ASTM A240 SS 304 Mirror Finish Sheet PVC Coating Polished Stainless Steel Mirror Sheet
Our SS 304 Mirror Finish Sheets (also known as No. 8 Finish or 8K Finish) are produced by polishing standard 2B or BA stainless steel sheets to achieve a highly reflective, mirror-like surface. The clarity and reflectivity are comparable to a glass mirror.
The base material is ASTM A240 Grade 304 stainless steel, which provides excellent corrosion resistance and formability. The ultra-smooth, glossy surface not only delivers aesthetic brilliance but also offers low dirt adhesion and easy cleaning – making it the preferred choice for both decorative and functional applications.
Product Aliases: No. 8 finish sheet, 8K mirror sheet, reflective stainless steel sheet, decorative stainless steel sheet.
We offer a full range of standard and custom sizes. All dimensions conform to ASTM A480.
| Parameter | Options / Range |
|---|---|
| Standard | ASTM A240, JIS G4304, EN 10088, GB/T 3280 |
| Grade | 304 (UNS S30400), 304L, 316 (available upon request) |
| Thickness | 0.4mm – 3.0mm (sheet) / 0.4mm – 1.5mm (coil) |
| Width | 1000mm, 1219mm, 1250mm, 1500mm (customizable up to 2000mm) |
| Length | 2000mm, 2438mm, 2500mm, 3000mm (customizable) |
| Surface Finish | No. 8 / 8K Mirror Finish (Ra ≤ 0.05µm) |
| Backing Protection | PVC film (white, blue, clear; standard or low-tack) |
| Tolerance | Thickness: ±0.05mm / Width & Length: ±2mm |
Strict composition control ensures consistent reflectivity after polishing.
| Element | C | Si | Mn | P | S | Ni | Cr |
|---|---|---|---|---|---|---|---|
| 304 | ≤0.08 | ≤0.75 | ≤2.00 | ≤0.045 | ≤0.030 | 8.0–10.5 | 18.0–20.0 |
| Property | Value |
|---|---|
| Tensile Strength | ≥ 515 MPa (75 ksi) |
| Yield Strength (0.2% offset) | ≥ 205 MPa (30 ksi) |
| Elongation (in 50mm) | ≥ 40% |
| Hardness (Brinell, HB) | ≤ 201 |
| Hardness (Rockwell, HRB) | ≤ 92 |
To protect the mirror finish during transit and storage, we follow export-grade packing:
| Step | Description |
|---|---|
| 1. Interleaving | Kraft paper and foam paper between each sheet |
| 2. PVC Protection | White/blue PVC film on mirror side (low-tack, residue-free) |
| 3. Waterproofing | VCI paper + PE waterproof wrap |
| 4. Edge Protection | Cardboard or plastic edge protectors |
| 5. Bundling | Steel strapping on heavy-duty wooden pallets (heat-treated, ISPM-15 certified) |
| 6. Labeling | Mill test certificate number, grade, dimensions, and quantity |
✅ Shipping marks and handling instructions are clearly printed on each package.
- True Mirror Quality: Ra ≤ 0.05µm, no pinholes, no orange peel
- Consistent Base Metal: We use prime 304 cold-rolled coils from TISCO / BAOSTEEL / JISCO
- Damage-Free Delivery: Multi-layer export packing + wooden pallets
- Full Traceability: Mill test certificate (EN 10204 Type 3.1) for each batch
- Third-Party Inspection: SGS / BV / Intertek available upon request
Request a quote for your project quantity. We respond within 4 business hours.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.