ASTM Hot DIP Galvanized Steel Coil Gi S350gd S550gd Dx51d Z40-Z275

High Corrosion Resistance: Uniform hot-dip zinc coating provides exceptional long-term sacrificial protection against environmental rust.

High Structural Strength: Available in structural grades up to S350GD and S550GD, delivering high yield strength for heavy-duty steel framing.

Superior Surface Options: Offered in zero spangle, minimized spangle, and regular spangle finishes to meet varied aesthetic and painting requirements.

Passivated Anti-Rust Treatment: Environmentally friendly chromate or oil-passivated surface treatment effectively prevents white rust during transit and storage.

Excellent Formability & Ductility: High-grade cold rolled base metal ensures smooth deep drawing, roll forming, and 180-degree bending without coating flaking.

Precise Dimensional Tolerance: Advanced cold rolling and tension leveling guarantee uniform thickness, flat strip profile, and tight width tolerances.

Strong Paint & Primer Adhesion: Micro-rough zinc coating texture serves as an excellent substrate for direct powder coating and color painting.

Certified Quality Standards: Fully manufactured to ASTM A653, EN 10346, JIS G3302, and GB/T 2518 standards with official MTC 3.1 certification.

Wide Application Spectrum: Essential raw material for structural decking, purlins, cable trays, HVAC ducting, and corrugated roofing profiles.

Robust Seaworthy Packaging: Heavy-duty packaging featuring VCI anti-rust paper, inner/outer steel edge protectors, plastic film wrapping, and radial steel bands.