SS 304L Mirror No.8 Finish SheetASTM A240 · ASTM A480 (No.8) · Manufacturer, stockist & exporter, India
AISI 304L · UNS S30403
An SS 304L mirror no.8 finish sheet is sheet polished to a mirror surface, made from SS 304L to ASTM A240. No.8 mirror is polished and buffed for signage, décor and cleanroom surfaces.
- ASTM A240
- ASTM A480 (No.8)
- EN 10204 3.1 / 3.2
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is an SS 304L Mirror No.8 Finish Sheet?
- What it is
- Sheet polished to a mirror surface
- Material
- ASTM A240
- Dimensions
- ASTM A480 (No.8)
- Grade
- SS 304L · UNS S30403
- Best at
- Welded tanks, piping and vessels in general corrosive service
SS 304L Mirror No.8 Finish Sheet Specification
| Product | SS 304L Mirror No.8 Finish Sheet |
|---|---|
| Material standard | ASTM A240 |
| Dimensional standard | ASTM A480 (No.8) |
| 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 Mirror No.8 Finish Sheet
No.8 mirror is polished and buffed for signage, décor and cleanroom surfaces.
- True mirror
- Polished and buffed
- Laser-film protected
More on choosing: Mirror No.8 finish sheet guide.
SS 304L Mirror No.8 Finish Sheet: Why 304L for mirror no.8 finish sheets
No.8 mirror is polished and buffed for signage, décor and cleanroom surfaces. In SS 304L, 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 304L is picked for welded tanks, piping and vessels in general corrosive service. |
|---|---|
| Typical service | Process piping — Welded lines in chemical and pharma plants. |
| Matching filler | ER308L (AWS A5.9) |
SS 304L Mirror No.8 Finish Sheet Chemical Composition
| Element | Weight % |
|---|---|
| Chromium | 17.5 – 19.5 |
| Nickel | 8.0 – 12.0 |
| Carbon | 0.030 max |
| Manganese | 2.00 max |
| Silicon | 0.75 max |
| Nitrogen | 0.10 max |
| Phosphorus | 0.045 max |
| Sulphur | 0.030 max |
SS 304L Mirror No.8 Finish Sheet Mechanical Properties
| Annealed plate & sheet | Value |
|---|---|
| Tensile strength | 485 MPa · 70 ksi |
| Yield strength 0.2% | 170 MPa · 25 ksi |
| Elongation | 40% |
| Hardness | 201 HB max |
Full chemistry, properties and equivalents are on the SS 304L grade page.
Other SS 304L sheets
SS 304L Mirror No.8 Finish Sheets for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiSS 304L Mirror No.8 Finish Sheet — questions buyers ask
How is mirror finish protected?
With a laser-grade PVC film that stays on until installation.
Which standard covers SS 304L mirror no.8 finish sheets?
The material is ASTM A240; dimensions follow ASTM A480 (No.8). Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a SS 304L mirror no.8 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