SS 321 Stainless Steel
Titanium-stabilised 304 that resists intergranular corrosion at 425 – 815 °C. Used for exhausts and high-temperature service.
Chemical composition of SS 321 (%)
| C | Mn | Si | P | S | Cr | Ni | Ti | N |
|---|---|---|---|---|---|---|---|---|
| 0.08 max | 2.00 max | 0.75 max | 0.045 max | 0.030 max | 17.0 – 19.0 | 9.0 – 12.0 | 5×(C+N) – 0.70 | 0.10 max |
Mechanical properties
| Tensile strength (min) | 515 MPa |
|---|---|
| Yield strength 0.2% (min) | 205 MPa |
| Elongation (min) | 40% |
| Hardness (max) | 95 HRB / 217 HB max |
| Density | 7.92 g/cm³ |
Equivalent grades
| ASTM / AISI | UNS | EN / W.Nr. | DIN | JIS |
|---|---|---|---|---|
| 321 | S32100 | 1.4541 | X6CrNiTi18-10 | SUS 321 |
Applications of SS 321
- Exhaust manifolds and expansion joints
- Aircraft and jet engine parts
- Refinery equipment
- High-temperature chemical process
Our advice
321 keeps its corrosion resistance after long exposure to high temperatures, where plain 304 could become sensitised.
Values are typical ASTM A240 limits for flat products and are for guidance only. Always refer to the mill test certificate supplied with the material.
SS 321 — FAQs
What is the chemical composition of SS 321?
SS 321 contains C 0.08 max%, Mn 2.00 max%, Si 0.75 max%, P 0.045 max%, S 0.030 max%, Cr 17.0 – 19.0%, Ni 9.0 – 12.0%, Ti 5×(C+N) – 0.70%, N 0.10 max% (typical ASTM A240 limits).
What is the equivalent of SS 321?
SS 321 is UNS S32100, EN 1.4541 (X6CrNiTi18-10) and SUS 321 in the Japanese standard.
What is the density of SS 321?
The density of SS 321 is about 7.92 g/cm³ (7920 kg/m³).
Where can I buy SS 321 in Vadodara?
Sagar Sales Corporation supplies SS 321 sheet, plate, round bar, pipe, tube, flanges in Vadodara with mill test certificates. Contact us for today's rate.
Get today's SS 321 rate
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