Yuhong Group Co.,Ltd
Yuhong Holding Group Co.,LTD
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Overview:
TP321 Seamless Tube is a type of austenitic stainless steel tube that is designed for use in high-temperature and corrosive environments. It is often used in industries such as chemical and petrochemical processing, power generation, and oil and gas production.
The TP321 grade of stainless steel is a stabilized version of 304 with added titanium, which provides enhanced mechanical properties and resistance to intergranular corrosion. The titanium effectively stabilizes the microstructure at elevated temperatures, making it more resistant to sensitization and subsequent intergranular corrosion in corrosive environments.
TP321 Seamless Tubes are seamless, meaning they are made without seams or welded joints, which ensures a high degree of structural integrity and stability. They are available in a range of sizes and can be used in various applications from small diameter tubes for instrumentation and control systems to large diameter tubes used in heat exchangers and boilers.
TP321 Seamless Tubes are also highly resistant to corrosion and are suitable for use in applications where they are exposed to corrosive fluids such as acids and alkalies. The tube's excellent corrosion resistance makes it ideal for use in high-temperature and corrosive environments.
The tubes are manufactured according to ASTM A213 and A269 standards and can be produced using a range of cold-working techniques, including cold drawing, cold rolling, and cold forging. The tubes are also commonly used in heat exchangers, boiler tubes, and other high-temperature and high-pressure applications where durability and reliability are essential.
Specification:
| Specification | ASTM A213 & Its equivalent ASME, DIN & EN Standard. |
| Grades | 321; 321H; 1.4541; 1.4878 |
| Type | U-bend & Straight seamless tube |
| Outer Diameter | 1/4'' to 2'' or custom size |
| Wall Thickness | BWG25;BWG22;BWG20;BWG18;BWG16;BWG14;BWG12;BWG10 |
| Length | Up to 6 meters, custom cut lengths |
| Delivery Condition | Solution Annealed & Pickled; Bright Annealed |
| Ends | Plain End, Beveled End |
| Other Testing | Product Analysis, Eddy Current Test, Hydrostatic Test, Ultrasonic Test, Flattening Test, Hardness Test, Tensile Test etc. |
| Dimension | All Pipes & Tube Is Manufactured and Inspected / Tested to the Relevant standards including ASTM and ASME |
| Packing | Plywood case/Woven bag in bundle |
Chemical Composition:
| Grade | UNS | C | Mn | P | S | Si | Cr | Ni | Ti |
| TP321 | S32100 | 0.08 max | 2.00 max | 0.045 max | 0.03 max | 1.00 max | 17.0-19.0 | 9.0-12.0 | 5(C+N)-0.07 |
| TP321H | S32109 | 0.04-0.10 | 2.00 max | 0.045 max | 0.03 max | 1.00 max | 17.0-19.0 | 9.0-12.0 | 4(C+N)-0.07 |
Mechanical Properties:
| Grade | Tensile Strength, min, ksi (MPa) | Yield Strength, min, ksi (MPa) | Elongation in 2 in. or 50mm, min (%) | Hardness | Solutioning Temperature, min, °F(°C) | |
| Rockwell | Brinell/Vickers | |||||
| TP321 | 75(515) | 30(205) | 35 | 90HRB | 192HBW/200HV | 1900(1040) |
| TP321H | 75(515) | 30(205) | 35 | 90HRB | 192HBW/200HV | 2000(1090) |
Applications:
1.Food preparation equipment particularly in chloride environments.
2.Laboratory benches & equipment.
3.Coastal architectural panelling, railings & trim.
4.Boat fittings.
5.Chemical containers, including for transport.
6.Heat Exchangers.
7.Woven or welded screens for mining, quarrying & water filtration.
8.Threaded fasteners.
9.Springs.
