JIS G3302 SGCC Hot Dipped Galvanized Steel Coil Z60–Z275 for Roofing and Industrial Fabrication

１．Product Overview

Hot dipped galvanized steel coil is manufactured according to JIS G3302, ASTM A653, and EN 10147 standards using continuous hot-dip galvanizing technology. The zinc coating forms a protective barrier against corrosion while maintaining good formability and processing performance.

The product is widely used for roofing systems, wall panels, furniture manufacturing, electrical cabinets, industrial freezers, ducting systems, and general fabrication applications. Various spangle finishes and surface treatments are available to meet different appearance and processing requirements.

２．Technical Solution

The steel substrate is continuously immersed in molten zinc to create a metallurgically bonded coating layer. This process provides long-term corrosion protection while preserving the mechanical properties of the base steel.

Available surface treatments including passivation, oiling, and anti-finger coating help improve storage stability, transportation performance, and resistance to white rust during handling and fabrication.

Regular, minimized, big, and zero spangle finishes allow selection according to painting requirements, exposed architectural applications, or industrial processing needs.

３．Specifications

４．Application

This galvanized steel coil is widely used in residential and industrial roofing systems, exterior wall panels, furniture manufacturing, electrical control cabinets, industrial refrigeration equipment, ventilation systems, storage facilities, roll-formed profiles, and construction components.

The product is also suitable for downstream processing into galvanized sheets, corrugated panels, structural profiles, purlins, and appliance components.

５．Processing

The coils support slitting, cut-to-length processing, roll forming, bending, punching, stamping, profiling, and fabrication.

Mill edge and cut edge options can be supplied according to project requirements. Customized widths and processing services are available to improve material utilization and production efficiency.

６．Advantages

JIS G3302 and ASTM A653 compliance supports international project requirements.

Z60–Z275 coating range provides reliable corrosion protection for indoor and outdoor applications.

Multiple spangle options support both decorative and industrial uses.

Passivated, oiled, and anti-finger finishes improve storage and transportation performance.

35–1250mm width range supports narrow strip processing and full-width coil applications.

SGCC and DX51D grades provide good formability for roll forming and fabrication.

７．How to Choose

• Choose SGCC for general forming and construction applications.
• Choose DX51D+Z for roofing, wall cladding, and profile production.
• Choose zero spangle when painting or decorative appearance is important.
• Choose regular or big spangle when traditional galvanized appearance is preferred.
• Select anti-finger treatment for appliance and exposed surface applications.
• Choose higher zinc coating levels when the product will be exposed to outdoor or humid environments.

８．FAQ

Q1．What standards are available?

The product can be supplied according to JIS G3302, ASTM A653, and EN 10147 standards.

Q2．What spangle types can be supplied?

Regular spangle, minimized spangle, big spangle, and zero spangle are available.

Q3．What zinc coating range is available?

The coating range is 60–275g/m² according to project requirements.

Q4．What surface treatments are available?

Passivated (chromated), oiled, and anti-finger treatments are available.

Q5．What industries commonly use this product?

Construction, furniture manufacturing, roofing systems, industrial refrigeration equipment, electrical cabinets, and general steel fabrication industries commonly use galvanized steel coils.