5083 h116 3003 h19 polished mirror aluminium sheet
A 5083 H116 / 3003 H19 polished mirror aluminium sheet combines two widely trusted alloy/temper options with a high-reflectivity mirror finish to serve both structural durability and premium surface aesthetics. In practice, customers choose this product family for projects that need a clean, bright, "near-glass" appearance while still requiring predictable forming behavior, corrosion resistance, and stable flatness.
This product title typically represents two popular mirror-sheet routes:
- 5083-H116 mirror-polished sheet: marine-grade Al-Mg alloy, strain-hardened for excellent corrosion resistance (especially in seawater) and high strength for a non-heat-treatable alloy.
- 3003-H19 mirror-polished sheet: general-purpose Al-Mn alloy, cold-worked to a harder temper, valued for formability, low risk of cracking, and cost efficiency with a bright surface.
Both can be produced with a polished mirror finish for decorative and functional reflective uses (lighting, architecture, trim, interior panels, signage).
Features and Customer Benefits
| Feature | 5083 H116 Benefit | 3003 H19 Benefit |
|---|---|---|
| Mirror-polished surface | Premium look; improves reflectivity for marine/transport aesthetics | High brightness for signage, interior décor, light reflectors |
| Corrosion resistance | Excellent in marine and industrial atmospheres | Good in general environments; best for indoor/low-chloride exposure |
| Strength-to-weight | Higher strength for panels, enclosures, decks | Moderate strength; good for shaped decorative parts |
| Forming behavior | Good, but heavier forming radii recommended | Very good; suited to bending, roll forming, shallow drawing |
| Fabrication | Weldable (MIG/TIG); marine-friendly | Excellent for stamping/trim parts; brazing-friendly in some assemblies |
| Cost position | Typically higher | Typically more economical |
Mirror Finish: Performance Notes That Matter in Real Use
A "mirror" aluminum sheet is not just shiny-it is a surface-controlled product. Its value depends on:
- Reflectivity & image clarity: used for decorative panels, reflectors, and visual branding.
- Surface protection: mirror surfaces are sensitive to handling marks. Many suppliers deliver with PVC protective film (laser-cutting compatible options are common).
- Anodizing compatibility: both alloys can be anodized, but final appearance varies by alloy chemistry and polishing route. For critical visual matching, request production samples.
- Scratch sensitivity: mirror finish highlights micro-scratches; specify packaging, film type, and handling procedures early.
Alloy and Temper Explained (Selection Guidance)
5083-H116 (Marine Grade, High Corrosion Resistance)
- 5083 is an Al-Mg alloy known for strong performance in seawater and harsh coastal exposure.
- H116 temper is commonly used for marine plate and sheet, targeting good strength and stress-corrosion resistance characteristics compared with some higher-worked tempers.
Best when: corrosion resistance and strength are primary, especially in marine/corrosive locations.
3003-H19 (Workhorse Alloy, Good Formability)
- 3003 is Al-Mn alloy with excellent general corrosion resistance and very reliable fabrication behavior.
- H19 indicates a highly strain-hardened condition: stronger than soft tempers, while still workable for many bends and profiles (with correct radius).
Best when: decorative forming, cost control, and consistent production for indoor/general environments are key.
Chemical Composition (Typical Ranges)
Note: Exact limits can vary by applicable standard (ASTM/EN/JIS) and supplier practice. Confirm the mill test certificate (MTC) for your order.
5083 (Al-Mg)
| Element | Typical Range (%) |
|---|---|
| Mg | 4.0 – 4.9 |
| Mn | 0.4 – 1.0 |
| Cr | 0.05 – 0.25 |
| Si | ≤ 0.40 |
| Fe | ≤ 0.40 |
| Cu | ≤ 0.10 |
| Zn | ≤ 0.25 |
| Ti | ≤ 0.15 |
| Al | Balance |
3003 (Al-Mn)
| Element | Typical Range (%) |
|---|---|
| Mn | 1.0 – 1.5 |
| Cu | 0.05 – 0.20 |
| Si | ≤ 0.60 |
| Fe | ≤ 0.70 |
| Zn | ≤ 0.10 |
| Mg | ≤ 0.05 |
| Al | Balance |
Mechanical Properties (Typical, for Reference)
Mechanical values depend strongly on thickness, processing route, and standard. Use these as engineering guidance, not as guaranteed minimums unless specified on the certificate.
