ASTM G90 Galvanized Steel Coil | 275g/m² Marine Armor

Engineered for harsh environments, our ASTM G90 Galvanized Steel Coil delivers extreme corrosion resistance with a robust 275g/m² zinc coating (equivalent to Z275 per ISO standards), forming a 38.5μm protective layer that withstands 1,000+ hours in salt spray tests (ASTM B117). The hot-dip galvanization process bonds zinc to a high-strength steel base (Grades: DX51D, SGCC, S350GD), ensuring decades of service in coastal, industrial, and high-humidity zones. Certified to ASTM A653, JIS G3302, and EN 10142, this coil is ideal for critical infrastructure demanding longevity with minimal maintenance.

Technical Parameters

Applications

Coastal Infrastructure:
Bridge components, seawalls, and port facilities leveraging 25-year anti-perforation warranty (ISO 9227 C5-M).

Industrial Roofing & Siding:
Corrugated sheets for factories in corrosive zones (ammonia/salt resistance).

High-Strength Structural:
Solar farm mounts, transmission towers (Grades S350GD+Z, Yield: ≥350MPa).

Automotive & Appliances:
Chassis parts, HVAC ducts, and appliance housings (formability: DC53D+Z for deep drawing).

Customization

Material Grades:
DX51D (general use), DX53D (deep drawing), S550GD (structural).

Zinc Coating:
30-600g/m² (adjustable for indoor/outdoor use).

Surface Finishes:
Zero-spangle (smooth painting base), anti-fingerprint, woodgrain embossing.

MOQ:
25 tons (standard), 5 tons for logo/texture customization.

Packing and Shipping

Triple-Shield Packaging:

VCI anti-rust kraft paper inner layer

0.3mm PE waterproof film with moisture indicators

Steel-strapped pallets + edge guards (max. 8-ton coils).

Global Logistics:
FOB/CIF from Chinese ports; 15-day delivery for Asia, 30 days globally.

FAQ

Q: Why choose G90 over standard coatings?

A: G90’s 275g/m² coating provides 2X longer lifespan in coastal/industrial zones vs. G60 (180g/m²).

Q: Can it withstand welding?

A: Yes. Zinc-iron alloy coatings (ZF) offer superior weldability for structural joints.

Q: Maintenance requirements?

A: Self-passivating zinc layer reduces need for repainting; biennial inspections suffice.

Q: Certifications for EU projects?

A: Complies with EN 10142 (EU) and JIS G3302 (Japan).

Q:What is your working time?

A:In general, our online service time is Beijing time: 8:00-22:00, after 22:00, we will reply to your inquiry in the coming working day.