Our commercial and structural-grade prepainted galvanized steel coil delivers precise thickness configurations, premium hot-dip zinc coating substrates, and elite multi-layered paint adhesion. Manufactured meticulously under ISO-certified processes since 1994, these color-coated GI coils provide incredible ductility for deep drawing, roll forming, and structural fabrication.
When engineering large-scale industrial complexes, cold storage facilities, or regional infrastructure projects, material compliance and absolute consistency are non-negotiable. Authentic Steel, acting as the premium international export division of Winroad Group based in Tianjin, has built its global industry reputation over the past three decades on delivering top-tier prepainted galvanized steel coil that completely aligns with strict global standards. Our advanced automated manufacturing lines provide global buyers with continuous coils that combine tight thickness tolerances, verifiable zinc weights, and flawless paint chemistry.
The core foundation of every prepainted galvanized steel coil we produce relies on meticulously processed cold-rolled steel substrates. We control the mechanical properties of our material to fulfill specific processing requirements, ranging from standard commercial lock-forming grades to complex deep-drawing qualities. Our hot-dip galvanizing stage applies uniform zinc crystals across the steel strip, with zinc weights customizable from 30g/m² up to an impressive 600g/m². This protective zinc layer forms an impenetrable barrier that safeguards the structural steel base against moisture, rainfall, and mechanical impacts during transport and processing.
| Parameter Item | Technical Specifications & Range |
| Product Name | Prepainted Galvanized Steel Coil (PPGI) |
| Standard Compliance | ASTM A755, EN 10169, JIS G3312, GB/T 13448 |
| Available Thickness | 0.085mm - 1.4mm |
| Available Width | 900mm - 1250mm (Custom slit width available) |
| Top Coating Layer | 15um - 35um (Primer + Finish coat) |
| Back Coating Layer | 5um - 20um (Epoxy or Polyester backer) |
| Paint Coating Formula | PE, Silicon Modified Polyester (SMP), HDP, PVDF |
| Finish Visual Options | Regular Gloss, High-Gloss, Matte, Wood/Brick Patterns |
Surface preparation represents the critical factor determining long-term coating adhesion. At Authentic Steel, the zinc-coated substrate undergoes a multi-step chemical pre-treatment process. We apply precision chrome-free passivation layers to guarantee absolute paint cross-linking. Our baking lines apply a double-coat, double-bake system. The top paint thickness ranges from 15um to 35um, combined with a specialized reverse-side backing paint measuring 5um to 20um. This complex composite layer provides phenomenal chemical resistance, safeguarding your finished products against peeling even when subjected to intense structural deformation or high-speed machinery processing.
Quality verification at Authentic Steel is comprehensive and fully transparent. Our standard factory quality inspection protocol tracks every production batch. We utilize computerized spectrophotometers to guarantee perfect color uniformity against your target RAL code, perform strict impact testing to ensure metal ductility, and execute cross-hatch tape tests to verify absolute paint adhesion. We export our certified steel coils to 78 countries across the globe, packing each order in fully protected, heavy-duty seaworthy metal casings. Reach out to our professional sales engineers in Tianjin today to receive an accurate, competitive quote for your precise project specifications.
Company Name: Authentic Steel
Email: bella@authsteel.com / bella@wanlusteel.com
Mobile/Tel/Whatsapp: +86 189 2041 0870
