Q345 Color Coated Steel Coil

Q345 color-coated steel coil is a high-strength steel product with a zinc-coated surface and a durable color finish, offering both structural integrity and aesthetic appeal. The “Q345” grade indicates a medium to high-strength steel with a minimum yield strength of 345 MPa, making it suitable for demanding applications that require enhanced load-bearing capacity and toughness. The color coating, typically made from polyester, PVC, or PVDF, adds resistance to corrosion, weather, and UV degradation. This steel coil is widely used in construction, automotive, and appliance industries, providing long-lasting performance, visual appeal, and excellent protection against harsh environmental conditions.

Color Coated Steel Coil Standard Specification

Our Q345 Color Coated Steel Coil is stored in a state-of-the-art warehouse designed to optimize both storage and handling. The facility is equipped with climate control systems to maintain ideal temperature and humidity levels, preventing rust or deterioration of the steel coils. The coils are neatly stacked on durable racking systems, ensuring easy access for inventory checks and shipping processes. We maintain a large stock of Q345 Color Coated Steel Coil, ensuring fast delivery times and availability for bulk orders. Our efficient warehouse management ensures prompt response to customer orders and reliable order fulfillment, making us your trusted partner for high-quality steel coil supply.

The appearance of the coating is bright, meticulous, without sagging or wrinkles. Thickness inspection can use coating thickness gauge, the method is relatively simple. The thickness of the coating can also be obtained by converting the amount of zinc adhesion. For the bonding strength, a bending press can be used to bend the sample at 90-180°, and there should be no cracks or peeling of the coating. A heavy hammer can also be used to test, and the salt spray test and copper sulfate corrosion test can be done in batches.

Engineered to GB/T 12754 standards, Q345 Color Coated Steel Coil offers a thickness range of 0.5–3.0 mm (±0.03 mm tolerance), widths of 800–1,500 mm, and a high-performance PVDF or SMP coating for extreme weather resistance. Available in 15+ standard RAL colors or custom-matched finishes, it delivers a tensile strength of 470–630 MPa and elongation up to 22% for structural forming in bridges, industrial roofs, and heavy-duty façades. Custom slit widths, coil weights (5–25 tons), and protective film options optimize production efficiency. 

Our Q345 Color Coated Steel Coil is securely packaged in heavy-duty, edge-protected polypropylene sleeves with anti-scratch and moisture-resistant layers to safeguard the pre-painted finish during global logistics. Each coil is shrink-wrapped with UV-blocking film and strapped with reinforced steel bands, ensuring color retention and corrosion resistance for structural applications. Bulk orders (2,000+ coils) include palletized packaging with customizable branding or 100% recyclable materials to meet ESG goals.