Welcome to Authentic Steel – Your Premier China Steel Manufacturer & Global Exporter
Established in 1994 as the dedicated international trade branch of Winroad Group, Authentic Steel has built an outstanding global reputation as a leading aluzinc coil manufacturer and international steel exporter. Strategically headquartered near the major shipping gateway of Tianjin Port, our company integrates sophisticated in-house coil processing lines with deep strategic partnerships with premier Chinese steel conglomerates, including Baosteel, Rizhao, HBIS, Yanshan Steel, Anfeng, and Zongheng. Over three decades of steady expansion, our international distribution network has extended to over 78 countries and regions across Southeast Asia, Europe, Africa, the Middle East, and the Americas.
Our core manufacturing lines are specialized in producing cold rolled steel coils, hot-dipped galvanized coils, galvalume (aluzinc) steel coils, prepainted color-coated steel coils (PPGI/PPGL), zinc-aluminum-magnesium (ZAM) coils, corrugated roofing sheets, and custom-slitted steel strips. Whether you are an industrial stockist searching for mill-direct GL steel sheet wholesale supply or an engineering contractor looking for high-durability roofing materials, Authentic Steel delivers exceptional metallurgical consistency, tight dimensional tolerances, and superior anti-corrosion protection.
High-Performance Galvalume Steel Coil (GL) & Aluzinc Solutions
Premium Galvalume Steel Coil (GL) Engineed for Severe Environments
As a premier galvalume steel coil manufacturer in China, Authentic Steel produces high-grade 55% Aluminum-Zinc alloy coated steel coils engineered for extreme atmospheric durability and heat reflectivity. By applying a continuous hot-dip coating process containing 55% aluminum, 43.4% zinc, and 1.6% silicon by weight, our galvalume steel coil products deliver up to four times the corrosion resistance of traditional galvanized steel, making them the gold standard for modern roofing, architectural wall cladding, solar mounting structures, and industrial ductwork.
Product Grade: Bare Galvalume Steel Coil / Aluzinc Steel Coil (GL)
Thickness Range: 0.1mm – 3.5mm (Precision cold rolled base metal)
Width Range: 870mm – 1250mm (Custom slitting available for narrow steel strips)
Aluzinc Coating Mass: AZ20g/m² to AZ180g/m² (Tailored for mild to severe marine and industrial climates)
Surface Treatments: Anti-fingerprint finish (Clear/Chromate/Green/Blue AFP), Oiled, or Unoiled
Coil Inner Diameter & Weight: 508mm / 610mm ID | 3 – 24 Metric Tons per coil
Manufacturing Standards: ASTM A792, JIS G3322, EN 10346, DX51D+AZ, S250GD+AZ, S350GD+AZ, G550
Direct Factory Wholesale Advantages: Partnering directly with experienced galvalume coil suppliers eliminates intermediate trading layers, providing your business with mill-direct GL steel sheet wholesale pricing to maximize project margins.
In-House Quality Control Laboratory: Every production lot is subject to comprehensive mechanical and chemical testing in our factory lab, including coating mass verification, salt spray corrosion tests, bend tests, and surface roughness inspection.
Strategic Tianjin Port Shipping: Located near Tianjin Port, we guarantee rapid inland transport, flexible container/bulk vessel stuffing, and minimal ocean freight friction.
Reinforced Seaworthy Export Packaging: Wrapped in heavy-duty waterproof paper, anti-rust steel strapping, inner/outer metal edge protectors, and sturdy wooden pallets to ensure zero damage during long ocean transit.
Connect with our dedicated international trade division today to lock in highly competitive factory-direct pricing, request technical datasheets, or order free samples!
