CNB GROUP supplies premium hot-dip galvanized (HDG/GI) steel coils manufactured via continuous hot-dip galvanizing process, featuring uniform zinc coating, strong adhesion and reliable corrosion protection. This DX51D construction grade GI coil is the most widely used specification for general building and construction applications, balancing cost efficiency and anti-corrosion performance.
Full Specifications
| Parameter | Standard Range | Common Construction Specs |
|---|---|---|
| Steel Grade | DX51D+Z, DX52D+Z | DX51D+Z |
| Thickness | 0.12 – 1.5 mm | 0.3 / 0.35 / 0.4 / 0.45 / 0.5 mm |
| Width | 900 – 1600 mm | 914 / 1000 / 1219 / 1220 / 1250 mm |
| Zinc Coating (double-sided) | Z40 – Z275 g/m² | Z80 / Z100 / Z120 / Z180 g/m² |
| Spangle Type | Regular / Minimized / Zero | Regular spangle |
| Surface Treatment | Chromated / Oiled / Anti-fingerprint | Trivalent chromium passivation |
| Coil ID | 508 / 610 mm | 508 mm |
| Coil Weight | 4 – 10 MT | 5 – 9 MT |
| Applicable Standards | ASTM A653M, EN 10346, GB/T 2518 | ASTM A653M |
Core Advantages
- Uniform zinc layer with strong adhesion, no peeling or flaking during roll forming
- Stable mechanical properties, suitable for bending, shearing and roll forming processes
- Trivalent chromium passivation for environmental compliance and 3-6 months storage rust protection
- Large ready stock of common construction sizes, 7-day fast delivery for bulk orders
Typical Applications Corrugated roofing sheets, wall cladding, garage doors, fencing, highway guardrails, prefabricated house panels, steel structure purlins and general construction fabrications.
Packing & Delivery Standard seaworthy export packing: waterproof paper + inner/outer steel rings + side protection plates + steel strips bundling. Wooden pallets (fumigated or non-fumigated) are optional. Delivery within 7-15 days from stock, 20-30 days for production orders.
