ASTM DX51D Prepainted Galvalume Steel Coil Z275 For Building Materials

Introduction

Color-coated coil is produced by applying one or multiple layers of organic coating onto base materials like hot-dip galvanized plates, hot-dip aluminum-zinc plates, or electrogalvanized plates after surface pretreatment, followed by baking and curing. Named for its various color coatings, it is lightweight, aesthetically pleasing, corrosion-resistant, and can be processed directly. Common colors include gray, blue, and brick red, making it widely used in advertising, construction, home appliance, electrical appliance, furniture, and transportation industries.

Specification

Color-coated Steel Coil Substrate Classification:

There are three primary types of substrates used in color-coated steel coils:

1. Hot-Dip Galvanized Substrate – Produced by immersing steel sheets in a molten zinc bath, forming a protective zinc coating on the surface.

2. Hot-Dip Aluminized Zinc Substrate (e.g., 55% Aluminum, 45% Zinc)– Created by hot-dipping steel sheets in a molten alloy of aluminum and zinc, followed by baking and curing to enhance durability.

3. Electrogalvanized Substrate– Formed through an electroplating process that deposits a layer of zinc onto the steel surface.

Each substrate offers distinct corrosion resistance and performance properties tailored to different applications.

Color-coated Steel Coil Advantages

1. Corrosion Resistance

The aluminum-zinc alloy coating provides excellent protection against corrosion even in highly corrosive environments near coastlines or industrial areas.

2. Durability

When combined with a durable paint finish, PPGL steel sheets can last over 25 years with only nominal maintenance under normal weather conditions.

3. Strength and Support

PPGL steel is strong yet lightweight. It can support heavy loads and withstand high wind loads making it suitable for roofing and cladding applications in commercial buildings.

Color-coated Steel Coil Applications:

1. Roofing
PPGL steel is extensively used for roofing in industrial, commercial, and residential construction due to its exceptional corrosion resistance and long-term durability.

2. Cladding
Thanks to its high-quality color-coated finishes, PPGL steel is a popular choice for exterior wall cladding and facades, maintaining visual appeal and structural integrity for decades.

3. Rainwater Goods
PPGL steel profiles are widely used to fabricate rain gutters, downpipes, flashings, and other rainwater management systems, offering reliable weather resistance and longevity.

4. Industrial Siding
PPGL steel panels are an ideal solution for warehouses, factories, and agricultural sheds, combining impact resistance, fire safety (non-combustibility), and low maintenance.

5. Agricultural Buildings
PPGL sheets provide a cost-effective and weather-resistant solution for farm structures such as sheds, barns, and stables, ensuring protection against harsh environmental conditions.

Standard Seaworthy Export Packing:

Color-coated coils are typically packed and shipped in a way that ensures their protection during transportation and handling. Common types of packing include coil packaging with edge protectors and VCI (volatile corrosion inhibitor) paper, followed by secure bundling with steel straps or wrapping with plastic film.

FAQ:

Q1:What are your company's main products ?
A1: Our main products are GI & GL & PPGI & PPGL steel coil / sheet / plate / strip coil, currugated galvanized steel sheet, angle bar, c channel

Q2. How do you control quality ?
A2: Mill Test Certification is supplied with shipment, Third Party Inspection is available.

Q3. What are the advantages of your company ?
A3: We have many professionals, technical personnel, more competitive prices and best after-dales service than other steel companies.