Authentic Steel is the export department of Winroad Group and a professional manufacturer and exporter of galvalume steel coils (GL / Aluzinc). From our production hub in Tianjin, China, we supply aluminum-zinc alloy-coated steel coils to roofing panel fabricators, pre-engineered building constructors, home appliance manufacturers, and steel distributors in 78+ countries. We provide mill-direct pricing, custom processing, and rapid export dispatch through Tianjin Port. Our GL coils can be supplied to international specifications on request.
According to our company brochure, galvalume steel coils are available with a coating weight range of 20–180 g/m². Specific coating designations such as AZ30–AZ150 are available on request. The aluminum-zinc alloy coating is designed for good atmospheric corrosion resistance and heat reflectivity. Surface is supplied as regular or as required. Please share your target application, coating weight, and service environment so we can recommend a suitable specification.
Thickness: 0.1–3.5 mm
Width: 870–1250 mm
Coating weight: 20–180 g/m²
Coil weight: 3–24 MT
Coil inner diameter: 508 / 610 mm
Surface: regular or as required
Surface treatments: anti-fingerprint, chromated, oiled, or dry available on request
Steel grades: available on request
Standards: ASTM, EN, 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.
Roofing and architectural cladding: corrugated GL roofing sheets, wall panels, sandwich panel skins, gutters, and downspouts
Substrate for PPGL: smooth surface and suitable pretreatment for prepainted aluzinc steel production
Appliance and heat-related equipment: oven panels, heat exchanger parts, dryer drums, and HVAC ducting
Agricultural and industrial structures: grain silos, poultry house roofing, factory wall cladding, and C/Z purlins
General outdoor structures requiring corrosion protection
Authentic Steel supports custom processing for project-specific requirements:
Precision slitting into narrow galvalume strips
Cut-to-length galvalume 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 coating weight 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 black spot oxidation, moisture damage, and edge deformation during ocean transport, our GL coils use multi-layer export packaging: rust-inhibiting VCI paper, plastic moisture barriers, galvalume 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, coating weight, surface treatment, and destination port.
AUTHENTIC STEEL
Email: alice@authsteel.com
Mobile / Tel / WhatsApp: +86 137 8227 9845
