SS 904L Mirror No.8 Finish Sheet
ASTM A240 · ASTM A480 (No.8) · Manufacturer, trader & exporter, India
Alloy 904L · UNS N08904
An SS 904L mirror no.8 finish sheet is sheet polished to a mirror surface, made from SS 904L to ASTM A240. No.8 mirror is polished and buffed for signage, décor and cleanroom surfaces.
See the SS 904L sheet grade form page for standards and sizes.
- ASTM A240
- ASTM A480 (No.8)
- EN 10204 3.1 / 3.2 as specified in the PO
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is an SS 904L Mirror No.8 Finish Sheet?
- What it is
- Sheet polished to a mirror surface
- Material
- ASTM A240
- Dimensions
- ASTM A480 (No.8)
- Grade
- SS 904L · UNS N08904
- Best at
- Dilute sulphuric acid, phosphoric acid and chloride-bearing cooling water
SS 904L Mirror No.8 Finish Sheet Specification
| Product | SS 904L Mirror No.8 Finish Sheet |
|---|---|
| Material standard | ASTM A240 |
| Dimensional standard | ASTM A480 (No.8) |
| Thickness | 0.3 mm to below 4.76 mm |
| Size | 1000 / 1219 / 1250 / 1500 × 2000 / 2438 / 2500 / 3000 mm or cut |
| 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 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 904L Mirror No.8 Finish Sheet: Why 904L for mirror no.8 finish sheets
No.8 mirror is polished and buffed for signage, décor and cleanroom surfaces. In SS 904L, 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 904L is picked for dilute sulphuric acid, phosphoric acid and chloride-bearing cooling water. |
|---|---|
| Typical service | Sulphuric acid plants — Coolers, piping and tanks for dilute sulphuric acid. |
| Matching filler | ER385 (AWS A5.9) |
SS 904L Mirror No.8 Finish Sheet Chemical Composition
| Element | Weight % (ASTM A240) |
|---|---|
| Nickel | 23.0–28.0 |
| Chromium | 19.0–23.0 |
| Molybdenum | 4.0–5.0 |
| Copper | 1.0–2.0 |
| Carbon | ≤0.020 |
| Manganese | ≤2.00 |
| Silicon | ≤1.00 |
| Nitrogen | ≤0.10 |
| Phosphorus | ≤0.045 |
| Sulphur | ≤0.035 |
| Iron | Balance |
Chemical composition per ASTM A240 for UNS N08904 (SS 904L). Confirm the edition named on your purchase order.
SS 904L Mirror No.8 Finish Sheet 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 N08904 — Annealed plate & sheet.
Full chemistry, properties and equivalents are on the SS 904L grade page.
Other SS 904L sheets
SS 904L 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 904L 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 904L 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 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