SS 321 Slit CoilASTM A240 · ASTM A480 · Manufacturer, trader & exporter, India
AISI 321 · UNS S32100
An SS 321 slit coil is coil slit to narrower widths, made from SS 321 to ASTM A240. Slit coils feed stamping, roll forming and tube mills. State width, tolerance and coil weight.
- ASTM A240
- ASTM A480
- EN 10204 3.1 / 3.2
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is an SS 321 Slit Coil?
- What it is
- Coil slit to narrower widths
- Material
- ASTM A240
- Dimensions
- ASTM A480
- Grade
- SS 321 · UNS S32100
- Best at
- High-temperature service between 425 and 815 °C
SS 321 Slit Coil Specification
| Product | SS 321 Slit Coil |
|---|---|
| Material standard | ASTM A240 |
| Dimensional standard | ASTM A480 |
| Thickness | 0.1 – 6 mm by route |
| Width | Mill width or slit to order |
| Testing | PMI (as specified in the PO) · dimensional · NDT and IGC on request |
| Documents | EN 10204 3.1 or 3.2 on request / as specified in the PO |
When to Choose a Slit Coil
Slit coils feed stamping, roll forming and tube mills. State width, tolerance and coil weight.
- Slit to width
- Burr-controlled edges
- Coil weight to order
More on choosing: Slit coil guide.
SS 321 Slit Coil: Why 321 for slit coils
Slit coils feed stamping, roll forming and tube mills. State width, tolerance and coil weight. In SS 321, the choice usually comes down to the medium and temperature — the rows here are the points buyers check for this exact combination.
| Why this grade | Stainless coil feeds stamping, tube-making and roll-forming lines. SS 321 is picked for high-temperature service between 425 and 815 °C. |
|---|---|
| Typical service | Aircraft exhaust — Manifolds, bellows and exhaust systems. |
SS 321 Slit Coil Chemical Composition
Under technical review for TDS.
| Element | Current requirement |
|---|---|
| Chromium | As specified |
| Nickel | As specified |
| Titanium | As specified |
| Carbon | As specified |
| Manganese | As specified |
| Silicon | As specified |
| Nitrogen | As specified |
| Phosphorus | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification to be verified: ASTM A240 for UNS S32100.
SS 321 Slit Coil Mechanical Properties
Under technical review for TDS.
| Property | Current requirement |
|---|---|
| Tensile strength | As specified |
| Yield strength 0.2% | As specified |
| Elongation | As specified |
| Hardness | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification and condition to be verified: ASTM A240 for UNS S32100 — Annealed plate & sheet.
Full chemistry, properties and equivalents are on the SS 321 grade page.
SS 321 Slit Coil — questions buyers ask
What width tolerance can slit coil hold?
Typically ±0.1 to ±0.3 mm depending on thickness and width.
Which standard covers SS 321 slit coils?
The material is ASTM A240; dimensions follow ASTM A480. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a SS 321 slit coil?
The alloy price, the size and dimensions, quantity, and the testing and documents required. Send your list and we quote the same working day.
What documents do you supply?
EN 10204 3.1 or 3.2 certificates available on request / as specified in the PO; dimensional reports as required. PMI can be arranged depending on product and requirements, as specified in the PO.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026