1. Product Overview

Hot dipped galvanized steel coils are produced by immersing cold rolled steel into molten zinc to form a protective coating layer. This zinc layer improves resistance to corrosion in environments where moisture, airflow, and temperature variation are present, such as HVAC and ventilation systems.

In duct manufacturing and air system fabrication, coating uniformity, forming performance, and dimensional stability are key factors. Coil supply supports efficient downstream production through slitting and cut-to-length processing.

2. Technical Solution

The product performance is based on:

• Hot dip galvanizing process with continuous coating control
• Zinc layer acting as barrier protection
• Sacrificial protection of zinc against corrosion
• Controlled mechanical properties for forming and fabrication

Yield strength 195–420 MPa ensures structural stability, while elongation 12–25% supports bending, rolling, and locking operations in HVAC fabrication.

3. Specifications

4. Application

• HVAC duct systems
• Ventilation and air distribution channels
• Equipment housings and panels
• Industrial sheet metal fabrication
• Building service components
• Appliance panels and enclosures

5. Processing

• Coil slitting into strips
• Cut-to-length into sheets
• Roll forming for duct sections
• Bending and forming
• Lock forming and flanging

6. Advantages

• Wide thickness range covering light and heavy gauge applications
• Flexible zinc coating selection for different environments
• Good forming performance for duct fabrication
• Multiple surface treatment options for storage and processing
• Coil format improves production efficiency

7. How to Choose

• Indoor ventilation → standard coating levels
• Humid or exposed environments → higher zinc coating
• Painting applications → anti-fingerprint or chromated surface
• Forming-intensive processing → balanced strength and elongation
• Continuous production → select suitable coil weight and ID

8. FAQ

Q1: Is this material suitable for HVAC duct manufacturing?
Yes, it is widely used for ventilation ducts and air handling systems.

Q2: Can coils be supplied as sheets?
Yes, coils can be cut into sheets or slit into strips based on requirements.

Q3: Which surface treatment is recommended?
Chromated or oiled surfaces are commonly used depending on storage and processing needs.

Q4: How to select zinc coating level?
It depends on service environment and required corrosion resistance.

Q5: What coil sizes are available?
Standard coil IDs of 508 mm and 610 mm are available for most processing equipment.