1. Technical Specifications

2. State-of-the-Art Production Technology from Vietnam

Our GI & GL coils are processed in Vietnam's leading continuous galvanizing lines (CGL) engineered by global metallurgical giants such as Danieli (Italy) and SMS Group (Germany). Utilizing advanced gas-knife thickness control and electromagnetic stabilizing systems, our mills achieve highly precise, uniform coating distribution across both sides of the strip. The steel substrate undergoes a direct inline annealing process before being hot-dipped into the molten metal bath, ensuring superior adhesion, uniform mechanical strength, and excellent elongation parameters.

Operating under strict environmental standards, our partner mills are pioneers of green steel vietnam initiatives. By utilizing energy-circulating waste heat recovery, water treatment recycle loops, and nitrogen oxide-mitigated burners, we produce high-durability steel with a substantially lowered carbon footprint. This modern, ecologically aligned processing model ensures that all Efreso GI & GL coils are fully CBAM-ready, providing our trade partners in the EU, USA, and Australia with a smooth and legally compliant supply chain.

3. Why Choose Efreso's Galvanized & Galvalume Coils?

• Exceptional Corrosion Barrier: Galvalume (GL) offers up to 2-4 times the lifespan of standard Galvanized steel under comparable environmental conditions, thanks to the self-healing and protective combination of aluminum oxide and zinc sacrificial barriers.

• Superb Surface Finish & Aesthetics: Available with anti-fingerprint (AFP) coatings and highly uniform skin-passed zero-spangle textures, providing a perfect, uniform base for immediate color painting or architectural installation.

• High Heat Reflectivity: Our GL coatings offer remarkable thermal reflectivity, reflecting twice as much heat as standard GI sheet, making them excellent energy-conserving elements in roofing panels.

• Flawless Coating Adhesion & Formability: Designed to maintain complete coating integrity without flaking or micro-cracking, even during extreme profile roll-forming, folding, and deep-drawing processes.

4. Strategic Sourcing Advantages from Vietnam

Comprehensive Tariff & Duty Savings

As a leading vietnam steel exporter, Efreso utilizes Vietnam's active preferential trade treaty networks to maximize your ROI. We issue authentic, fully compliant Certificates of Origin (including C/O Form EUR.1, Form CPTPP, and Form D), qualifying our shipments for up to 0% preferential customs duties across the EU, UK, Canada, Australia, and ASEAN regions.

Strategic Logistics & Deep-Sea Shipping

Our shipping facilities are positioned in strategic proximity to Vietnam's largest maritime hubs—including Hai Phong, Da Nang, and Cai Mep - Thi Vai. This geographic placement allows us to negotiate highly competitive ocean freight rates, secure flexible booking schedules, and optimize transit times to major global sea routes.

Trade Defense & Anti-Dumping Mitigation

Procuring directly from a fully certified, integrated vietnam steel mill provides a reliable hedge against geopolitical trade risks. With 100% Vietnamese melt-and-pour or substantial processing provenance, our GI and GL coils enable buyers to bypass high anti-dumping and anti-circumvention import duties targeting alternative supply regions.

5. Key Applications & Industries

• Building & Architecture: Corrugated roofing panels, wall cladding, structural purlins, sandwich panels, air-conditioning duct systems, and light-gauge steel framing.

• Home Appliances: Outer casings and internal structural sheets for refrigerators, washing machines, ovens, microwave ovens, and water heaters.

• Automotive Parts: Underbody components, heat shields, seat frame parts, and structural panels requiring light weight and high rust resistance.

• Downstream Manufacturing: Excellent base substrate material for prepainted galvanized/galvalume steel coils (PPGI / PPGL).

6. Packaging, Loading & Delivery Details

• Supply Ability: 45,000 Metric Tons (MT) per Month

• Minimum Order Quantity (MOQ): 25 MT (1x20ft FCL) for standard specs; 500 MT per size for custom-scheduled mill runs.

• Export Packaging: Seaworthy, professional export packaging. Coils are wrapped in waterproof plastic film and anti-corrosive VCI paper, encased in heavy-duty steel protective jackets, guarded by inner/outer metal edge rings, and tightly bound with radial/circumferential steel straps.

• Loading Capacity: 25–28 MT per 20ft container, securely braced and choked with treated timber and high-tensile steel lashing wire to ensure safety during sea transit.

• Payment Terms: Irrevocable Letter of Credit (L/C at sight) or T/T with agreed advance deposit.

7. Frequently Asked Questions

Q1: How does Efreso verify and guarantee the thickness of the metallic coating (g/m²)?

Our mills use sophisticated inline continuous X-ray and radioisotope gauges to monitor and record coating weight in real-time. Additionally, every batch is verified by destructive cup-tests and spectroscopic analysis. We also arrange independent third-party test verification by SGS, Bureau Veritas (BV), or Intertek prior to loading.

Q2: Are Efreso's GI and GL coils compliant with the EU's Carbon Border Adjustment Mechanism (CBAM)?

Yes. Our partner mills trace and calculate the embedded greenhouse gases (Scope 1, 2, and 3) during production. We provide the fully validated carbon emission reports and certificates necessary for your EU customs filing, eliminating any compliance risks.

Q3: What is the typical lead time from order placement to shipment?

For standard specifications (standard zinc coating, thickness, and width), we can ship from our stock warehouses within 15 to 20 days. For custom metallic coatings, specific grades (e.g., S350GD, S550GD), or colored anti-fingerprint requests, the mill rolling lead time typically ranges from 40 to 55 days.

Q4: How do you guarantee the coils will not suffer from white rust or water staining during ocean transit?

We use advanced chemical passivating (chromated or eco-friendly trivalent chrome), dry or oiled options, and secure heavy sea-worthy export wrapping consisting of anti-corrosive VCI papers and water-resistant plastic barriers. Additionally, all containers are packed with moisture-absorbing desiccant bags.