SS 321 / 321H Stainless Steel Plates & Sheets.
SS 321 and 321H stainless steel plate and sheet enquiries for applications where a titanium-stabilized grade is specified.
Quick details
| Material grade | SS 321 (UNS S32100) |
|---|---|
| Standard | ASTM A240 / ASME SA240 Type 321 |
| Type | Cold-rolled sheet, Hot-rolled plate, Coil and strip, Cut-to-size blanks |
| Thickness | Sheet 0.4 mm to 6 mm; plate 6 mm to 100 mm; heavier 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 plate, 321 stainless steel plate, stainless steel 321 plate, SS 321 sheet, ASTM A240 Type 321 plate, UNS S32100 plate, 1.4541 plate
Product information for purchasing teams
SS 321 and 321H stainless steel plate and sheet enquiries for applications where a titanium-stabilized grade is specified. Exact specification, availability and commercial details are confirmed against your enquiry.
Fabricated components and elevated-temperature service where the project specification calls for 321/321H. Confirm the suitability against design conditions.
Standards and specifications
ASTM A240 / ASME SA240 commonly applies to stainless steel plate, sheet and strip. Confirm the grade, standard and required condition before purchase.
Grades and material families
SS 321 / UNS S32100 and SS 321H / UNS S32109. Confirm the specified grade rather than substituting between variants.
Forms and supply options
Plate, sheet, coil and specified cut sizes subject to dimensions and sourcing confirmation.
SS 321 Sheets & Plates specifications
| Material standard | ASTM A240 / ASME SA240 Type 321 |
|---|---|
| Grade | SS 321, UNS S32100, W.Nr 1.4541 |
| Thickness | Sheet 0.4 mm to 6 mm; plate 6 mm to 100 mm; heavier on enquiry |
| Sizes | 1250 × 2500 mm, 1500 × 3000 mm, 2000 × 6000 mm, or cut to size |
| Finishes | 2B, BA, No. 1 (HRAP), No. 4 brushed, mirror, chequered |
| Cutting | Shearing, plasma and in-house 3 kW CNC laser cutting |
| Testing | PMI, ultrasonic testing of plate 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
- Cold-rolled sheet
- Hot-rolled plate
- Coil and strip
- Cut-to-size blanks
Applications
- Exhaust manifolds and expansion bellows
- Refinery and petrochemical heater lines
- Furnace and heat-treatment fixtures
- Aircraft and engine exhaust parts
What to include in your RFQ
Share the exact grade and standard, product dimensions, quantity, required delivery location and any inspection or material certificate requirements. This helps the team review the specification and confirm availability before quotation.
Questions buyers ask
Which standard covers SS 321 Plates?
SS 321 Plates are supplied to ASTM A240 / ASME SA240 Type 321.
What sizes of SS 321 Plates does Steel Impex India supply?
Thickness: Sheet 0.4 mm to 6 mm; plate 6 mm to 100 mm; heavier on enquiry. Sizes: 1250 × 2500 mm, 1500 × 3000 mm, 2000 × 6000 mm, or cut to size. Exact availability is confirmed for each enquiry.
Do SS 321 Plates 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 Plates quotation?
Send thickness, width × length (or cut-size drawing), finish, 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.