| Standard: | ASTM， AISI， GB， DIN， JIS | Type: | Seamless， Welded， Round Pipe/Tube |
|---|---|---|---|
| Technique: | Cold Rolled Hot Rolled， Cold Drawn， Extrusion， Cold Drawn/Cold Rolling Or Both Of Them | Surface: | Annealing， 8K， Polishing Or Unpolishing， Morror/Satin |
| Finish: | Brush Polish， Cold Drawn， Pickled， Bright Annealed Or Un Annealed， Bright | ||
| High Light: | Boiler Bright Annealed Tube， Seamless Bright Annealed Tubing， TP321 Bright Steel Tube | ||
ASME SA213 TP321 SS Seamless Polished Tube For Heat-Exchanger And Boiler Superheater
The stainless steel tubing is generally produced by a cold-drawing process. A subsequent annealing process is required to eliminate residue stress and obtain improved softness and ductility. Meanwhile， since chromium carbides formed at the grain boundaries during high-temperature exposure may result in susceptibility of the austenitic stainless steel to intergranular corrosion， they must be dissolved during annealing before cooling begins. If the annealing is conducted in a protective atmosphere such as pure hydrogen or dissociated ammonia， the formation of an oxide layer on the tubing exterior and interior surfaces can be completely avoided. The stainless steel tubing maintains its original metal luster as well as excellent surface finish.
Standard Specification:
ASTM A213/A213M-11a: Standard Specification for Seamless Ferritic and Austenitic Alloy Steel Boiler， Superheater， and Heat Exchanger Tubes
ASTM A269-10: Standard Specification for General Purpose Seamless and Welded Austenitic Stainless Steel Pipe
ASTM A312/A312M-12: Standard Specification for Seamless， Welded， and Recold-Worked Austenitic Stainless Steel Pipe
ASTM A511/A511M-12: Standard Specification for Seamless Stainless Steel Mechanical Tubing
ASTM A789/A789M-10a: Standard Specification for General Purpose Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe
ASTM A790/A790M-11: Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe
DIN 17456-2010: Seamless round stainless steel tubes for general purpose.
DIN 17458-2010: Seamless round austenitic stainless steel tubes
EN10216-5 CT 1/2: Stainless Steel
GOST 9941-81: Seamless cold-worked and warm-worked tubes made of corrosion-resistant steel.
Other standards such as BS and JIS available
The addition of titanium also provides high corrosion resistance to ASTM A213 TP 321 pipe. Due to the addition of titanium， the risk of intergranular corrosion present in most high carbon steels in 321 stainless steel pipe is reduced. 321 stainless steel exhaust pipe lasts longer at high temperatures. Therefore， 321 stainless steel seamless tubes are used in heat exchangers and superheaters. These pipes are available in different types such as 321 stainless steel hoses that are easy to install and maintain. Applications for TP 321 stainless steel tubing can also be seen in boilers and condensers. We manufacture high quality 321 SS tubing in different sizes and types. Our SS 321 is suitable for small size pipes with high precision. This corrosion resistant steel can also be identified as 321 Cres Tubing. Our customers can also get custom finishes for these pipes. If you have any questions about product details or pricing， please contact us.
Material Grade:
| Grade | UNS Designation | Carbon | Manganese | Phosphorus | Sulfur | Silicon | Chromium | Nickel | Molybdenum | Nitrogen | Niobium | Titanium | Other Elements |
| TP321 | S32100 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 17.0-19.0 | 9.0-12.0 | 2.00-3.00 | — | — | 5(C + N)– 0.70 | — |
| American Standard | Austenitic Steel: TP304， TP304L， TP304H， TP304N， TP310S， TP316， TP316L， TP316Ti， TP316H， TP317， TP317L， TP321， TP321H， TP347， TP347H， 904L… Duplex Steel : S31803， S32101， S32205， S32304， S32750， S32760 Others: TP405， TP409， TP410， TP430， TP439，… |
| Europen Standard | 1.4162， 1.4301， 1.4307，1.4362， 1.4401， 1.4404， 1.4410， 1.4438， 1.4462， 1.4501， 1.4539， 1.4541， 1.4550， 1.4571， 1.4841， 1.4845，1.4878， 1.4948， |
| GOST | 08Х17Т， 08Х13， 12Х13， 12Х17， 15Х25Т， 04Х18Н10， 08Х20Н14С2， 08Х18Н12Б， 10Х17Н13М2Т， 10Х23Н18， 08Х18Н10， 08Х18Н10Т， 08Х18Н12Т， 08Х17Н15М3Т， 12Х18Н10Т， 12Х18Н12Т， 12Х18Н9， 17Х18Н9， 08Х22Н6Т， 06ХН28МДТ |
A213 TP321 Stainless Steel Seamless Tube Mechanical Properties
| Tensile Strength | Psi – 75000 ， MPa – 515 |
| Yield Strength (0.2%Offset) | Psi – 30000 ， MPa – 205 |
| Elongation | 35% |
Size Range:
| Production | Outside Diameter | Wall Thickness |
| Seamless Pipe | 6.00mm-830mm | 0.5mm-48mm |
Tube size and thickness are usually provided to this specification ranges from 1⁄8 inch [3.2 mm] inner diameter to 5 inches. [127 mm] outer diameter and 0.015 to 0.500 inches [0.4 to 12.7 mm]， including minimum wall thickness， or， if specified Followed by the average wall thickness. Tubing has other diameters can be provided， as long as these tubes meet all other requirements of this specification.
Application:
- Food processing equipment， especially beer brewing， milk processing and wine making.
- Kitchen benches， sinks， sinks， equipment and appliances
- Building paneling， railings and decoration
- Chemical containers， including for transportation
- Heat exchanger
- Woven or welded screens for mining， quarrying and water filtration
- Threaded fasteners
- Spring
- Other
