Authentic Steel is the export department of Winroad Group and a professional manufacturer and exporter of zinc-aluminum-magnesium coated steel coils (ZAM). From our production hub in Tianjin, China, we supply alloy-coated steel coils to solar mounting frame manufacturers, agricultural equipment builders, infrastructure contractors, and steel stockists in 78+ countries. We provide mill-direct pricing, custom processing, and rapid export dispatch through Tianjin Port. Our ZAM coils can be supplied to international specifications on request.
Zn-Al-Mg Coated Coils: Our ZAM coils feature a zinc-aluminum-magnesium alloy coating designed for improved corrosion resistance in demanding environments. According to our brochure, the standard coating range is 30–450 g/m². Specific coating designations such as ZM120–ZM450 are available on request. The surface is supplied as regular or as required. Suitable for solar brackets, agricultural infrastructure, and general construction.
Solar Bracket Grade ZAM Coils: Solar bracket grade is available on request. Please share your strength requirement, coating weight, and application so we can recommend a suitable specification. Typical uses include photovoltaic mounting systems, agricultural structures, and outdoor equipment.
Commercial & Formable ZAM Coils: Commercial and formable grades are available on request. They can be used for livestock housing, greenhouses, cable trays, HVAC ductwork, guardrails, and other applications requiring formability and corrosion resistance.
Thickness: 0.3–3.5 mm
Width: 870–1250 mm
Coating weight: 30–450 g/m²
Coil weight: 3–24 MT
Coil inner diameter: 508 / 610 mm
Surface: regular or as required
Surface treatments: chromated, oiled, anti-fingerprint, skin-passed, or dry available on request
Secondary processing: slitting, cut-to-length shearing, and PE film lamination available on request
We support flexible order planning for solar bracket makers, agricultural builders, infrastructure contractors, and distributors. Specifications can be adjusted according to end use, processing method, and destination market requirements.
Solar mounting brackets and PV structures
Agricultural equipment and greenhouses
Livestock housing and farm buildings
Cable trays and HVAC ductwork
Highway guardrails and infrastructure
General fabrication and outdoor structures
Every production batch undergoes laboratory inspection, including coating weight measurement, bend tests, tensile and yield 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 moisture damage, surface oxidation, and coil edge deformation during ocean freight, our ZAM coils use multi-layer export packaging: rust-inhibiting VCI paper, plastic moisture barriers, metallic outer casing, corner protectors, and heavy 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, cutting, and 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 for your upcoming steel procurement project. Please share your required thickness, width, coating weight, surface treatment, and destination port so we can recommend the most suitable specification.
AUTHENTIC STEEL
Email: alice@authsteel.com
Mobile / Tel / WhatsApp: +86 137 8227 9845
