Three Coating Lines. One Factory
We run hot-dip metal coating, continuous color coating and film lamination lines in the same plant โ plus slitting, cut-to-length, roll forming, embossing, punching and protective film. You order a finished coil or sheet; we handle everything from raw substrate to container loading. Wanzhi Steel Factory is located in Boxing, Shandong. It was established in 2011. [READ MORE]
Production Lines
Each line is a continuous process โ cleaning, coating, curing and winding. No batch processing, no hand application. Consistent quality from the first coil to the last.
Metal Coating Steel Line
Continuous hot-dip galvanizing and galvalume line. The process: uncoiling โ welding โ cleaning โ annealing โ zinc / Al-Zn pot โ air knife control โ cooling โ recoiling. Produces bare GI and GL substrate that we either sell as-is or feed directly to our color coating line.
Color Coated Steel Line
Pre-painted line with 5-stage cleaning, chemical treatment, primer and topcoat. Coating curing oven is temperature-controlled to ยฑ5ยฐC. We run RAL standard colors daily and custom colors on order. Available finishes: smooth, matte, embossed and printed.
VCM Laminated Steel Line
PET and PVC film laminated onto galvanized or galvalume substrate under heated rollers. The result is a decorative, scratch-resistant panel used for refrigerator liners, washing machine shells, elevator interiors and wall cladding. Wood grain, marble and solid color films available.
Product Range & Specifications
Everything we manufacture, in one table. Send us the grade, coating, color and dimensions you need โ we’ll match it to our line capacity.
| Product | Substrate | Coating / Finish | Thickness | Width | Common Applications |
| GI Steel Coil(Hot-Dip Galvanized) | DX51D / SGCH / CS Type A,B,C… | Z30 โ Z275 | 0.12 โ 4.0 mm | 600 โ 1250 mm | Roofing, pipe, ducting |
| GL / Aluzinc Steel Coil(Galvalume / 55% Al-Zn) | DX51D / S280GD / SGCC… | AZ30 โ AZ150 | 0.12 โ 4.0 mm | 600 โ 1250 mm | Roofing, siding, automotive |
| ZAM Steel Coil(Zn-Al-Mg Alloy Coated) | DX51D / S350GD / S550GD… | ZM70 โ Z350 | 0.2 โ 2.0 mm | 600 โ 1250 mm | Appliances, solar brackets |
| PPGI Steel Coil(Pre-Painted Galvanized) | GI (Z30 โ Z275) | PE / SMP / HDP / PVDF | 0.12 โ 1.2 mm | 600 โ 1250 mm | Wall panels, doors, roofing |
| PPGL Steel Coil(Pre-Painted Galvalume) | GL (AZ30 โ AZ150) | PE / SMP / HDP / PVDF | 0.12 โ 1.2 mm | 600 โ 1250 mm | Roofing, facades, industrial |
| PCM Steel Sheet(Pre-Coated Metal) | GI / GL substrate | Primer + topcoat, appliance grade | 0.3 โ 1.0 mm | 600 โ 1250 mm | Refrigerators, washing machines |
| VCM Laminated Steel(Vinyl Coated Metal) | GI / GL substrate | PET / PVC film lamination | 0.3 โ 1.0 mm | 600 โ 1250 mm | Appliance panels, elevator interiors |
| Printed Steel Coil(Decorative Pattern) | GI / GL / PPGI substrate | Printed + protective film | 0.2 โ 1.0 mm | 600 โ 1250 mm | Interior doors, wall cladding, furniture |
Available Printed Patterns
Wood Grain / Wood Pattern
Oak, walnut, cherry and custom wood tones. Used for interior doors, wardrobe panels and wall cladding.
Marble / Stone Pattern
White marble, gray granite and beige stone looks. Lightweight alternative to natural stone for interiors.
Brick / Flower / Traffic & Custom
Brick pattern, floral designs, traffic warning patterns and custom prints. Send your artwork for custom runs.
In-House Processing Services
We source the raw substrate and process it to your exact dimensions. You don’t need a separate slitter or processor โ we do it all on site.
| Process | What We Do | Capacities |
| Slitting | Split a wide mother coil into narrow strip coils to your specified width. Common for pipe mills, tube mills and roll forming lines. | Min. 20 mm width Tolerance ยฑ0.1 mm |
| Cut-to-Length | Cut coil into flat sheets of exact length. Leveled and squared โ ready for roofing, siding or fabrication. | Length: 1โ12 m Tolerance ยฑ2 mm |
| Roll Forming | Form sheets into corrugated, trapezoidal or custom profiles. Produces finished roofing and wall panels straight from our line. | Profiles: 60+ types Custom die available |
| Embossing | Press diamond, chequer or custom patterns into the surface. Anti-slip and decorative embossing available on GI, GL and PPGI. | Patterns: diamond, chequer Custom roll available |
| Punching / Perforating | Punch holes or perforate sheets to your layout. Used for acoustic panels, louvers, mesh panels and custom ventilation parts. | Hole dia: 3โ50 mm Custom pattern on request |
| Protective Film Lamination | Apply PE or PVC protective film on painted surfaces to prevent scratches during transport and installation. Peel off after installation. | Film: PE / PVC Thickness: 50โ120 micron |
Strict Quality Control
Every order goes through this checklist before it’s released. Our QC team signs off on each coil โ no QC, no shipment.
Dimensional Measurement
Digital calipers and micrometers are used to check the thickness of each coil edge to ensure specifications meet customer requirements. Width and inner diameter (508/610 mm) conform to order specifications.
Coating Weight Test
A coating thickness gauge measures the weight of zinc, aluminum, and paint coatings at the left, center, and right edges. Results are recorded and provided to the customer in real time.
Surface Visual Inspection
A comprehensive surface inspection is conducted on raw materials and finished steel coils. Scratches, color consistency, coating unevenness, edge defects, and rust spots are checked. Any coils that do not meet standards are isolated.
Mill Test Certificate (MTC)
Each shipment includes the original MTC from the steel production lineโconfirming material grade, chemical composition, mechanical properties, and coating weight.
Inside Our Factory
Real photos from our production workshops, warehouses, and loading/unloading areas. These are the latest photos of our production facilities. You will see these when you visit.
Production Video
Packaging & Export Loading
We use standard airworthy export packaging, and can also customize packaging according to your requirements; we have partnered freight companies and have safely delivered steel to 120 countries.
The inner layer is wrapped in waterproof kraft paper and plastic film to block moisture during sea transport.
The outer steel plate provides impact protection during loading and unloading.
Steel edge guards are installed on both sides to prevent edge damage during forklift handling.
Radial and circular steel straps firmly secure the coilโpreventing loosening of the winding during transport.
It is mounted on a wooden pallet for easy forklift handling at the destination.
When loading containers, the coil is secured with straps to prevent displacement.
