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.
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 |
The exceptional durability of Z275 galvanized steel coil makes it suitable for a wide range of demanding industrial and construction applications. Key uses include:
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:
As a direct factory, ChinaCNU Steel offers highly competitive pricing for our Z275 galvanized steel coils. Our quotes are typically provided on an FOB Qingdao 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.
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.
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.
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.
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.
Send us your specs and get a free FOB Qingdao quote within 24 hours.
