Delivering High Quality Stainless Steel and Alloy Piping Products — Pipes, Tubes, Fittings, Flanges and more for Global Industries.
sales@savoypipinginc.com
Delivering High Quality Stainless Steel and Alloy Piping Products — Pipes, Tubes, Fittings, Flanges and more for Global Industries.
sales@savoypipinginc.com
Savoy Piping Inc. supplies ASTM A789 S31803 seamless tubes — 22% Cr duplex stainless (ferrite–austenite) — higher strength and chloride resistance than 316L.
A790 Seamless · A790 Welded · A789 Tube · A928 EFW · Duplex hub
Also see: Duplex & super duplex hub · Duplex buttweld · Duplex flanges.
Duplex/super duplex tube for heat transfer and process duty. typical duplex min yield ~450 MPa (65 ksi), tensile ~620 MPa (90 ksi) — confirm A790/A789 PO.
Many POs now prefer tighter S32205. Do not mix S31803/S32205 without engineer approval. Temp window typically avoids prolonged >250–300°C and deep cryogenic.
| 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 / 4 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
| 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 |
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 S32205 / 2205 | 620 | 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.
| 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 S32205 / 2205 | 7800 | 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.
| 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 |
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
A789 covers seamless and welded duplex stainless tubes for general corrosive service. S31803: 22% Cr duplex stainless (ferrite–austenite) — higher strength and chloride resistance than 316L.
A789 = tube; A790 = pipe. Match the noun on the purchase order.
Oil & gas process and seawater piping; Chemical process with chlorides; Pressure systems needing higher allowable stress than austenitic
Use qualified duplex procedures; control heat input. U-bends may need post-bend heat treatment when specified.
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, Myanmar, Taiwan, Cambodia, Argentina, Bolivia, Brazil, Chile, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States of America, Canada, Mexico, Panama, Costa Rica, Puerto Rico, Trinidad And Tobago, Jamaica, Bahamas, Denmark, Russia, Norway, Germany, France, Italy, United Kingdom, Spain, Ukraine, Netherlands, 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 deal 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.