TThe key advantage of adopting duplex stainless steel alloys is that they outperform the other classes in terms of corrosion resistance. In particular, the duplex s31803 seamless pipe's stress-related corrosion cracking capabilities are welcomed in businesses that process both sulphide and chloride ions. Because typical steel pipes have relatively little resistance to such corrosive ions, when sulphide or chloride ions are deposited on their surfaces, they both have a tendency to shatter.
In contrast, the ASTM A790 UNS S31803 Seamless Pipe (Seamless and Welded pipe) was created primarily to address stress corrosion cracking problems. The alloy is also advised by the suppliers of uns s31803 pipe to be used as a remedy for issues like pitting and crevice corrosion. In fact, the seamless S31803 pipe will demonstrate outstanding resistance to pitting and crevice corrosion in highly oxidising and acidic conditions.
These alloys have a greater PREN, or pitting resistance equivalent value, than alloys like 304 or stainless steel alloy 316. Even at low temperatures, UNS S31803 Duplex Steel Seamless Pipe displays remarkable impact toughness. The alloy competes with the price of austenitic stainless steel grades 316 and 317. The walls of the a790 uns s31803 pipe might be made thinner because the alloy's yield strength is two times greater than either grade. In addition to making the s31803 welded pipe lighter in weight, this also lowers the price.
| Standard Specification | ASTM A 312/ ASME SA 312/ A790/ SA790/ ASTM A928/ EN10216-5 |
| Size | ½” to 6” NB Sch 10s, 40s, & 80s, 160s |
| Wall Thickness | 0.1 - 60 mm |
| SS Seamless Pipe Length |
|
| Seamless SS Pipe Surface Finish | Cold Finish, Bright, Polished, Annealing, Pickling, or as per client requirements |
| Standard | JIS, AISI, ASME, ASTM, AMS, GB, DIN, EN, GOST |
| Manufacturing types | Seamless, Welded, ERW, EFW |
| Manufacturing Shapes | Round, Square, Rectangle, Box Section |
| Manufacturing Technology | Hot / Cold Formed |
| Other Grades | SS 446 |
| Inspection, Test Reports | EN 10204 3.1, Mill Test Certificates, PMI Test Reports, Chemical Reports, Mechanical Reports, NABL Approved Lab Reports, Visual Inspection Reports, Destructive and Non Destructive Test Reports, Third Party Inspection |
| Technique | Cold Rolled Hot Rolled |
| 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 |
| 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 |
| Grade 2205 | 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 | 782 | 190 | 13.7 | 14.2 | – | 19 | – | 418 | 850 |
| Grade | ASTM | UNS No |
Old British | Euronorm | Swedish SS | Japanese JIS | ||
|---|---|---|---|---|---|---|---|---|
| BS | En | No | Name | |||||
| 2205 | ASTM A790 ASTM A789 ASTM A928 |
UNS S31803 | 318S13 | – | 1.4462 | X2CrNiMoN22-5-3 | 2377 | SUS 329J3L |
| NPS Designator | Permissible Variations in Outside Diameter | |
|---|---|---|
| Over In. | Under In. | |
| 1/8 to 1-1/2, incl | 1/64 (0.015) | 1/32 (0.031) |
| Over 1-1/2 to 4, incl | 1/32 (0.031) | 1/32 (0.031) |
| Over 4 to 8, incl | 1/16 (0.062) | 1/32 (0.031) |
| Over 8 to 18, incl | 3/23 (0.093) | 1/32 (0.031) |
We have supplied a wide range of Duplex Steel ASTM A790 UNS S31803 Pipe for a variety of applications in the following countries
| A790 S31803 Seamless Pipe | Dammam -KSA, Europe, Philippines, Belgium |
| SA789 S31803 welded pipes | Qatar, France, Indonesia, Thailand |
| ASTM A928 UNS S31803 material | Czechia, Germany, USA, Malaysia |
| SA 789 UNS S31803 Tubing | Malaysia, Thailand, Bangladesh, Finland |
| PIPE SMLS/ WELDED SCH 10, ASTM A790/A928 CL 1 UNS S31803 | South Africa, Kuwait, Singapore, Brazil |
| SA 790 S31803 Duplex Pipe | Bahrain, South Africa, Saudi Arabia (KSA), Singapore |
| ASTM A789 UNS S31803 Class 1 Pipes | Philippines, France, UK, Hong Kong, Nigeria |
| SA 790 UNS S31803 SS material | Oman, Malaysia, Australia, UAE |
| SCH.80S A90-S31803 Seamless pipes | Chile, Italy, United Arab Emirates (UAE), Singapore |
| 2” SCH80S ASTM A790 UNS S31803 | Iran, Turkey, Russia, Malaysia |
| ASME B36.10M/19M ASTM A928 -CLASS 1 UNS S31803 | Netherlands, Malaysia, Norway, Dubai |
| EN 10204 -3.1 DRL DN400 SCH 10S PIPE, UNS S31803 | Egypt, Spain, Europe, UK |
| PIPE, UNS S31803, Schedule 40, NPS16 | United Kingdom -UK, Mexico, Malaysia, UAE |
| S/10S SEAMLESS PIPE ASTM A790 S31803, BEVEL ENDS | UK, Canada, Singapore Ellington -United States |
| 12" ASTM A790 UNS S31803 Pipe, Sch 60 | Philippines, Malaysia, Canada, Poland |
| Sch. 60 A790 S31803 SMLS Pipe BE | Europe, Romania, Colombia, Malaysia |
| ASME B36.19M A790 UNS S31803 | Los Alamos -Mexico, Japan, Malaysia, China |
| 120m of 6" Sch 80 ASTM A790 UNS S31803 | Malaysia, Taiwan, Sweden, Philippines |
| ASME B36.19M SCH10S ASTM A790 S31803 Tube | Singapore, NY 12203 (USA), South Korea, Malaysia |
