１．Product Overview

S550GD Electro Galvanized Steel Coil is designed for applications requiring higher strength, reliable corrosion protection, and consistent surface quality. The electro galvanized coating provides a smooth appearance and controlled zinc layer, while phosphate treatment enhances surface protection and coating adhesion.

This product is widely used in construction systems, appliance manufacturing, transportation equipment, industrial components, and storage applications where strength and corrosion resistance are important.

２．Technical Solution

The steel substrate is processed through an electro-galvanizing line to achieve a uniform zinc coating and excellent surface finish. The phosphate-treated surface improves paintability and supports secondary processing such as stamping, bending, roll forming, and welding.

The combination of S550GD high-strength steel and zinc protection provides good load-bearing capability together with long-term durability in indoor and protected outdoor environments.

３．Specifications

４．Application

The product is suitable for anti-corrosion roofing accessories, structural building components, household appliance housings, refrigeration equipment, ventilation systems, automotive parts, industrial cabinets, storage systems, packaging equipment, machinery components, and furniture manufacturing.

５．Processing

The material can be processed through slitting, cut-to-length production, bending, punching, stamping, roll forming, welding, painting, and assembly operations. The smooth galvanized surface supports further coating and finishing processes.

６．Advantages

• High-strength S550GD steel substrate
• Uniform electro galvanized coating
• Good corrosion resistance performance
• Excellent formability and weldability
• Phosphate treatment improves paint adhesion
• Stable dimensional accuracy
• Suitable for structural and industrial applications

７．How to Choose

• Choose S550GD when higher strength is required compared with standard galvanized grades.
• Select zinc coating levels according to environmental exposure conditions.
• Choose phosphate-treated material when painting or powder coating is required.
• Confirm thickness and width according to fabrication requirements.
• Select regular spangle finish for general industrial applications.

８．FAQ

Q1．What steel grade is used for this product
The listed specification is supplied with a DX51D grade substrate and can be produced in S550GD high-strength grades.

Q2．What is the zinc coating level
The listed specification has a zinc coating of 100g/m².

Q3．What surface treatment is available
The product is supplied with phosphate treatment.

Q4．What are the dimensions of this specification
The listed size is 0.90mm thickness and 1250mm width.

Q5．What applications are suitable for this product
It is suitable for construction, appliances, transportation equipment, industrial machinery, storage systems, and anti-corrosion structural applications.