PPGL (Pre-Painted Galvalume Steel Coil), also known as Pre-Painted aluminum and galvanized steel coil, is usually supplied in coils and sheets and can be processed by bending, stamping, punching, forming, slitting, and profiling. PP means prepainted, and GL means galvanized steel, a composite metal material pre-painted based on GL coils.
PPGL Material Composition
The structure of PPGL typically consists of a steel substrate, an aluminized zinc layer, and an organic coating. The zinc-alumina layer, consisting of aluminum, zinc, and silicon, provides corrosion protection, while the organic coatings (e.g., polyester, fluorocarbon, silicone-modified polyester, high-weathering polyester, etc.) enhance weathering and aesthetics.
- Substrate: Aluminum-zinc-coated steel sheet (55% aluminum, 43.4% zinc, 1.6% silicon).
- Coating: Primer + Topcoat + Back (common coating types: epoxy, polyester, fluorocarbon, silicone-modified polyester, high weathering polyester, etc.).
PPGL Coil and Sheet Specifications
Wanzhi Group produces and sells PPGL products in the 0.12-1.5mm thickness range and 600-1250mm width range, including PPGL coils, PPGL sheets, PPGL corrugated, PPGL roofing, and PPGL strips. The products are available in a wide variety of colors and shapes.
| Grades | DX51/52/53/54D+Z, S280GD+Z, S350GD+Z, S550GD+Z, SECC, etc. |
|---|---|
| Colors | Top/Back：RAL，Painted steel，3D Painted steel, etc(can be customized) |
| Thickness | 0.12-1.5 mm |
| Width | 600-1250mm/ customized |
| Coil Weight | 3-6 tons/ customized |
| Substrate Type | Hot dip galvanized, Galvalume, Zinc alloy, Cold rolled steel, Aluminum-zinc plated steel，Zimalium |
| Zinc Coating Thickness | Z30-275g/ ㎡,AZ30-150g/ ㎡ |
| Introduction to Coating | PVDF、HDP、SMP、PE |
| Coating Thickness | Top ：10-40 um，Back：5-20 um |
| Inside diameter | 508/610mm |
| Package | Standard export package or as per your requirements |
| Certificates | SGS, ISO 9001,CE |
| Date of Delivery | 5-45 days |
PPGL Material Features
PPGL material combines the corrosion resistance of zinc-aluminum sheet substrates with the decorative/functionality of coatings and is an upgrade to PPGI (pre-painted galvanized steel).
PPGL Material Applications
PPGL material has the advantages of salt spray resistance, typhoon resistance, high-temperature resistance, easy to clean, high-temperature oxidation resistance, electromagnetic shielding, weather resistance, low maintenance cost, ammonia corrosion resistance, moisture resistance, etc. It is a high-quality metal material for architectural, industrial, energy, and agricultural applications in different environments.
- Construction: Coastal roofing, industrial wall panels, sun shades, etc.
- Appliances: oven and microwave housings.
- Automotive: doors, roofs, exhaust heat shields, and battery housings for new energy vehicles.
- New energy: photovoltaic racks, charging pile shells.
- Agriculture: greenhouse skeleton, farm roofs
- Transportation: road signs, guardrail, bridge guardrail
- Education: Writing Board
PPGL Material Process
The PPGL steel production process includes: hot-dip galvalume steel production, coating, curing, cooling, cutting, and quality control.
- Substrate pre-treatment: degreasing → pickling → passivation.
- Aluminum-zinc plating process: hot-dip galvanizing of aluminum-zinc alloys.
- Coating: Roller primer → topcoat → backcoat.
- Curing and molding: Baking.
- Further Processing: Curling into rolls or processing into different sizes of sheets and profiles as required.
- Testing and Packaging: Surface effect, coating quality, coating adhesion, salt spray resistance, color difference testing.
