SS 321 Precision StripASTM A240 · ASTM A666 / A480 · Manufacturer, trader & exporter, India
AISI 321 · UNS S32100
An SS 321 precision strip is thin strip with close thickness tolerance, made from SS 321 to ASTM A240. Precision strip is used for springs, gaskets, electronics and precision components.
- ASTM A240
- ASTM A666 / 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 Precision Strip?
- What it is
- Thin strip with close thickness tolerance
- Material
- ASTM A240
- Dimensions
- ASTM A666 / A480
- Grade
- SS 321 · UNS S32100
- Best at
- High-temperature service between 425 and 815 °C
SS 321 Precision Strip Specification
| Product | SS 321 Precision Strip |
|---|---|
| Material standard | ASTM A240 |
| Dimensional standard | ASTM A666 / 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 Precision Strip
Precision strip is used for springs, gaskets, electronics and precision components.
- Thin gauges
- Tight tolerances
- Hardness to order
More on choosing: Precision strip guide.
SS 321 Precision Strip: Why 321 for precision strips
Precision strip is used for springs, gaskets, electronics and precision components. 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 Precision Strip 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 Precision Strip 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 Precision Strip — questions buyers ask
What thicknesses are available?
Commonly 0.05 – 1.5 mm, with hardness from annealed to full hard.
Which standard covers SS 321 precision strips?
The material is ASTM A240; dimensions follow ASTM A666 / A480. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a SS 321 precision strip?
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