Duplex Steel seamless heat exchanger tube Duplex Steels are extremely resistant to corrosion and have exceptional mechanical strength for the special applications. Standard: ASTM A789/ ASTM A790, ASTM A312 or closer Grades: UNS S31803, S32304, S32205, S32750, S32507, S31050, S33207, S32101 etc. Size: OD: 5 - 1016 mm, Wt: 0.5~ 25mm, Length:20m or as required 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.
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