SS 304 Pipe
The most widely used 18/8 austenitic grade – seamless & welded SS 304 pipes for food, water, chemical and structural use.
View details →SS 321 Pipe Supplier – Titanium Stabilised Stainless Steel Pipe
ASTM A312 TP321 / 321H pipes for elevated-temperature service between 425 °C and 900 °C.
SS 321 Pipe – Grade Overview
SS 321 pipe is an 18/8 austenitic stainless steel pipe stabilised with titanium. Titanium ties up carbon as titanium carbides, so stainless steel 321 pipe does not suffer chromium-carbide precipitation when it operates for long periods in the 425–850 °C range – the temperature band where 304 can become sensitised.
We supply SS 321 and 321H seamless and welded pipes for exhaust manifolds, expansion bellows, refinery and petrochemical heaters, boiler shells and power-plant piping.
Why Choose Stainless Steel 321 Pipe?
321H (higher carbon) offers better creep strength above 500 °C. For applications below 425 °C, standard SS 304 pipe is usually more economical.
SS 321 Pipe Specification
| Product | SS 321 Pipe |
|---|---|
| Standard | ASTM A312 / A358, ASME SA312 |
| Type | Seamless, Welded, ERW, EFW |
| Size Range (NB) | 1/8" NB to 24" NB (larger sizes on order) |
| Outside Diameter | 6 mm to 609.6 mm |
| Wall Thickness | SCH 5S, 10S, 20, 40S, STD, 80S, XS, 160, XXS |
| Length | Single random, double random, 6 m fixed, cut-to-length |
| Form | Round, square, rectangular, hydraulic, U-tube, coiled |
| Finish | Annealed & pickled, bright annealed, mirror / satin polished, matt |
| Ends | Plain end, bevelled end, threaded end |
| Testing | Hydrostatic, eddy current, PMI, IGC, flattening & flaring |
| Certificate | EN 10204 3.1 mill test certificate; TPI on request |
SS 321 Pipe Chemical Composition (%)
| Element | Content (wt %) |
|---|---|
| Carbon (C) | 0.08 max |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 0.75 max |
| Phosphorus (P) | 0.045 max |
| Sulphur (S) | 0.030 max |
| Chromium (Cr) | 17.0 – 19.0 |
| Nickel (Ni) | 9.0 – 12.0 |
| Titanium (Ti) | 5×(C+N) min – 0.70 max |
| Nitrogen (N) | 0.10 max |
Mechanical & Physical Properties of SS 321 Pipe
| Property | Value |
|---|---|
| Tensile Strength | 515 MPa min |
| Yield Strength (0.2%) | 205 MPa min |
| Elongation | 35% min |
| Hardness | 95 HRB max |
| Density | 7.92 g/cm³ |
| Melting Range | 1400 – 1425 °C |
SS 321 Pipe Equivalent Grades
| Grade | UNS | Werkstoff Nr. | EN | JIS |
|---|---|---|---|---|
| SS 321 | S32100 | 1.4541 | X6CrNiTi18-10 | SUS 321 |
SS 321 Pipe Price per Kg (Indicative)
The current indicative SS 321 Pipe price is ₹380 – ₹480 per kg. SS 321 / 321H is supplied against order. Stainless steel prices change with global nickel and molybdenum rates, so call +91 94271 02074 or send an enquiry for today's rate. See our full SS pipe price list.
Prices are indicative only and exclude GST, freight and testing charges.
Applications of SS 321 Pipe
- Aircraft & automotive exhaust systems
- Expansion joints and bellows
- Refinery & petrochemical heaters
- Boiler and superheater piping
- Thermal oxidisers
- High-temperature chemical process lines
Why Buy SS 321 Pipe from Innovative Corporation?
- Genuine material with EN 10204 3.1 mill test certificates
- Ready stock in Ahmedabad – quick dispatch across India
- Competitive wholesale price per kg
- Cut-to-length, polishing and packing as per requirement
- Expert guidance on grade, size and schedule selection
SS 321 Pipe – FAQs
Why is titanium added to SS 321?
Titanium stabilises the steel by forming titanium carbides, preventing chromium carbide formation and intergranular corrosion at elevated temperatures.
What is SS 321 pipe used for?
SS 321 pipe is used for exhaust systems, expansion joints, heaters, boilers and process lines operating between 425 °C and 900 °C.
Related Stainless Steel Products
SS 316 Pipe
Molybdenum-bearing grade with superior chloride and acid resistance – SS 316 seamless & welded pipes for chemical and marine duty.
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SS 202 Pipe
Economical Cr-Mn-Ni grade for railings, furniture, kitchen equipment and indoor fabrication – round, square & rectangular.
View details →SS 304L Pipe
Low-carbon version of 304 for welded process lines – avoids carbide precipitation and intergranular corrosion.
View details →