RUNYING Steel Group is a leading Tangshan manufacturer and export supplier of high-quality Hot Dip Galvanized Steel Coils (GI) and Galvalume Steel Coils (GL). Our galvanized coils are manufactured by passing continuous full-hard cold-rolled steel through a molten zinc bath, forming a tight, corrosion-resistant metallurgical zinc-iron alloy protective coating.

With custom zinc coating weights (Z30-Z600g/㎡), strict thickness tolerances (±0.02mm)), and multiple surface spangle finishes, our galvanized coils are optimized for roll forming, deep stamping, HVAC ductwork, and structural steel applications worldwide.

Technical Specifications (Factory Standard)

Key Advantages & Performance Highlights

1, Superior Atmospheric Corrosion Resistance:

High-purity zinc coating provides outstanding sacrificial cathodic protection, achieving ≥1000 Hours in salt spray tests (ASTM B117 at 100 g/㎡).

2, Excellent Cold Forming & Bending Flexibility:

Withstands 180 ℃ cold bending without zinc flaking, peeling, or micro-cracking, ideal for high-speed automated roll-forming machines.

3, Customized Surface Treatments:

Passivated with eco-friendly trivalent chromium (Cr3+) and anti-fingerprint coatings to ensure superior paint adhesion and resistance to storage stain / white rust.

Typical Industrial Applications

Construction & Infrastructure: Corrugated roofing sheets, standing seam panels, steel purlins (C/Z sections), floor decking, and HVAC ducting systems.

Solar Energy Systems: Solar panel mounting brackets, PV tracking structures, and electrical cabinet enclosures.

Agricultural Equipment: Grain storage silos, harvester panels, feeding troughs, and greenhouse structural tubing.

Automotive & Transportation: Highway guardrails, noise barriers, underbody brackets, and stamping components.

Home Appliances: Washing machine drums, outdoor air conditioner frames, refrigerator backing plates, and vending machines.

Why Source GI Coils from RUNYING Steel Group?

$Cr3+$$\pm 0.02\text{mm}$$Z30-Z600{\text{g/m}}^{}$ISO 9001 Certified Quality Assurance: Full heat-batch traceability, coating mass verification, and official Mill Test Certificates (MTC) supplied according to EN 10204 3.1.

Direct Tangshan Mill Pricing: Located in China's steel manufacturing hub, we offer competitive bulk rates without middleman margins.

Seaworthy Export Packaging & Logistics: Heavy-duty VCI anti-rust paper, steel edge protectors, inner/outer steel rings, and heavy strapping to prevent rust and telescoping during ocean shipping from Tianjin Port.

Request Your Galvanized Steel Coil Quote Today

Looking for direct factory quotes for Z30-Z600g/㎡ hot dip galvanized steel coils or slit strips? Contact our ISO 9001-certified export team today for stock availability, MTC samples, and competitive CIF shipping rates within 24 hours:

Email Sales: admin@tsrysteel.com

WhatsApp: +86 15176700707

Official Website: http://www.tsrysteel.com

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