Full Hard GI Steel Coil
Full Hard GI Steel Coil
High-Tensile G550 Full Hard Galvanized Steel Coil
| Standard | Full Hard (G550) |
| Grade | DX51D / SGCC |
| Thickness | 0.12–3.0 mm |
| Width | 600–1500 mm |
| Zinc Coating | Z30–Z275 g/m² |
High-Tensile G550 Grade
Yield strength > 550 Mpa. Providing exceptional structural rigidity.
Guaranteed Prime Quality
Prime material conforming strictly to ASTM/EN standards.
Tailored Sizes & Cutting
Custom thickness, width, and slitting service.
Reliable Supply Capacity
Consistent raw material supply and planned export scheduling.
Product Specifications
| Parameter | Details |
|---|---|
| Product Type | Full Hard GI Coil |
| Standard | ASTM A653 / EN 10346 / JIS G3302 |
| Grade | Full Hard (G550) |
| Thickness | 0.12–0.5 mm |
| Width | 600–1500 mm |
| Coil Weight | 3–8 metric tons |
| Zinc Coating | Z30–Z275 g/m² |
| Inner Diameter | 508 / 610 mm |
| Application | Corrugated roofing sheets，Roofing |
Quality Control & Shipping Case
Buyer Concerns (FAQ）
Q: How do I choose the zinc coating mass (Z30–Z275)?
A: Z30–Z80 is ideal for indoor cable trays and ducting. For outdoor roofing and high-humidity environments, we recommend Z180–Z275 for 15–25 years of rust resistance.
Q: What is the main application for Full Hard G550 GI steel coil?
A: Engineered specifically for corrugated roofing sheets, providing maximum rigidity and impact resistance at thinner gauges.
Q: How do you prevent white rust during ocean transport?
A: All coils undergo Chromate Passivation/Oiling paired with VCI anti-rust paper and waterproof plastic wrapping to isolate sea moisture during long transit.
Q: What mill certificates and standards do you offer?
A: Compliant with ASTM A653 / EN 10346 (DX51D/SGCC). Every shipment includes EN 10204 3.1 MTC, and we fully support SGS / BV third-party inspection.
