SS 321 Hairline Finish SheetASTM A240 · Mill / trade finish · Manufacturer, stockist & exporter, India
AISI 321 · UNS S32100
An SS 321 hairline finish sheet is sheet brushed with long continuous lines, made from SS 321 to ASTM A240. Hairline (HL) finish gives long unbroken brush lines for lift doors, façades and interiors.
- ASTM A240
- Mill / trade finish
- 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 Hairline Finish Sheet?
- What it is
- Sheet brushed with long continuous lines
- Material
- ASTM A240
- Dimensions
- Mill / trade finish
- Grade
- SS 321 · UNS S32100
- Best at
- High-temperature service between 425 and 815 °C
SS 321 Hairline Finish Sheet Specification
| Product | SS 321 Hairline Finish Sheet |
|---|---|
| Material standard | ASTM A240 |
| Dimensional standard | Mill / trade finish |
| Thickness | Below 4.76 mm (3/16") |
| Size | 1000 / 1219 / 1250 / 1500 × 2000 / 2438 / 2500 / 3000 mm or cut |
| Testing | PMI · dimensional · NDT and IGC on request |
| Documents | EN 10204 3.1 · 3.2 with third-party inspection |
When to Choose a Hairline Finish Sheet
Hairline (HL) finish gives long unbroken brush lines for lift doors, façades and interiors.
- Continuous long lines
- Decorative
- PVC film protection
More on choosing: Hairline finish sheet guide.
SS 321 Hairline Finish Sheet: Why 321 for hairline finish sheets
Hairline (HL) finish gives long unbroken brush lines for lift doors, façades and interiors. 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 sheet is formed and finished for visible or hygienic surfaces. SS 321 is picked for high-temperature service between 425 and 815 °C. |
|---|---|
| Typical service | Aircraft exhaust — Manifolds, bellows and exhaust systems. |
| Matching filler | ER347 (AWS A5.9) |
SS 321 Hairline Finish Sheet Chemical Composition
| Element | Weight % |
|---|---|
| Chromium | 17.0 – 19.0 |
| Nickel | 9.0 – 12.0 |
| Titanium | 5 × (C + N) min, 0.70 max |
| Carbon | 0.08 max |
| Manganese | 2.00 max |
| Silicon | 0.75 max |
| Nitrogen | 0.10 max |
| Phosphorus | 0.045 max |
SS 321 Hairline Finish Sheet Mechanical Properties
| Annealed plate & sheet | Value |
|---|---|
| Tensile strength | 515 MPa · 75 ksi |
| Yield strength 0.2% | 205 MPa · 30 ksi |
| Elongation | 40% |
| Hardness | 217 HB max |
Full chemistry, properties and equivalents are on the SS 321 grade page.
Other SS 321 sheets
SS 321 Hairline Finish Sheets for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiSS 321 Hairline Finish Sheet — questions buyers ask
Hairline or No.4?
Hairline has longer, continuous lines; No.4 has shorter brush marks.
Which standard covers SS 321 hairline finish sheets?
The material is ASTM A240; dimensions follow Mill / trade finish. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a SS 321 hairline finish sheet?
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 mill certificates as standard, 3.2 with third-party inspection on request, plus dimensional and PMI reports.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026