACTURER, STOCKHOLDER AND SUPPLIER

Duplex stainless steels are called “duplex” because they have a two-phase microstructure consisting of grains of ferritic and austenitic stainless steel. The picture shows the yellow austenitic phase as “islands” surrounded by the blue ferritic phase. When duplex stainless steel is melted it solidifies from the liquid phase to a completely ferritic structure. As the material cools to room temperature, about half of the ferritic grains transform to austenitic grains (“islands”). The result is a microstructure of roughly 50% austenite and 50% ferrite..

Whilst duplex stainless steel are considered resistant to stress corrosion cracking, they are not as resistant to this form of attack as ferritic stainless steel. However, the corrosion resistance of the least resistant Duplex stainless steel is greater than that for the most commonly used grades of stainless steel, i.e. 304 and 316.

Duplex stainless steel are also magnetic, a property that can be used to easily differentiate them from common austenitic grades of stainless.

Duplex 2205 stainless steel (both ferritic and austenitic) is used extensively in applications that require good corrosion resistance and strength. The UNS S31803 grade stainless steel has undergone a number of modifications resulting in UNS S32205, and was endorsed in the year 1996. This grade offers higher resistance to corrosion.

At temperatures above 300°C, the brittle micro-constituents of this grade undergo precipitation, and at temperatures below -50°C the micro-constituents undergo ductile-to-brittle transition; hence this grade of stainless steel is not suitable for use at these temperatures.

SAF 2205, is a Sandvik-owned trademark for a 22Cr duplex (ferritic-austenitic) stainless steel.

ASTM A790 UNS S31803 DUPLEX STAINLESS STEEL SEAMLESS PIPES

CHEMICAL COMPOSITION OF ASTM A790 UNS S31803 DUPLEX STAINLESS STEEL SEAMLESS PIPES

Composition ranges for 2205 grade stainless steels

MECHANICAL COMPOSITION OF ASTM A790 UNS S31803 DUPLEX STAINLESS STEEL SEAMLESS PIPES

The typical mechanical properties of grade 2205 stainless steels are listed in the table below. Grade S31803 has similar mechanical properties to that of S32205. 

PHYSICAL PROPERTIES OF ASTM A790 UNS S31803 DUPLEX STAINLESS STEEL SEAMLESS PIPES

The physical properties of grade 2205 stainless steels are tabulated below. Grade S31803 has similar physical properties to that of S32205.

Grade Specification Comparison

the grade comparison for 2205 stainless steels. The values are a comparison of functionally similar materials. Exact equivalents may be obtained from the original specifications.

Possible Alternative Grades

Given below is a list of possible alternative grades, which may be chosen in place of 2205.

UNS S31803 Duplex Stainless Steel Pipe & Tubes Corrosion Resistance
Grade 2205 stainless steel exhibits excellent corrosion resistance, much higher than that of grade 316. It resists localized corrosion types like intergranular, crevice and pitting. The CPT of this type of stainless steel is around 35°C. This grade is resistant to chloride stress corrosion cracking (SCC) at temperatures of 150°C. Grade 2205 stainless steels are apt replacements to austenitic grades, especially in premature failure environments and marine environments.  

UNS S31803 Duplex Stainless Steel Pipe & Tubes Heat Resistance
The high oxidation resistance property of Grade 2205 is marred by its embrittlement above 300°C. This embrittlement can be modified by a full solution annealing treatment. This grade performs well at temperatures below 300°C.

UNS S31803 Duplex Stainless Steel Pipe & Tubes Heat Treatment
The best suited heat treatment for this grade is solution treatment (annealing), between 1020 - 1100°C, followed by rapid cooling. Grade 2205 can be work hardened but cannot be hardened by thermal methods.

UNS S31803 Duplex Stainless Steel Pipe & Tubes Welding
Most standard welding methods suit this grade, except welding without filler metals, which results in excess ferrite. AS 1554.6 pre-qualifies welding for 2205 with 2209 rods or electrodes so that the deposited metal has the right balanced duplex structure.
Adding nitrogen to the shielding gas ensures that adequate austenite is added to the structure. The heat input must be maintained at a low level, and the use of pre or post heat must be avoided. The co-efficient of thermal expansion for this grade is low; hence the distortion and stresses are lesser than that in austenite grades.

UNS S31803 Duplex Stainless Steel Pipe & Tubes Machining
The machinability of this grade is low due to its high strength. The cutting speeds are almost 20% lower than that of grade 304.

UNS S31803 Duplex Stainless Steel Pipe & Tubes Fabrication
The fabrication of this grade is also affected by its strength. Bending and forming of this grade requires equipment with larger capacity. Ductility of grade 2205 is lesser than austenitic grades; therefore, cold heading is not possible on this grade. In order to carry out cold heading operations on this grade, intermediate annealing should be carried out.

ASTM A790 UNS S31803 DUPLEX STAINLESS STEEL PIPES AND TUBES APPLICATIONS

The Duplex Stainless Steel Pipes and Tubes is used in the following applications:-

• Chemical processing, transport and storage
• Oil and gas exploration and offshore rigs
• Oil and gas refining
• Marine environments
• Pollution control equipment
• Pulp & paper manufacturing
• Chemical process plant

ASTM A790 UNS S31803 DUPLEX STAINLESS STEEL seamless Pipes SIZES AVAILABLE IN STOCK

SUPPLYING ASTM A790 UNS S31803 DUPLEX STAINLESS STEEL seamless PIPES TO COUNTRIES -

We export ASTM A790 UNS 31803 Duplex Stainless Steel Seamless Pipes to Saudi Arabia, Iran, Iraq, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen , Syria, Israel, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Mayanmar, Taiwan, Cambodia, Argentina, Bolivia, Brazil, Chile, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States Of America, Canada, Mexico, Panama, Costa Rica, Puerto Rica, Trinidad And Tobago, Jamaica, Bahamas, Denmark, Russia, Norway, Germany, France, Italy, United Kingdom, Spain, Ukraine, Netherland, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Switzerland, Slovakia, Finland, Ireland, Croatia, Slovenia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan, Equatorial Guinea, The Republic Of Congo, Gabon, Europe, Africa, Asia, North America, South America, Middle East, Far East.etc

MAH Metal Inc. is a well known worldwide Exporter of ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipes, MAH Metal Inc. is committed to provide each and every customer with the highest standard of customer service. We deals in ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipe in India and Overseas, offering a wide range of ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipes.

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