1. Material Standards & Designation

Primary Standard:

• EN 10346 - Continuously hot-dip coated steel flat products

Designation Explanation:

• S350GD: Structural steel with minimum yield strength of 350 MPa

• +AZ: Aluminum-zinc alloy coating (55% Al-Zn)

• Equivalent to: AZ150 (International equivalent)

2. Chemical Composition (% by weight)

3. Mechanical Properties

4. Coating Specifications

5. Physical Properties

6. Product Specifications

7. Surface Characteristics

Coating Structure:

• 80% Aluminum-rich phase

• 20% Zinc-rich interdendritic phase

• Silicon content: 1.6% for coating adhesion

Surface Features:

• Characteristic spangle pattern

• Silver-gray appearance

• Smooth, uniform coating

• Excellent heat resistance (up to 315°C continuous)

8. Testing & Inspection

Mandatory Tests:

• Tensile test (EN ISO 6892-1)

• Bend test (EN ISO 7438)

• Coating mass measurement (EN 10346)

• Chemical analysis (EN 10204 2.2/3.1)

• Adhesion test

• Surface inspection

• Dimensional inspection

Optional Tests:

• Salt spray test (EN ISO 9227)

• Cyclic corrosion test

• Heat resistance test

• Microstructure examination

• Third-party inspection

9. Applications

Primary Applications:

• Building & Construction: Structural roofing, load-bearing wall panels

• Industrial Buildings: Factory structures, warehouse frameworks

• HVAC Systems: High-temperature ducts, heat exchangers

• Transportation: Truck trailers, container bodies

• Agricultural: Heavy-duty grain storage, farm equipment

• Energy Sector: Solar panel supports, power plant components

Special Advantages:

• 2-4 times better corrosion resistance than galvanized steel

• Excellent heat resistance and thermal reflectivity

• Higher strength-to-weight ratio

• Suitable for high temperature applications

• Long service life in corrosive environments