China Coated Aluminum Sheet

China coated aluminum sheet is widely used in building envelopes, signage, transportation, and appliance panels because it combines light weight, corrosion resistance, and stable decorative performance. From a production technicians view, a good coated sheet is not only about a bright surfaceits the balance of substrate selection, pretreatment, coating chemistry, curing control, and packaging discipline that determines whether the material performs after fabrication and years of outdoor exposure.

Main specifications you should confirm before ordering

When sourcing China coated aluminum sheet for export projects, I always recommend locking down specifications in four layers: substrate, coating, dimensions, and performance standards.

1) Substrate alloy & temper (foundation of formability)

Common aluminum alloys for coated sheet include:

• AA1050/1060: high purity, good corrosion resistance, used for general cladding, insulation jacketing, and simple forming.

• AA3003: the workhorse for roofing, cladding, and general fabricationgood strength and forming balance.

• AA5005: preferred for higher-end architectural appearance consistency and better anodizing compatibility (even though this is painted, the base quality still matters).

Typical tempers:

• H14/H24 for sheet that needs moderate stiffness.

• H18 when higher hardness is needed (but watch bending radius).

• O (annealed) for deep drawing or tight bending.

2) Coating system (what your customer actually sees)

Most projects use either PE or PVDF coating:

• PE (polyester): cost-effective, good color range, suitable for indoor and moderate outdoor environments.

• PVDF (polyvinylidene fluoride): superior UV resistance, chalking resistance, and long-term color stabilitypreferred for curtain walls, long-life cladding, and demanding climates.

Coating structure often follows a primer + topcoat approach, and the back side can be service coat or full system depending on application. If you are comparing suppliers, ask whether the coating is single coat, 2-coat (primer + topcoat), or 3-coat architecture grade.

3) Thickness, width, and coating thickness

Typical ordering ranges in export trade:

• Metal thickness: ~0.203.00 mm (common building panels 0.501.50 mm)

• Width: 1000 / 1200 / 1250 mm (custom slitting available)

• Length: sheet cut-to-length or supplied as coil then leveled

• Coating thickness (dry film): commonly topcoat 1525 m for PE, topcoat 2030 m for PVDF, with primer typically ~510 m depending on system

4) Color, gloss, and surface finish

Coated aluminum sheet is often specified by RAL, Pantone, or customer samples. Key options include:

• High / medium / matte gloss

• Solid, metallic, pearlescent

• Textures (orange peel, brushed-like effects)

For large faade projects, request batch control and E color tolerance guidance, because coating line conditions and pigment lots can shift appearance if not managed.

Features that define reliable China coated aluminum sheet

Stable adhesion and bend performance

In production, adhesion is mainly won at the pretreatment stage (cleaning, conversion coating) and protected by proper cure temperature/time. For fabricators, practical indicators are:

• No peeling during T-bend or tight forming

• Good resistance to edge cracking when the temper is correctly matched

Corrosion resistance from system thinking

Corrosion resistance is not only the topcoat. It includes:

• Substrate quality (surface cleanliness, low defects)

• Pretreatment consistency

• Primer selection

• Edge protection and sealing strategy after installation

In coastal or high-humidity regions, PVDF plus robust pretreatment generally offers better long-term stability.

Workability for common fabrication routes

A well-made coated sheet should support:

• Roll forming (roofing, wall panels)

• Press bending, folding, and light stamping

• Riveting and mechanical fastening

• Controlled adhesive bonding (when surface energy requirements are respected)

If the project involves frequent forming, choosing AA3003 with an appropriate temper is often a safer path than pushing hardness too high.

Advantages compared with other cladding materials

• Lower weight than steel at similar coverage, reducing structural load and easing installation.

• Color consistency and design flexibility versus post-painting at site.

• Faster throughput for OEMs and contractors because precoated material reduces finishing steps.

• Lifecycle value: PVDF systems deliver strong outdoor durability, minimizing repainting and appearance complaints.

For product selection, it helps to compare both sheet and coil options. Many customers start from coil to maximize yield and profile forming efficiency; if you need that route, our Coated Aluminum Coil pages explain common coil-based supply practices and specifications.

Applicable scenarios (where coated aluminum sheet performs best)

Architectural & building envelope

• Curtain wall panels, faade cladding

• Roofing and wall panels

• Soffits, ceilings, canopies

For architectural-grade projects, PVDF is frequently specified to protect color and gloss over long exposure cycles. If you are evaluating finished sheet supply for panel fabrication, the Coated Aluminium Sheet range is typically aligned with these processing needs.

Signage, display, and storefront systems

• Sign boards, light boxes, decorative panels

• Interior feature walls where appearance matters and weight must stay low

Appliances and industrial enclosures

• Appliance outer panels, cabinet skins

• Electrical enclosures and equipment covers (when aesthetics plus corrosion resistance are required)

Transportation and modular construction

• Interior and exterior decorative skins in trailers, caravans, modular units

• Lightweight paneling where easy handling improves assembly efficiency

Production insights that protect your shipment quality

From the shop-floor side, the most common export issues are not paint vs. paint, but details: inconsistent curing, poor packing, and uncontrolled handling scratches.

• Curing control: stable peak metal temperature improves hardness, adhesion, and solvent resistance.

• Film protection: choose protective film type based on forming needs; too aggressive adhesive can leave residue, too weak can fail during transit.

• Packaging: moisture protection, edge guards, and pallet rigidity reduce transport dents and edge damageespecially for cut sheets.
  
  

When China coated aluminum sheet is specified with the right alloy/temper, a suitable PE or PVDF system, and clear performance targets (bend, adhesion, and corrosion expectations), it becomes a highly reliable material for both decorative and functional projects across building, industrial, and OEM markets.