SUS321 Stainless Steel Pipe For Exhaust Systems
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What is SUS321 stainless steel exhaust pipes?
If you are looking for SUS321 stainless steel exhaust pipes, GNEE offers high-quality, titanium-stabilized austenitic stainless steel tubing with a long-term operating temperature of approximately 870°C (1600°F), exhibiting excellent resistance to high-temperature oxidation and intergranular corrosion.
Our pipes conform to international standards such as ASTM A312/A213, EN 10216-5, and JIS G3463, with outer diameters ranging from 6–219 mm, wall thicknesses from 0.5–12.7 mm, and lengths customizable up to 12 meters. GNEE provides ISO 9001, SGS, and BV certifications and supports custom cutting, bright annealing, internal polishing, and free sample services. Our products are widely used in automotive exhaust systems, industrial fume extraction, and high-temperature fluid transport.
SUS321 Stainless Steel Pipe / Tube Specifications
| Item | Details |
|---|---|
| Grade | SUS321 / EN 1.4541 / AISI 321 |
| Standard | ASTM A213, ASTM A269, JIS G3463, EN 10216-5 |
| Outer Diameter | 6 mm – 219 mm (custom sizes available) |
| Wall Thickness | 0.5 mm – 12.7 mm |
| Length | 1000 mm – 6000 mm or cut-to-size |
| Mechanical Properties | Yield Strength ≥ 205 MPa, Tensile Strength 515–715 MPa |
| Hardness | HB ≤ 217 |
| Surface Finish | BA (Bright Annealed), 2B, Pickled |
| Certification | ISO 9001, SGS, BV, MTC 3.1/3.2 |
| Packaging | Wooden cases/pallets with moisture-proof protectio |
Can SUS321 tubing withstand continuous high-temperature exhaust environments?
Yes, SUS321 stainless steel tubing can fully withstand continuous high-temperature exhaust environments. This material is a titanium-stabilized austenitic stainless steel with excellent high-temperature oxidation resistance and resistance to intergranular corrosion. Its long-term permissible operating temperature can reach approximately 870°C (1600°F). Compared to ordinary 304 or 316 stainless steel, SUS321 is less prone to oxidation, cracking, or intergranular corrosion at high temperatures, making it ideal for applications requiring continuous high-temperature resistance, such as automotive exhaust systems, industrial exhaust ducts, and high-temperature heat exchangers.
What are the differences between SUS321 and SUS304 in exhaust systems?
In high-temperature exhaust systems, SUS321 outperforms SUS304 because the added titanium prevents intergranular corrosion and maintains structural integrity at temperatures above 800°C (1472°F). SUS304 is an economical choice for standard exhaust systems where temperatures do not exceed 800°C, but SUS321 is a better choice for extreme high-temperature environments such as turbocharger manifolds and aircraft exhaust systems.
SUS321 Stainless Steel Pipe Price List
Due to its titanium stabilization treatment, SUS321 stainless steel pipe is slightly more expensive than SUS304 stainless steel pipe, typically by $2.8 to $3.2 per kilogram, reflecting its superior high-temperature performance. Preferential pricing is usually available for bulk orders and long-term supply agreements.
GNEE Services
We offer precision cutting, bending, polishing, and custom machining services. Free samples are available for quality verification. Packaging includes moisture-proof film and wooden pallets to ensure safe export.
