JIS Standard Hot Dipped Galvanized Steel Sheet Z275 Q235 Q345 for Structural and Fabrication Applications

JIS Standard Hot Dipped Galvanized Steel Sheet Z275 Q235 Q345 for Structural and Fabrication Applications

1. Product Overview

Hot dipped galvanized steel sheet is produced from galvanized steel coil through cut-to-length processing and is widely used in structural fabrication and industrial manufacturing.

In practical applications, common challenges include:

• Corrosion under humid or outdoor exposure

• Surface condition affecting coating or forming quality

• Dimensional stability influencing fabrication accuracy

These factors directly impact service life and processing efficiency.

2. Technical Solution

The performance of galvanized steel sheet is determined by the combination of base steel and zinc coating layer.

Key technical characteristics:

• Zinc coating range: 40–450 g/m²

• Sacrificial corrosion protection mechanism

• Surface treatment improves oxidation resistance and process stability

Q235 and Q345 grades provide different strength levels to meet general forming and structural requirements.

3. Specifications

4. Application

• Structural fabrication

• Sheet metal processing

• Home appliances

• Industrial equipment

5. Processing / Usage

• Cut from galvanized steel coil

• Cutting or stamping

• Bending or welding

• Applied in fabrication or manufacturing

6. Advantages

• Zinc coating up to 450 g/m² for corrosion protection

• Wide thickness and width range

• Suitable for forming, welding, and coating processes

• Stable dimensional accuracy from continuous coil processing

7. How to Choose

• Use Z275 or higher for outdoor applications

• Use lower coating levels for indoor environments

• Select steel grade based on strength requirements

• Choose surface type according to coating or forming process

8. FAQ

Q1: What is the relation between GI coil and sheet?
GI sheet is produced from GI coil through cut-to-length processing.

Q2: Can the size be customized?
Yes, length can be customized based on project requirements.

Q3: What surface should be selected?
Zero spangle is suitable for painting, while regular spangle is used for structural applications.