Authentic Steel is the export department of Winroad Group and a professional manufacturer and exporter of galvanized steel coils (GI). From our production hub in Tianjin, China, we supply zinc-coated steel coils to solar mounting structure fabricators, marine infrastructure engineers, agricultural equipment builders, and steel distributors in 78+ countries. We provide mill-direct pricing, custom processing, and rapid export dispatch through Tianjin Port. Our high zinc coils can be supplied to international specifications on request.
According to our company brochure, galvanized steel coils are available with zinc coating from 30 g/m² to 600 g/m². Heavy zinc coating is suitable for humid, marine, and industrial environments requiring long-term corrosion protection. Specific coating designations such as Z275–Z600 are available on request. Please share your target environment, coating weight, and service life so we can recommend a suitable specification.
Thickness: 0.1–3.5 mm
Width: 870–1250 mm
Zinc coating: 30–600 g/m²
Coil weight: 3–24 MT
Coil inner diameter: 508 / 610 mm
Spangle: Big / Regular / Small / Zero Spangle
Surface treatment: chromated, oiled, anti-fingerprint, skin-passed, or dry available on request
Steel grades: available on request
Standards: EN, ASTM, JIS, GB available on request
Custom slitting and cut-to-length processing are available on request. Please share your required thickness, width, coating weight, surface treatment, and application.
High zinc galvanized coils are suitable for demanding environments such as:
Solar photovoltaic mounting systems: ground-mount channels, tracker rails, mounting legs, and torque tubes
Coastal and marine infrastructure: seaport cladding, marine guardrails, fencing, bridge decking, and offshore support structures
Agricultural facilities and silos: grain storage silos, livestock enclosures, poultry equipment, and greenhouse frames
Heavy industrial construction: C/Z purlins, cable trays, power distribution enclosures, and chemical plant roofing panels
General outdoor structures requiring extended corrosion protection
Authentic Steel supports custom processing for project-specific requirements:
Precision slitting into narrow galvanized strips
Cut-to-length galvanized sheets
Tension leveling and surface protection
PE film lamination available on request
Custom packing and mixed container loading available on request
Every batch undergoes inspection, including zinc coating thickness measurement, bend tests, tensile strength verification, and surface checks. Salt spray corrosion testing is available on request. A Mill Test Certificate (MTC) can be supplied on request, and third-party inspection is available on request.
To reduce white rust, moisture damage, and edge deformation during ocean transport, our galvanized coils use multi-layer export packaging: rust-inhibiting VCI paper, plastic moisture barriers, galvanized steel outer casing, metallic corner protectors, and heavy radial and circumferential steel banding on heat-treated wooden skids. This packaging is suitable for long-distance container shipment and safe unloading.
Mill-direct supply and competitive pricing
Stable quality control from raw material to final packing
Export experience to 78+ countries
Custom slitting and cut-to-length processing on request
Fast dispatch from Tianjin Port
Technical support, datasheets, and MTC samples available
Contact our engineering sales team for factory-direct quotations, technical datasheets, MTC samples, or custom project quotes. Please share your required thickness, width, zinc coating, surface treatment, and destination port.
AUTHENTIC STEEL
Email: alice@authsteel.com
Mobile / Tel / WhatsApp: +86 137 8227 9845
