Another variant of the 304 standards, small diameter 321 stainless steel tubing (UNS designation UNS S32100) composition includes titanium which makes the resulting tubing stronger and more corrosion resistant at higher temperatures.
Small diameter 321 stainless steel tubing has substantially better resistance to intergranular corrosion which is corrosion that occurs in between the microstructure---between the grains of different elements that make up the alloy. 321 SS is, therefore, an important material option for tubing products with service cycles in the 800-1500º carbide precipitation range because the life of the product will be extended (relative to other grades of stainless steel).
Chemical Material Composition
| Grade | Ni | Mn | P | C | S | Si | Cr | Ti | N | |
| 321 | min. | 9 | – | – | – | – | – | 17 | 5(C+N) | – |
| max. | 12 | 2 | 0.045 | 0.08 | 0.03 | 1 | 19 | 0.70 max | 0.1 | |
321 SS Tubing Features & Applications
321 stainless steel tubing manufactured for high-temperature applications exhibits excellent resistance to fatigue and cracking, making it ideal for applications including:
Metal O-ring products
Select aerospace applications
Exhaust manifolds
Oil and gas/refinery applications
Processing equipment for high-temperature chemicals
Many other high-temperature service applications
Like our other welded and drawn products, small diameter 321 SS tubing is welded from strip stock, plug drawn in coil form, annealed as needed in order to meet customer temper requirements, and offered in straight lengths or coil form.
321 stainless steel | |||||||
Standard | Grade | Chemical Composition % | Temper | Yied strength/Mpa | Tensile strength/Mpa | Elongation % | Hardness |
GB | 1Cr18Ni9Ti | C≤0.08，Mn≤2.00，Si≤0.75，P≤0.045，S≤0.0.30，Cr 17.0~19.0,Ni 9.0~12.0，N≤0.10，Ti〔5x﹙C+N﹚〕~0.70 | hot /cold rolled | ≥205 | ≥518 | ≥40 | HV≤200 |
USA | 321 | ||||||
JIS | SUS321 | ||||||
German | 1.4541 | ||||||
1.Oil and gas burning pipeline
2.Engine exhaust pipe
3.Shell of the boiler, heat exchangers, heating furnace part
4.Silencer for diesel parts
5.Boilers and pressure vessels
6.Chemical transportation vehicle
7.Expansion joint
8.Furnace pipes and drying machines for spiral welded pipe
1) Fast delivery time.
2) High quality, quantity is with preferential treatment.
3) We can process to different finish you request.
4) Main distributor and gold supplier.
5) 800 Tons/Month, high production capability will short your wait time.
6) Tisco, Jisco, SPSS, QPSS, Baoxin, Baosteel and other famous brand.
7) Good quality with reasonable price.
8) Buyer's Specification Accepted.
9) Experienced R & D Department.
We are honored to offer you samples ( A4 paper size will be free)
Interleave paper, Waterproof paper,metal belt pack the sheet, wooden pallet.
Normally 7 day after deposit received or L/C at sight.
