For projects demanding superior corrosion resistance, a Z275 galvanized steel coil is the definitive industrial choice. This product refers to a cold-rolled steel coil that has been continuously hot-dip coated with a heavy zinc layer, precisely measured at 275 grams per square meter (Z275) on both surfaces. This substantial Z275 zinc coating provides a robust, sacrificial barrier against rust and oxidation, making it ideal for harsh environments and long-term structural applications. ChinaCNU Steel, with over 15 years of expertise, manufactures premium heavy galvanized coil products in Qingdao, China, exporting directly to global B2B buyers.
Product Specifications
Our Z275 GI coils are produced to exacting international standards, ensuring consistent quality and performance. The detailed Z275 GI specs for our standard inventory are outlined in the table below. Custom dimensions and grades can be accommodated upon request.
| Grade | Thickness (mm) | Width (mm) | Zinc Coating (g/m²) | Standard |
|---|---|---|---|---|
| DX51D, DX52D, DX53D, S350GD | 0.15 – 3.0 | 600 – 1500 | Z275 (275 min) | EN 10346, ASTM A653, JIS G3302 |
| S550GD | 1.0 – 2.5 | 1000 – 1250 | Z275 (275 min) | EN 10346 |
| Q235, Q355 | 0.8 – 3.0 | 1000 – 1500 | Z275 (275 min) | GB/T 2518 |
Applications
The exceptional durability of Z275 galvanized steel coil makes it suitable for a wide range of demanding industrial and construction applications. Key uses include:
- Building & Construction: Structural frames, roof trusses, purlins, wall cladding, and industrial warehouse components.
- Automotive Manufacturing: Underbody parts, chassis components, and structural reinforcements requiring high corrosion resistance.
- Agricultural Equipment: Grain silos, livestock housing, machinery guards, and irrigation system parts exposed to weather and chemicals.
- HVAC & Ductwork: Fabrication of air handling units and ventilation ducts where longevity is critical.
- Electrical Enclosures & Cable Trays: Cabinets, boxes, and support systems that need protection in industrial settings.
- Heavy-Duty Storage Solutions: Racking systems, shipping containers, and large industrial shelving.
Why Choose ChinaCNU Steel
Selecting ChinaCNU as your supplier for heavy galvanized coil ensures reliability, quality, and a seamless procurement process. Here are the key trust points that distinguish us:
- Direct Factory Source: We are a professional steel factory based in Qingdao, China, eliminating middlemen and ensuring competitive pricing and quality control from production to shipment.
- International Certifications: Our manufacturing process is certified to ISO 9001 standards, and our coils are available with SGS inspection reports for quality verification.
- Global Export Experience: With 15+ years of expertise, we have successfully exported to over 50 countries across Africa, the Middle East, Southeast Asia, and South America.
- Flexible MOQ & Lead Time: We offer a manageable MOQ of 25 tons and maintain a reliable lead time of 15-25 days for most orders, ensuring your project stays on schedule.
- Secure Packing & Payment: Coils are packed in waterproof and shock-absorbent materials (standard export packing) and secured on wooden pallets. We accept secure payment methods including T/T and L/C.
- Technical Support: Our expert team provides comprehensive support on material selection, specifications, and application advice.
PPGI/GI Pricing
As a direct factory, ChinaCNU Steel offers highly competitive pricing for our Z275 galvanized steel coils. Our quotes are typically provided on an FOB Tianjin basis, which includes the cost of the goods, packing, and delivery to the main port. The final price per ton depends on several dynamic factors including raw material costs (steel and zinc), coil dimensions (thickness, width), grade, and international market conditions. We invite you to contact us with your specific requirements for a free, no-obligation quote, which we aim to provide within 24 hours.
FAQ
What is the difference between Z275 and other zinc coating classes like Z180 or Z350?
Z275 refers specifically to a zinc coating mass of 275 grams per square meter. It offers a thicker protective layer than Z180 (180 g/m²) for better longevity in corrosive environments, while being more cost-effective than a Z350 coating (350 g/m²) for many heavy-duty applications. Choosing the right class depends on your project’s specific corrosion resistance requirements for outdoor structures.
Can you supply Z275 galvanized steel coil with a chromate passivation or other surface treatment?
Yes, we can. Our standard Z275 GI coil has a spangle finish, but we can apply various surface treatments such as chromate passivation (anti-fingerprint), oiling, or phosphating upon request. These treatments enhance paint adhesion or provide extra protection against white rust during transit, which is crucial for pre-painted steel coil feedstock.
What are the standard packing details for export shipments?
For safe ocean freight, each heavy galvanized coil is wrapped with a waterproof plastic sheet and reinforced with steel straps. The coils are then mounted on sturdy wooden pallets or cradles to prevent movement. We can accommodate specific packing requests to meet the requirements of different shipping lines and destinations.
Do you provide material certificates with the shipment?
Absolutely. A full set of shipping documents, including the Mill Test Certificate (MTC/COC) detailing the chemical composition, mechanical properties, and Z275 GI specs, along with commercial invoices, packing lists, and bill of lading, is provided with every consignment. Third-party inspection reports (e.g., SGS) are also available.
Get Factory Price for Z275 Galvanized Steel Coil
Send us your specs and get a free FOB Tianjin quote within 24 hours.