| Property | 5083-H116 (Typical) | 3003-H19 (Typical) |
|---|---|---|
| Tensile Strength (MPa) | 275 – 340 | 185 – 230 |
| Yield Strength (MPa) | 125 – 215 | 150 – 200 |
| Elongation (%) | 10 – 16 | 2 – 6 |
| Brinell Hardness (HBW) | ~75 – 90 | ~50 – 65 |
| Weldability | Excellent | Good (less common than 5xxx for structural welds) |
| Corrosion Resistance | Excellent (marine) | Good (general) |
Technical Specifications (Typical Supply Capability)
Specifications vary by mill and polishing line. The table below describes common order ranges customers request for mirror sheet.
| Item | Typical Options |
|---|---|
| Alloy / Temper | 5083-H116, 3003-H19 |
| Thickness | 0.5 – 6.0 mm (common mirror range: 0.6 – 3.0 mm) |
| Width | 1000 / 1220 / 1250 / 1500 mm (custom slit possible) |
| Length | 2000 / 2440 / 2500 / 3000 mm (cut-to-length available) |
| Finish | Polished mirror (single/both sides depending on order) |
| Protective film | PVC film (standard / laser film) |
| Flatness | Standard commercial / improved flatness options |
| Edge | Mill edge / trimmed edge |
| Standards | ASTM B209 (common), EN 485/573 (common), or per agreement |
Performance in Service: What to Expect
| Performance Metric | 5083-H116 Mirror Sheet | 3003-H19 Mirror Sheet |
|---|---|---|
| Outdoor durability | Very strong choice, especially coastal | Suitable for non-marine outdoor; best with coating/anodize |
| Salt spray exposure | Excellent base metal resistance | Moderate; requires protection in chloride-rich zones |
| Forming tolerance | Good, use larger bend radii | Very good for decorative profiles |
| Visual consistency | High with controlled polishing; alloy may show tone variation after anodize | Often excellent brightness; good for decorative matching runs |
| Maintenance | Clean with non-abrasive methods to protect mirror | Same; avoid harsh pads that haze surface |
Typical Applications (Where Customers Get the Best Value)
Architecture & Interior Design
- Lobby feature walls, columns, ceiling panels
- Elevator interiors, trims, decorative cladding
- Retail fixtures and high-end display panels
Why it works: mirror finish amplifies light and space; aluminum keeps weight low and installation simple.
Transportation & Marine
- 5083-H116: yacht interiors/exteriors trim panels, marine cabinetry faces, corrosion-resistant decorative covers
- Trailer panels, vehicle interior reflectors, accent panels
Why it works: 5083 provides peace of mind in humid/salt environments while keeping a high-end appearance.
Signage, Lighting, and Reflectors
- Light troughs, reflectors, LED channel reflectors
- Backlit signage components, high-brightness display surfaces
Why it works: high reflectivity improves light efficiency; polished aluminum is easier to cut and form than glass mirrors.
Equipment Covers and Decorative Enclosures
- Machine guards, cosmetic covers, appliance panels
- Cleanroom or lab aesthetics (with proper surface handling)
Fabrication Recommendations (To Preserve the Mirror)
| Process | Recommendation |
|---|---|
| Cutting | Use sharp tooling; protect surface with film; consider shear marks on mirror-critical edges |
| Laser cutting | Specify laser-grade film and confirm residue requirements |
| Bending | Use non-marring dies; larger radii for 5083; test bend direction on H19 |
| Welding | Prefer welding on non-visual side; protect mirror from spatter; post-clean carefully |
| Cleaning | Mild soap + microfiber; avoid abrasive pads and harsh alkaline/acid cleaners |
| Packaging | Interleaving paper/foam + corner protectors; avoid metal-to-metal rubbing |
How to Choose Between 5083-H116 and 3003-H19
| If you prioritize… | Choose |
|---|---|
| Marine/coastal corrosion resistance | 5083-H116 |
| Higher strength for thinner gauges | 5083-H116 |
| Easy forming for trims and profiles | 3003-H19 |
| Cost-effective decorative mirror sheet | 3003-H19 |
| Highest reliability in harsh atmospheres | 5083-H116 |
Ordering Checklist (Avoid Common Mistakes)
- Mirror on one side or both sides
- Required reflectivity / clarity level (request a sample standard)
- Protective film type (standard vs laser film)
- Thickness tolerance, flatness requirement
- Final finish: raw mirror, anodized, or coated
- Application environment: indoor, outdoor, marine, chemical exposure
- Acceptable minor defects criteria (hairlines, roll marks, pinholes) for mirror grade
The 5083 H116 / 3003 H19 polished mirror aluminium sheet category gives buyers two proven alloy paths to a premium reflective surface. Choose 5083-H116 when corrosion resistance and strength are non-negotiable-especially in marine or industrial atmospheres. Choose 3003-H19 for fast, cost-effective decorative fabrication with excellent forming behavior. In both cases, specifying surface protection, finish requirements, and fabrication method up front is the to receiving mirror sheet that looks as good in production as it does on arrival.
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