PPGL International Standards and Certifications
As a professional PPGL steel supplier, Wanzhi Group provides customers all over the world with pre-painted steel products that comply with international standards such as JIS, EN, ASTM, ISO, etc. Meanwhile, we also support third-party inspections such as SGS, BV, and so on.
Base material standard: ASTM A792 (USA), EN 10346 (Europe), JIS G 3321 (Japan).
Coating standard: ASTM D823 (coating uniformity), ISO 12944 (corrosion resistance grade C5-M).
Environmental certification: LEED (green building), RoHS (no harmful substances).
PPGL PPGI PPAL Colored Stainless Steel Comparison
PPGL, PPGI, PPAL, and Colored Stainless Steel are popular colored metal materials, of which PPGI is economical and practical for short-term or dry environment projects; PPGL: is the king of cost-effective, preferred for harsh environments; PPAL: is lightweight and aesthetically pleasing, suitable for decorative scenarios; Colored Stainless Steel: high end and weather resistant, is a standard for luxury and permanent projects.
| Property | PPGI | PPGL | PPAL | Colored Stainless Steel |
|---|---|---|---|---|
| Full Name | Pre-painted galvanized steel | Pre-painted galvalume steel | Pre-painted aluminum | Colored stainless steel |
| Base Material | Galvanized steel | Galvalume steel | Aluminum | Stainless steel |
| Corrosion Resistance | Medium | Excellent | Very Strong | Extremely Strong |
| Tensile Strength (MPa) | 270-550 | 300-600 | 100-300 | 520-860 |
| Density (g/cm³) | 7.85 | 7.85 | 2.7 | 7.9-8.0 |
| Heat Reflectivity | Low | Excellent | Very Excellent | Average |
| Weight | Heavy | Heavy | Light | Heavy |
| Cost | Low | Medium | Medium | High |
| Processability | Easy to press/bend | Requires special tools | Easy to mold | High hardness, requires laser cutting |
| Applications | Architecture, Appliances | Construction, Home Appliances, Automotive, Agriculture | Building Exterior, Roofing, Decorative Panels | High-end Architecture, Decorative Panels, Tableware |
PPGL Factory Suppliers
Purchasing from the PPGL factory can get more competitive prices and reliable quality products, the factory can achieve quality control, cost optimization space, and supply chain reliability, while ensuring product quality and reducing costs.
PPGL Factory Inspection Assessment Focus
Raw material warehouse: no rust stains, clear batch labeling
Galvanizing Line: Uniform coating without leakage.
Coating line: no air bubbles or orange peel on the coating
Test room: The test report corresponds to the production lot.
Wanzhi PPGL Factory
Certificates: ISO 9001, ISO 14001, ASTM A792, EN 10346, GB/T 14978, etc.
Capacity: 600,000 tons per year.
Lead Time: 5–45 days
Lines: 2 galvanized lines, 3 color-coated lines, 1 alloy coated steel line.
PPGL Products Customization
Wanzhi Group offers customized PPGL steel solutions and finished products. You can choose the substrate, color, texture, tint, paint, varnish, surface treatment, finishing, etc. according to your project location.
- Color: RAL color card
- Texture: Wood grain, stone grain
- Gloss: High-gloss / Matte
- Paints: epoxy resins, polyester PE, fluorocarbon PVDF, silicone-modified polyester SMP, high-weathering polyester HDP, PVC, PU, etc.
- Film: Topcoat 10–40 microns, Primer 5–20 microns.
- Finished products: PPGL Roofing Panel/Wall Panel/Sandwich Panel/Floor Slab/Piping System/Steel Structure/Steel Strip, etc.
PPGL material is designed with the double protection of “Aluminum Zinc Plated Substrate + Organic Coating”, which is significantly better than traditional galvanized material (e.g. PPGI) in terms of corrosion resistance, high-temperature resistance, and decorative properties. If you are looking for color-coated steel suitable for coastal, industrial polluted areas and high-temperature scenarios, then PPGL is the ideal choice for you!