Quick details
| Material grade | SS 321 (UNS S32100) |
|---|---|
| Forms | Pipes, Tubes, Sheets & plates, Round bars, Butt-weld fittings, Flanges |
| 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, stainless steel 321, 321, UNS S32100, W.Nr 1.4541, X6CrNiTi18-10
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.
Product forms and standards
| Form | Standard |
|---|---|
| Pipes | ASTM A312 / ASME SA312 TP321 |
| Tubes | ASTM A213 TP321 |
| Sheets & plates | ASTM A240 / ASME SA240 Type 321 |
| Round bars | ASTM A276 / A479 Type 321 |
| Butt-weld fittings | ASTM A403 WP321 |
| Flanges | ASTM A182 F321 |
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
Applications
- Exhaust manifolds and expansion bellows
- Refinery and petrochemical heater lines
- Furnace and heat-treatment fixtures
- Aircraft and engine exhaust parts
Questions buyers ask
What are the equivalent grades of SS 321?
SS 321 is UNS S32100, Werkstoff 1.4541, EN X6CrNiTi18-10 and JIS SUS 321.
In which forms is SS 321 available?
Pipes to ASTM A312 / ASME SA312 TP321; Tubes to ASTM A213 TP321; Sheets & plates to ASTM A240 / ASME SA240 Type 321; Round bars to ASTM A276 / A479 Type 321; Butt-weld fittings to ASTM A403 WP321; Flanges to ASTM A182 F321.
What is the density of SS 321?
About 7.92 g/cm³ (7,920 kg/m³).
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.