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ASTM A790 UNS S32205 DUPLEX STAINLESS STEEL SEAMLESS PIPES

Duplex stainless steels are called “duplex” because they have a two-phase microstructure consisting of grains of ferritic and austenitic stainless steel.

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

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.

Savoy Piping 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.

Savoy Piping 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.

 Duplex Stainless Steel Pipes, Duplex Stainless Steel Seamless Pipes, Duplex Stainless Steel Welded Pipes, Duplex Stainless Steel EFW Pipes, Duplex Stainless Tubes, Duplex Stainless Steel Tubing, Super Stainless Steel Pipes, UNS S32205, UNS S31803, UNS S32750, UNS S32760, UNS S31254, SAF 2205, SAF 2507, SMO 254, 6MO, 6 Moly, ZERON 100, ASTM A789, ASTM A790, ASTM A928
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

ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipes Specification
ASTM A789, ASTM A790, ASTM A928, ASME SA789, ASME SA790, ASME SA928
ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipes Grades
UNS S32205, UNS S31803, UNS S32750, UNS S32760, SAF® 2205, SAF® 2507, FERRINOX® 225, AMINOX® 225, ZERON® 100
ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipes Type
SEAMLESS / WELDED / ERW / EFW / COLD DRAW / HOT FINISH / COLD FINISH
ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipes Outer Diameter Size
SEAMLESS - 1/2" NB TO 18" NB
WELDED / ERW- 1" NB TO 16" NB
EFW - 8" NB TO 110" NB
ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipes Wall Thickness
Schedule 10 To Schedule 160 (3 mm to 100 mm Thickness)
ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipes Length
01 Meter to 12.5 Meters, Single Random Length, Double Random Length And Customize Size.
ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipes Ends
Plain Ends / Beveled Ends
ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipes Delivery Conditions
As Rolled, Formed, Stress Relieved, Annealed, Hardened, Tempered, Cold Draw, Bright Annealed
ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipes Coating
Electropolish, Mechanical Polish, Satin Finish, Passivated
ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipes Other Testing
Product Analysis, Transverse Tension Test, Flattening Test, Etching Test, Radiographic 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 A790 UNS S31803 Duplex Stainless Steel Seamless Pipes Dimension
All Pipes Is Manufactured and Inspected / Tested to the Relevant standards including ASTM and ASME
ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipes Value Added Services
Draw / Expansion / Machining / Sand Blasting / Shot Blasting / Heat Treatment
ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipes Packaging
Loose / Bundle / Wooden Pallet / Wooden Box / Plastic Cloth Wraps / Plastic End Caps / Beveled Protector
ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipes 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 A790 UNS S31803 Duplex Stainless Steel Seamless Pipes 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

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

Composition ranges for 2205 grade stainless steels

Grade   C Mn Si P S Cr Mo Ni N
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

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.

Grade Tensile Strength
(MPa) min
Yield Strength
0.2% Proof
(MPa) min
Elongation
(% in 50mm) min
Hardness
Rockwell C (HR C) Brinell (HB)
UNS S31803 / 2205 621 448 25 31 max 293 max

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 Density
(kg/m3)
Elastic
Modulus
(GPa)
Mean Co-eff of Thermal
Expansion (μm/m/°C)
Thermal
Conductivity (W/m.K)
Specific
Heat
0-100°C
( J/kg.K)
Electrical
Resistivity
(nΩ.m)
0-100°C 0-315°C 0-538°C at 100°C at 500°C
UNS S31803 / 2205 782 190 13.7 14.2 - 19 - 418 850

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.

Grade UNS
No
Old British Euronorm Swedish SS Japanese JIS
BS En No Name
2205 S31803 / S32205 318S13 - 1.4462 X2CrNiMoN22-5-3 2377 SUS 329J3L

Possible Alternative Grades

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.

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

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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

Savoy Piping Inc. is a well known worldwide Exporter of ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipes, Savoy Piping 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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