SS 321 Pipes.
Seamless and welded pipe for process lines, pressure piping, utilities and structural use. Supplied to ASTM A312 / ASME SA312 TP321.
Quick details
| Material grade | SS 321 (UNS S32100) |
|---|---|
| Standard | ASTM A312 / ASME SA312 TP321 |
| Type | Seamless, Welded (ERW / EFW), Electropolished on request, Cut lengths |
| Size range | 1/8" to 24" NB (6 to 600 DN); larger sizes on enquiry |
| Usage / application | Exhaust manifolds and expansion bellows, Refinery and petrochemical heater lines, Furnace and heat-treatment fixtures |
| Test certificate | EN 10204 3.1 mill test certificate; 3.2 on request |
| Business type | Stockist and supplier |
| Location | Kumbharwada, Mumbai 400004, Maharashtra |
Also searched as: SS 321 pipe, 321 stainless steel pipe, stainless steel 321 pipe, SS 321 seamless pipe, SS 321 welded pipe, ASTM A312 TP321 pipe, UNS S32100 pipe, 1.4541 pipe
Product information for purchasing teams
SS 321 is 304 stabilised with titanium. It keeps its resistance to intergranular corrosion after long service between about 425 and 815 °C, so it is chosen for exhaust systems, expansion joints, furnace parts and refinery lines that run hot.
Exact specification, availability and commercial details are confirmed against your enquiry.
SS 321 Pipes specifications
| Material standard | ASTM A312 / ASME SA312 TP321 |
|---|---|
| Grade | SS 321, UNS S32100, W.Nr 1.4541 |
| Size range | 1/8" to 24" NB (6 to 600 DN); larger sizes on enquiry |
| Schedules | Sch 5S, 10S, 40S, 80S, 160 and XXS, or specified wall thickness |
| Dimensional standards | ASME B36.19M (stainless), ASME B36.10M (carbon and alloy) |
| Lengths | Single random, double random and cut-to-length |
| Ends | Plain, bevelled or threaded |
| Testing | Hydrostatic, eddy current, PMI and third-party inspection on request |
| Documents | Mill test certificate to EN 10204 3.1; 3.2 on request |
Equivalent grades
| Grade | UNS | Werkstoff Nr. | EN / BS | JIS |
|---|---|---|---|---|
| SS 321 | S32100 | 1.4541 | X6CrNiTi18-10 | SUS 321 |
Chemical composition, %
| Grade | C | Mn | Si | P | S | Cr | Ni | Ti | N |
|---|---|---|---|---|---|---|---|---|---|
| SS 321 | ≤ 0.08 | ≤ 2.00 | ≤ 0.75 | ≤ 0.045 | ≤ 0.030 | 17.0 – 19.0 | 9.0 – 12.0 | 5 × (C + N) – 0.70 | ≤ 0.10 |
Mechanical properties
| Property | Value |
|---|---|
| Tensile strength | ≥ 515 MPa |
| Yield strength (0.2%) | ≥ 205 MPa |
| Elongation | ≥ 40% |
| Hardness | ≤ 217 HB |
Values per ASTM A240, annealed. Confirm against the current edition of the standard and your purchase specification.
Density: 7.92 g/cm³
Types we supply
- Seamless
- Welded (ERW / EFW)
- Electropolished on request
- Cut lengths
Applications
- Exhaust manifolds and expansion bellows
- Refinery and petrochemical heater lines
- Furnace and heat-treatment fixtures
- Aircraft and engine exhaust parts
Questions buyers ask
Which standard covers SS 321 Pipes?
SS 321 Pipes are supplied to ASTM A312 / ASME SA312 TP321.
What sizes of SS 321 Pipes does Steel Impex India supply?
Size range: 1/8" to 24" NB (6 to 600 DN); larger sizes on enquiry. Schedules: Sch 5S, 10S, 40S, 80S, 160 and XXS, or specified wall thickness. Exact availability is confirmed for each enquiry.
Do SS 321 Pipes come with a mill test certificate?
Yes. Material is supplied with a mill test certificate to EN 10204 3.1, traceable to the heat number. Third-party inspection to 3.2 can be arranged on request.
What should I send for a SS 321 Pipes quotation?
Send nominal size, schedule or wall thickness, seamless or welded, length, quantity and certificate type.
Where is Steel Impex India located?
Steel Impex India is at 231/235, Sant Sena Maharaja Marg, 2nd Kumbharwada, Mumbai 400004, and supplies across India.