Manufactured specifically for extreme marine and chemical environments, our heavy coating galvalume steel sheet in coils features high alloy mass specifications (AZ150 to AZ180). Provides up to 6 times the corrosion resistance of standard galvanized steel under aggressive atmospheric salt spray.
As the dedicated international export organization of Winroad Group, Authentic Steel manufactures maximum-durability heavy coating galvalume steel sheets in coils engineered specifically for severe marine climates, coastal infrastructure, agricultural livestock housing, and heavy chemical processing facilities. Operating near Tianjin Port with steel production experience dating back to 1994 and a commercial footprint reaching 78 countries worldwide, our advanced hot-dip galvalume lines deposit an increased aluminum-zinc coating mass ranging from AZ150 up to AZ185 (150 g/m² to 185 g/m² total dual-sided weight). This thick metallic alloy barrier delivers extended service life without red rust in humid, saline, or sulfurous industrial atmospheres.
Standard commercial light coatings often experience premature red rust along sheared edges when exposed to salt spray or acid rain. Our heavy coating galvalume coils integrate a dense 55% aluminum micro-dendritic lattice that seals the core steel substrate, while the concentrated zinc phase provides active cathodic protection along punched holes, sheared edges, and fastener penetrations. This dual-action electrochemical defense provides up to six times the longevity of standard galvanized sheets in aggressive coastal zones.
| Product Designation | Heavy Coating Galvalume Steel Sheet in Coils (Marine Grade) |
|---|---|
| Coating Mass Designation | AZ150, AZ165, AZ185 (55% Al + 43.4% Zn + 1.6% Si) |
| Thickness Profile | 0.40 mm – 2.50 mm (High structural stability) |
| Width Profile | 900 mm – 1250 mm or custom corrugated roofing widths |
| Salt Spray Endurance | > 1000 Hours Neutral Salt Spray (ASTM B117 compliance) |
| Surface Chemical Passivation | Chromated / Anti-Fingerprint Oiled Passivation |
| Coil Weight & Inner Diameter | 4 to 25 Metric Tons per coil; ID: 508 mm / 610 mm |
| Custom HS Code | 72106100 |
At Authentic Steel, heavy coating galvalume coils are verified through chemical weigh-strip-weigh methods, triple-spot coating mass analysis, and T-bend adhesion testing in our accredited quality control laboratory. We issue complete EN 10204 3.1 Mill Test Certificates with every shipment to ensure compliance with ASTM A792 and EN 10346 specifications. All coils feature seaworthy steel wrapping, outer steel edge rings, and heavy steel strapping on reinforced pallets for international maritime shipment.
Contact our export representatives in Tianjin today for official quotations, MTC documentation, and vessel shipment quotes.
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