JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
| Payment Terms | T/T, Western Union, L/C |
| Supply Ability | 10 Ton per week |
| Delivery Time | 5 - 12 days based on the quantity |
| Packaging Details | standard packing for export |
| Products | Stainless Steel Hexagonal Pipe |
| Grade | 304 316L 321 2205 310S 904L.etc |
| Standard | ASTM GB EN |
| Length | 6m or as request |
| Diameter | S14-S70 |
| Innner Diameter | 4 - 60mm |
| Type | seamless pipe |
| Service | cutting |
| Other Shape | square, rectangle |
| Brand Name | DELTA |
| Model Number | 201 304 316L 321 310S 314 347 2205 2507 904L.etc |
| Certification | ISO |
| Place of Origin | China |
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Product Specification
| Payment Terms | T/T, Western Union, L/C | Supply Ability | 10 Ton per week |
| Delivery Time | 5 - 12 days based on the quantity | Packaging Details | standard packing for export |
| Products | Stainless Steel Hexagonal Pipe | Grade | 304 316L 321 2205 310S 904L.etc |
| Standard | ASTM GB EN | Length | 6m or as request |
| Diameter | S14-S70 | Innner Diameter | 4 - 60mm |
| Type | seamless pipe | Service | cutting |
| Other Shape | square, rectangle | Brand Name | DELTA |
| Model Number | 201 304 316L 321 310S 314 347 2205 2507 904L.etc | Certification | ISO |
| Place of Origin | China | ||
| High Light | 321 Stainless Steel Hexagonal Hollow Tube ，S14 Stainless Steel Hexagonal Hollow Tube ，S75mm Stainless Steel Hexagonal Hollow Tube | ||
TP321 Stainless Steel Hexagonal Hollow Tube 321 Stainless Steel Hex Pipe S14 - S75mm
| Commodity | 304 316 321 Hollow Hexagonal Stainless Steel Pipe |
| Grade | Austenitic: 304/L/H/N, 316/L/H/N/Ti, 321/H, 309/H, 310S, 347/H, 317/L, 904L Duplex steel: S31803,S32205,S32750,S32760 |
| Standard | ASTM A213, A312, ASTM A269,ASTM A778, ASTM A789, DIN 17456,DIN 17457,DIN 17459, JIS G3459, JIS G3463, GOS T9941,EN 10216, BS3605, GB13296,etc. |
| Technique | Hot Rolled / Cold Drawn |
| Type | Seamless pipe |
| Size | S14*6-8 - S80*55-70mm |
| Length | custom any length as request |
| Packing | In bundles, Nylon bags, wooden cases or as required |
| Delivery Time | Ready stocks 3-7 days, customized 7-10 days for customized size |
| MOQ | 1 Ton |
| Export To | Singapore, Canada, Indonesia, Korea, USA, UK, Thailand,Saudi Arabia, Vietnam,India, Peru, Ukraine ,Brazil,South Africa, etc. |
321 stainless steel hexagonal pipe is a hollow hexagonal bar made from titanium-stabilized austenitic stainless steel (321). The addition of titanium (Ti) enhances its resistance to intergranular corrosion, particularly in high-temperature environments (up to 900°C). It is widely used in aerospace, chemical processing, heat exchangers, and exhaust systems due to its excellent thermal stability and oxidation resistance.
Shape & Dimensions:
Hexagonal across flats (S): 6mm to 50mm
Wall thickness (T): 0.5mm to 5mm
Length: 1m to 6m (custom lengths available)
Surface Finish: Smooth, polished, or matte finish options.
International Standards:
ASTM A312/A269 (Seamless & Welded Pipes)
ASTM A554 (Welded Mechanical Tubing)
EN 10296-2 (European Standard)
Chinese Standards:
GB/T 12770 (Welded Stainless Steel Pipes)
GB/T 14976 (Seamless Stainless Steel Pipes)
| Element | C≤ | Si≤ | Mn≤ | P≤ | S≤ | Cr | Ni | Ti | Fe |
|---|---|---|---|---|---|---|---|---|---|
| 321 | 0.08 | 0.75 | 2.00 | 0.045 | 0.03 | 17.0-19.0 | 9.0-12.0 | ≥5×C% | Balance |
Key Feature: Titanium (Ti) ≥ 5×C% prevents chromium carbide precipitation, improving high-temperature performance.
| Property | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| 321 | ≥520 | ≥205 | ≥40 | ≤187 |
Note: Retains strength at elevated temperatures (up to 900°C).
Material Preparation: 321 stainless steel billets (with Ti stabilization).
Forming:
Seamless Pipes: Hot extrusion or cold drawing.
Welded Pipes: Rolled into hexagonal shape and TIG welded.
Heat Treatment: Solution annealing (920–1150°C) followed by rapid cooling to dissolve carbides.
Surface Treatment: Pickling, passivation, or polishing for corrosion resistance.
✅ High-Temperature Resistance: Stable up to 900°C (avoids sensitization).
✅ Intergranular Corrosion Resistance: Titanium prevents chromium depletion.
✅ Oxidation Resistance: Forms a protective Cr₂O₃ layer in oxidizing atmospheres.
✅ Good Weldability: Suitable for welded structures.
Standard: Plastic end caps, bundled with steel straps, waterproof wrapping.
Special: Wooden crates for heavy-duty protection.
Aerospace: Jet engine components, exhaust systems.
Chemical Industry: High-temperature pipelines, reactors.
Heat Exchangers: Boilers, condensers.
Automotive: Exhaust manifolds, catalytic converters.
Architecture: Decorative structures requiring heat resistance.
321 stainless steel hexagonal pipe is ideal for high-temperature and corrosive environments, offering superior thermal stability and mechanical strength. Its titanium stabilization ensures long-term performance in critical applications.
Need customization or testing reports? Contact us for details!
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter
Total Annual:
>1000000
Employee Number:
>100
Ecer Certification：
Verified Supplier
Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative... Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative...
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