High-Corrosion Resistance & Low-Carbon GI / GL Steel Coils from Vietnam
Efreso is your strategic B2B sourcing partner for premium Hot-Dip Galvanized (GI) and 55% Aluminum-Zinc Alloy Coated Galvalume (GL) steel coils, manufactured by Vietnam’s leading continuous coating facilities. Utilizing Electric Arc Furnace (EAF) low-emission hot rolled substrate, our coated steel coils deliver exceptional atmospheric protection, superior paint adhesion, and zero-spangle options for precision roll forming and industrial manufacturing.
By sourcing GI and GL coils from Efreso, global buyers eliminate carbon tariff risks under European and American CBAM regulations while unlocking 0% import duty advantages through Vietnam’s expansive network of international Free Trade Agreements.
Technical Specifications & Coating Compliance Matrix
Our GI and GL coils are manufactured under strict automated coating weight controls, complying with major global engineering standards (ASTM, JIS, EN).
| Technical Parameter | Hot-Dip Galvanized Steel Coil (GI) | Galvalume Steel Coil (GL) |
|---|---|---|
| Coating Composition | 99% Pure Zinc (Continuous Hot-Dip) | 55% Aluminum, 43.4% Zinc, 1.6% Silicon |
| Manufacturing Process | EAF Low-Carbon HRC Substrate ➔ Cold Rolling ➔ Continuous Hot-Dip Galvanizing | EAF Low-Carbon HRC Substrate ➔ Cold Rolling ➔ Continuous Hot-Dip Al-Zn Coating |
| International Standards |
JIS G3302: SGCC, SGCD, SGLC ASTM A653: CS, FS, SS Grade 33-80 EN 10346: DX51D+Z, DX52D+Z |
JIS G3321: SGLCC, SGLCD, SGLH ASTM A792: CS, DS, SS Grade 33-80 EN 10346: DX51D+AZ, DX52D+AZ |
| Coating Mass Range | Z08 to Z275 (80 g/m² – 275 g/m² total both sides) | AZ30 to AZ150 (30 g/m² – 150 g/m² total both sides) |
| Thickness Range | 0.15 mm – 3.00 mm | 0.15 mm – 2.00 mm |
| Width Range | 600 mm – 1,250 mm | 600 mm – 1,250 mm |
| Surface Finish | Regular Spangle, Minimized Spangle, Zero Spangle | Regular Spangle, High-Gloss / Anti-Fingerprint (AFP) |
| Surface Treatment | Chromated (Cr3+ Eco-friendly), Oiled, Un-oiled, Skin-Passed | Clear / Blue / Green Anti-Fingerprint (AFP), Organic Sealer |
| Coil Inner Diameter | ID: 508 mm or 610 mm; OD: Max 2,000 mm | ID: 508 mm or 610 mm; OD: Max 2,000 mm |
| Compliance & Audit | Mill Test Report (MTR EN 10204 3.1), EPD, GHG Report, ISO 9001, ISO 14001 | Mill Test Report (MTR EN 10204 3.1), EPD, GHG Report, ISO 9001, ISO 14001 |
Business Benefits for Industrial Roll Formers & Manufacturers
🛡️ 3x–6x Longer Lifespan & Coating Adhesion
Our 55% Al-Zn Galvalume coating combines the barrier protection of aluminum with the sacrificial protection of zinc, offering 3 to 6 times longer outdoor durability in harsh industrial and coastal environments compared to standard galvanized steel.
High-precision annealing and air-knife control ensure uniform zinc layer adhesion. Coils withstand severe 180° lock-forming and deep bending without cracking, peeling, or micro-fracturing the metallic coating.
🌿 CBAM Exemption & Low-Carbon Procurement
Produced from Vietnam’s EAF steelmaking plants powered by clean energy grids, Efreso’s GI and GL coils significantly lower your company’s Scope 3 supply chain carbon footprint.
Full Environmental Product Declarations (EPD) and Greenhouse Gas (GHG) inventory dossiers accompany every shipment, securing friction-free customs clearance under EU CBAM rules.
💰 Direct Landed Cost Savings via FTA Frameworks
Leverage Vietnam’s trade agreements (EVFTA, CPTPP, RCEP, UKVFTA) to import certified GI/GL coils completely duty-free or under reduced tariff rates.
Save 8% to 15% on total procurement costs, enabling your roll-forming or manufacturing business to outbid competitors on major structural tenders.
Surface Protection & Export Packaging Protocol
Zinc Thickness Gauging
EAF Carbon Audit Check
Salt Spray Corrosion Analysis
Third-Party Inspection (SGS)
VCI Anti-Rust Inner Paper
Heavy Steel Outer Shell & ID
Moisture Absorber Desiccants
Container Floor Lashing
Anti-White Rust Packaging Guarantee
All GI and GL coils undergo eco-friendly passivation/anti-fingerprint treatment and are wrapped in heavy-duty Volatile Corrosion Inhibitor (VCI) film. Each coil is enclosed in a rigid steel outer jacket with inner/outer radial corner protectors.
Third-Party Lab Verification
Independent inspectors (SGS, Intertek, or Bureau Veritas) check zinc layer distribution (g/m²), mechanical yield strength, and packaging integrity prior to vessel loading.
Efreso guarantees that 100% of delivered GI and GL steel coils conform precisely to the agreed coating weight (g/m²), thickness tolerances, and surface treatments. Any material non-conformities identified during independent discharge inspections are backed by clear contract replacement protocols.
Request a Landed GI / GL Quotation Today
Connect with our coated steel technical sales managers to discuss your specific coating mass requirements, request original Mill Test Reports, or obtain the complete EPD Compliance Pack for your procurement team.
Get Landed Pricing
Submit your required coating mass (Z08-Z275 / AZ30-AZ150), thickness, surface finish, and target port for an instant FOB/CIF quote.
Download Technical Files
Access coated steel datasheets, Mill Test Report samples (EN 10204 3.1), and EPD environmental compliance dossiers.