Premium Hot-Dip Galvanized (HDGI) Steel Strips & Coils engineered with a protective zinc coating for long-term corrosion resistance. Compliant with ASTM A653, EN 10346, and JIS G3302 standards.
Dimensions & Coating: Thickness 0.2–4.5 mm | Width 30–870 mm | Zinc Z40–Z275 g/m²
Coil Specs: Weight 3–13 MT | Inner Diameter 508 / 610 mm
Surface & Processing: Custom Slitting, Deburred Edges, Chromated Passivation, Anti-Fingerprint (AFP)
Primary Applications: Welded Pipes, Cable Armoring, C/Z Purlins, HVAC Ducting, and Solar Mounting
Authentic Steel is a premier global galvanized steel strip supplier, manufacturer, and exporter of high-performance galvanized steel slit coil and hot-dip GI strip products engineered for superior corrosion resistance, exceptional mechanical strength, and long-term structural durability. Manufactured through an advanced continuous hot-dip galvanizing process, our steel strip forms a tightly bonded zinc coating that guards against harsh atmospheric exposure, humidity, and oxidation.
Strictly conforming to international engineering benchmarks including ASTM A653/A653M, EN 10346, JIS G3302, and GB/T 2518, our hot-dip galvanized steel strips provide reliable performance across demanding structural, mechanical, electrical infrastructure, and automotive applications.
Product Formats: Hot-Dip Galvanized Steel Strip, Galvanized Steel Slit Coil, GI Tape
Thickness Range: 0.20 mm to 4.50 mm (Tight cold-rolled gauge tolerance control)
Width Range: 30 mm to 870 mm (Slit edge galvanized steel strip with custom precision slitting & deburred safety edges)
Zinc Coating Mass: Z30 to Z275 g/m² (Symmetric or differential coating)
Surface Spangle & Finish: Zero Spangle (Minimized), Regular Spangle, Chromated (Passivated), Oiled, or Dry
Coil Specifications: Flexible unit coil weights from 3 to 13 MT; Standard Inner Diameter (ID): 508 mm or 610 mm for seamless integration with commercial decoilers
Edge Finishing Options: Precision Slit Edge, Mill Edge, or Deburred / Rounded Safety Edge
Manufacturing Standards: ASTM A653/A653M, EN 10346, JIS G3302, GB/T 2518
Commercial & Lock-Forming Quality (DX51D / CS Grade): GB SGCC/DX51D+Z | ASTM A653 CS Type A/B/C | EN 10346 DX51D+Z | JIS G3302 SGCC (Optimized for galvanized steel strip for pipe making, HVAC ducting, and general hardware)
Deep-Drawing Quality (DX52D / DX53D / FS/DDS Grade): GB DX52D/DX53D+Z | ASTM A653 FS/DDS | EN 10346 DX52D/DX53D+Z | JIS G3302 SGCD1/SGCD2 (Ideal for complex stamping, cable armoring, and flexible conduits)
High-Strength Structural Quality (S250GD–S550GD): GB TS250GD–TS550GD+Z | ASTM A653 SS Grade 33 to 80 | EN 10346 S250GD–S550GD+Z | JIS G3302 SGCG340–SGCG570 (Engineered specifically as galvanized steel strip for C Z purlin, solar racking, and heavy structural framing)
Our hot-dip galvanized steel strip is formulated for high-stress forming and heavy-duty industrial fabrication:
Welded Pipe & Tube Production: Exceptional zinc layer adhesion prevents cracking or flaking during high-frequency induction welding and continuous roll-forming for structural tubing and conduit pipes.
Construction Profiles & C/Z Purlins: High yield strength combined with robust galvanic coating provides structural integrity for light-gauge steel framing, C/Z purlins, HVAC ductwork, and solar mounting structures.
Cable Armoring & Flexible Conduits: High tensile ductility coupled with reliable galvanic protection guards underground power cables, fiber optic armoring, and flexible metallic conduits against mechanical impact and soil moisture corrosion.
Every batch of galvanized steel strip undergoes rigorous quality verification, including coating mass checks (triple spot test), T-bend flexibility testing (0T–2T), tensile strength evaluation, and neutral salt spray (NSS) corrosion resistance trials. Material Test Certificates (MTC EN 10204 3.1) and third-party pre-shipment inspections (SGS, Bureau Veritas) are provided standard.
Value-added processing services include custom precision slitting, cut-to-length sheet leveling, edge deburring, and protective oiling or passivation. To guarantee zero oxidation or transit damage during ocean shipping, all orders receive heavy-duty seaworthy export packaging: anti-rust VCI film wrapping, moisture-proof protective covers, heavy metal edge protectors, and high-tensile steel strapping securely anchored to sturdy wooden pallets.
Partner with a trusted manufacturer: contact our technical export specialists today to receive customized slitting options, physical samples, and real-time factory-direct wholesale pricing for your upcoming commercial shipments!
Request a Fast Quote: Contact our technical export specialists today to receive customized slitting options, physical samples, and real-time wholesale pricing for your upcoming shipments!
WhatsApp: +86-137 8227 9845
E-mail: alice@authsteel.com
