Savoy Piping Inc., we carry a full inventory of ASTM A789 UNS S31803 Duplex Stainless Steel Seamless Tube and Supply ASTM A789 UNS S31803 Duplex Stainless Steel Welded Tube 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.
Savoy Piping Inc. specializes in ASTM A789 UNS S31803 Duplex Stainless Steel Welded Tube with years of Experience in Manufacturing ASTM A790 UNS S31803 Duplex Stainless Steel Tube. we offer high quality, lower cost but the best service. As a result to that our ASTM A789 UNS S32205 Duplex Stainless Steel Tubes 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 A789 UNS S31803 Duplex Stainless Steel 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 A789 UNS S31803 Duplex Stainless Steel Tubes Specification||ASTM A789, ASTM A790, ASTM A928, ASME SA789, ASME SA790, ASME SA928|
|ASTM A789 UNS S31803 Duplex Stainless Steel Tubes Grades||UNS S32205, UNS S31803, UNS S32750, UNS S32760, SAF® 2205, SAF® 2507, FERRINOX® 225, AMINOX® 225, ZERON® 100|
|ASTM A789 UNS S31803 Duplex Stainless Steel Tubes Type||Seamless / Welded / ERW / EFW / Cold Draw / Hot Finish / Cold Finish|
|ASTM A789 UNS S31803 Duplex Stainless Steel Tubes Outer Diameter Size|| Seamless - 1/2" NB TO 18" NB
Welded / ERW- 1" NB TO 16" NB
EFW - 8" NB TO 110" NB
|ASTM A789 UNS S31803 Duplex Stainless Steel Tubes Wall Thickness||Schedule 10 to Schedule 160 (3 mm to 100 mm Thickness)|
|ASTM A789 UNS S31803 Duplex Stainless Steel Tubes Length||01 Meter to 12.5 Meters, Single Random Length, Double Random Length And Customize Size.|
|ASTM A789 UNS S31803 Duplex Stainless Steel Tubes Ends||Plain Ends / Beveled Ends|
|ASTM A789 UNS S31803 Duplex Stainless Steel Tubes Delivery Conditions||As Rolled, Formed, Stress Relieved, Annealed, Hardened, Tempered, Cold Draw, Bright Annealed|
|ASTM A789 UNS S31803 Duplex Stainless Steel Tubes Coating||Electropolish, Mechanical Polish, Satin Finish, Passivated|
|ASTM A789 UNS S31803 Duplex Stainless Steel Tubes Other Testing||Product Analysis, Transverse Tension Test, Flattening Test, Etching Test, Radiograph HIC Examination, Stabilizing Heat Treatment, Intergranular Corrosion Test, Weld Decay Test, Magnetic Particle Detection, Grain Size Test, NACE 0175, Dual Grade, PWHT (POST WELD HEAT TREATMENT), Flare Test, Bend Test, Hardness Test, Tensile Test etc|
|ASTM A789 UNS S31803 Duplex Stainless Steel Tubes Dimension||All Pipes Is Manufactured and Inspected / Tested to the Relevant standards including ASTM And ASME|
|ASTM A789 UNS S31803 Duplex Stainless Steel Tubes Value Added Services||Draw / Expansion / Machining / Sand Blasting / Shot Blasting / Heat Treatment|
|ASTM A789 UNS S31803 Duplex Stainless Steel Tubes Packaging||Loose / Bundle / Wooden Pallet / Wooden box-a / Plastic Cloth Wraps / Plastic End Caps / Beveled Protector|
|ASTM A789 UNS S31803 Duplex Stainless Steel Tubes Shipment & Transportation||By Road - Truck / Train, By Sea - Break-bulk Conventional Vessel / FCL (Full Container Load) / LCL (Less Container Load) / 20 Feet Container / 40 Feet Container / 45 Feet Container / High Cube Container / Open Top Container, By Air - Freighter Civil Passenger and Cargo Planes|
|ASTM A789 UNS S31803 Duplex Stainless Steel Tubes Material Test Certificate||Manufacturer Test Certificate As Per EN10204 3.1, 3.2 / Laboratory Test Certificate From NABL Approved Lab. / Under Third Party Inspection Agency Like SGS, TUV, DNV, LLOYDS, ABS ETC
Composition ranges for 2205 grade stainless steels
|2205 (UNS S31803)||Min Max||- 0.030||- 2.00||- 1.00||- 0.030||- 0.020||21.0 - 23.0||2.5 - 3.5||4.5 - 6.5||0.08 - 0.20|
|2205 (UNS S32205)||Min Max||- 0.030||- 2.00||- 1.00||- 0.030||- 0.020||22.0 - 23.0||3.0 - 3.5||4.5 - 6.5||0.14 - 0.20|
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.
(% in 50mm) min
|Rockwell C (HR C)||Brinell (HB)|
|UNS S32205 / 2205||621||448||25||31 max||293 max|
The physical properties of grade 2205 stainless steels are tabulated below. Grade S31803 has similar physical properties to that of S32205.
|Mean Co-eff of Thermal
0-100°C ( J/kg.K)
|0-100°C||0-315°C||0-538°C||at 100°C||at 500°C|
|UNS S32205 / 2205||782||190||13.7||14.2||-||19||-||418||850|
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.
|Old British||Euronorm||Swedish SS||Japanese JIS|
|2205||S31803 / S32205||318S13||-||1.4462||X2CrNiMoN22-5-3||2377||SUS 329J3L|
Given below is a list of possible alternative grades, which may be chosen in place of 2205.
|Grade||Reasons for choosing the grade|
|904L||Better formability is needed, with similar corrosion resistance and lower strength.|
|UR52N+||High resistance to corrosion is required, e.g. resistance to higher temperature seawater.|
|6%Mo||Higher corrosion resistance is required, but with lower strength and better formability.|
|316L||The high corrosion resistance and strength of 2205 are not needed. 316L is lower cost.|
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.
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.
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.
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.
The machinability of this grade is low due to its high strength. The cutting speeds are almost 20% lower than that of grade 304.
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 A789 UNS 31803 Duplex Stainless Steel Tubes Applications
We export ASTM A789 UNS S31803 Duplex Stainless Steel Tubes 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
Savoy Piping Inc. is a well known worldwide Exporter of ASTM A789 UNS S31803 Duplex Stainless Steel Tubes, Savoy Piping Inc. is committed to provide each and every customer with the highest standard of customer service. We deals in ASTM A789 UNS S31803 Duplex Stainless Steel Tube in India and Overseas, offering a wide range of ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Tubes.