Duplex Steels are extremely resistant to corrosion and have exceptional mechanical strength for the special applications.
Standard: ASTM A789/ ASTM A790, ASTM A312, UreaCasaleor closer
Materials: UNS S31050, 25Cr-22Ni-2Mo
Tongji Engineering offers a comprehensive list of tubing alloys to fit the most and least common applications.
Stainless Steel: 304 Tubing, 316/ 316L/ 316H, 317/ 317L, 309S/ 310H, 310S/ 310H, 321/321H, 347/ 347H
Duplex Stainless Steel: UNS S31803, S32304, S32205, S32750, S32507, S31050, S33207, S32101
Super Austenitic: 6 Moly, 825, 904L, 800/ 800H, N08811
Super Ferritics/ Ferritics: 29-4C, S44627, 439, 444, 446
Nickel Alloy: 20, 200/ 201, 276, 400, 600, 22, 625, 686
Titanium: Grades 1, 2, 3, 7, 9, 11, 12, 16, 17, 26 and 28
Copper alloys: C70600, C71500, C71640, C44300, C68700
Markets We Serve:
Oil & Gas, Power Generation, Chemical, Petrochemical, Food & Dairy, Beverage, Pharmaceutical, Biopharmaceutical, General Commercial, Specialty Automotive
We always seek and improve our service as per requirement of our valued customers.
Standard: ASTM A789/ ASTM A790, ASTM A312, UreaCasaleor closer
Materials: UNS S31050, 25Cr-22Ni-2Mo
Tongji Engineering offers a comprehensive list of tubing alloys to fit the most and least common applications.
Stainless Steel: 304 Tubing, 316/ 316L/ 316H, 317/ 317L, 309S/ 310H, 310S/ 310H, 321/321H, 347/ 347H
Duplex Stainless Steel: UNS S31803, S32304, S32205, S32750, S32507, S31050, S33207, S32101
Super Austenitic: 6 Moly, 825, 904L, 800/ 800H, N08811
Super Ferritics/ Ferritics: 29-4C, S44627, 439, 444, 446
Nickel Alloy: 20, 200/ 201, 276, 400, 600, 22, 625, 686
Titanium: Grades 1, 2, 3, 7, 9, 11, 12, 16, 17, 26 and 28
Copper alloys: C70600, C71500, C71640, C44300, C68700
Markets We Serve:
Oil & Gas, Power Generation, Chemical, Petrochemical, Food & Dairy, Beverage, Pharmaceutical, Biopharmaceutical, General Commercial, Specialty Automotive
We always seek and improve our service as per requirement of our valued customers.
| Commodity | Duplex Steel UNS S31050 Tube & Pipe |
| Process method | Cold drawn/ Cold rolled/ Welded. |
| Materials Grades | UNS S31050, 25Cr-22Ni-2Mo |
| Standards: | ASTM A312,ASTM A789, ASTM A790, UreaCasale or Closer |
| Size | NPS:1/8 to 40" , Schedule: 5S to XXS. Length: 20m or as required. |
| OD: 5 - 1016 mm, Wt: 0.5~ 25mm, Length:20m or as required. | |
| Shape | In straight length or as U-bend |
| Surface Finished | Bright Annealed/ Picking/ Manual Polish/ Mechanical Polish or as required |
| Inspection Testing | 100% Ultrasonic Test, 100%Eddy Current Test, 100%Hydraulic Test, 100% X-Ray Test to welded pipe or as required. |
| Mechanical Test, Hardness Test, Inter-granular corrosion Test. | |
| Certificate | EN 1024 3.1/ 3.1B/ 3.2, PED, DNV, TUV. |
| Packing | Wooden case/ Steel framed plywood case/ simple packing. |
| Delivery Time | By mutual agreement. |