S220GD S250GD S280GD EGI Steel Coil 0.75mm Phosphate Treatment Electro Galvanized Steel Sheet

１．Product Overview

S220GD, S250GD, and S280GD Electro Galvanized Steel Coils are designed for applications requiring a combination of corrosion resistance, formability, and structural strength. The electro galvanized coating provides a smooth and uniform surface, while phosphate treatment improves paint adhesion and processing performance.

These steel coils are widely used in construction, appliance manufacturing, electrical equipment, automotive components, and industrial fabrication where reliable corrosion protection and consistent quality are required.

２．Technical Solution

The steel substrate is electro galvanized to form a controlled zinc coating layer that protects against atmospheric corrosion. The phosphate-treated surface enhances coating adhesion and improves performance during painting, stamping, and forming operations.

The S220GD, S250GD, and S280GD grades offer different strength levels, allowing manufacturers to select the most suitable material according

to load-bearing and fabrication requirements.

３．Specifications

４．Application

The product is suitable for roofing accessories, wall systems, ventilation components, electrical cabinets, household appliances, automotive parts, industrial equipment housings, storage systems, furniture manufacturing, and general engineering applications.

５．Processing

The material can be slit, cut to length, stamped, bent, punched, welded, painted, and assembled. The phosphate-treated surface provides good compatibility with painting and powder coating systems.

６．Advantages

• Smooth and uniform electro galvanized surface
• Reliable corrosion resistance with zinc coating protection
• Good formability and fabrication performance
• Phosphate treatment enhances paint adhesion
• Available in multiple structural grades
• Suitable for appliance and industrial applications
• Stable quality and dimensional consistency

７．How to Choose

• Choose S220GD for general forming applications.
• Select S250GD for balanced strength and workability.
• Use S280GD when higher structural strength is required.
• Consider coating weight according to environmental exposure.
• Verify processing requirements before selecting steel grade.

８．FAQ

Q1．What grades are available for this product
The product series includes S220GD, S250GD, and S280GD grades.

Q2．What is the zinc coating of this specification
The listed specification is supplied with a 70g/m² zinc coating.

Q3．What is the purpose of phosphate treatment
Phosphate treatment improves paint adhesion, corrosion performance, and surface durability.

Q4．Can this material be used for structural applications
Yes, S220GD, S250GD, and S280GD are commonly used in construction and structural fabrication.

Q5．What is the maximum coil weight
The maximum coil weight is 5MT.