Aluzinc Steel Roll Forming Material Guide: AZ Coating, Coil Sizes & Applications

Aluzinc Steel Roll Forming Material

1. Overview of Aluzinc Steel in Roll Forming

Aluzinc steel is a coated steel material featuring an aluminum-zinc alloy coating applied to a cold rolled steel base. It is widely known globally as Aluzinc, while in some regions (especially the USA) it is referred to as Galvalume.

The coating typically consists of 55% aluminum, 43.4% zinc, and 1.6% silicon, combining the corrosion resistance of aluminum with the sacrificial protection of zinc.

In roll forming, Aluzinc steel is one of the most commonly used materials for roofing and cladding due to its long lifespan, heat reflectivity, and excellent outdoor performance.

2. Material Composition & Structure

Aluzinc steel consists of:

• Steel base (cold rolled steel)
• Aluminum-zinc alloy coating

Coating Composition:

• 55% Aluminum
• 43.4% Zinc
• 1.6% Silicon

Layer Structure:

1. Steel core
2. Aluminum-zinc coating
3. Protective oxide layer (self-forming)

3. Available Coil Specifications

Thickness Range

• 0.3mm – 3.0mm

Coil Width

• 600mm – 1250mm (up to 1500mm available)

Coil Weight

• 3 tons – 12 tons

Coil ID / OD

• ID: 508mm / 610mm
• OD: up to 1500mm

Tolerance

• Tight thickness tolerance
• Excellent flatness for roll forming

4. Mechanical Properties

Typical values:

• Yield Strength: 230 – 550 MPa
• Tensile Strength: 300 – 700 MPa
• Elongation: 15% – 30%
• Hardness: 120 – 200 HB

Grades:

• AZ50 / AZ100 / AZ150
• S320GD / S350GD

5. Coating Types

Aluzinc (AZ Coating)

• AZ50 (light coating)
• AZ100
• AZ150 (standard)

Coating Thickness

• AZ150 ≈ 20–25 microns

Lifespan

• Indoor: 30+ years
• Outdoor: 20–40+ years

Cost Level

• Medium

6. Surface Finishes

• Smooth metallic finish
• Fine spangle pattern
• Reflective surface
• Suitable for painting (PPGL base)

7. Common Roll Forming Applications

Aluzinc steel is used in:

• Roofing panels (standing seam, trapezoidal, corrugated)
• Wall cladding systems
• Industrial and commercial buildings
• Agricultural structures
• Gutters and drainage systems
• Solar mounting systems
• Structural panels

8. Advantages of Aluzinc Steel

• Excellent corrosion resistance
• Superior heat reflectivity
• Long service life
• Lightweight and strong
• Ideal for roofing and cladding

9. Disadvantages / Limitations

• Not ideal for marine/coastal exposure without coating
• Higher cost than galvanized steel
• Can crack in tight forming radii
• Edge protection weaker than full zinc coatings

10. Roll Forming Machine Considerations

Roll Tooling

• Chrome plated rollers required
• Smooth surfaces to protect coating

Speed

• 15–60 m/min

Lubrication

• Typically not required

Cutting

• Hydraulic or flying shear
• Clean cutting essential

Common Issues

• Edge cracking
• Surface scratches
• Coating damage during forming

11. Common Problems in Production

• Edge corrosion in exposed cuts
• Oil canning in roofing panels
• Surface marking from tooling
• Coil camber affecting tracking
• Handling damage

12. Pricing Guide

Typical global pricing:

• Low: $900–$1100 per ton
• Medium: $1100–$1400 per ton
• High: $1400–$1800+ per ton

Factors affecting price:

• Coating level (AZ50, AZ150)
• Thickness
• Steel grade
• Supplier and region

13. Comparison with Other Materials

Aluzinc vs Galvalume

• Same material (different regional naming)

Aluzinc vs Galvanized Steel

• Aluzinc = better corrosion resistance
• Galvanized = cheaper

Aluzinc vs Aluminum

• Aluzinc = stronger
• Aluminum = lighter and more corrosion resistant

14. Best Industries Using Aluzinc Steel

• Construction and roofing
• Industrial buildings
• Agriculture
• Solar energy
• Infrastructure

15. How to Choose Aluzinc Steel

Choose Aluzinc When:

• Roofing applications
• Outdoor environments
• Long lifespan required
• Heat reflection is important

Avoid When:

• Coastal environments without coating
• Tight forming profiles
• Budget is limited

16. FAQ Section

What is Aluzinc steel?

It is steel coated with an aluminum-zinc alloy.

Is Aluzinc the same as Galvalume?

Yes, it is the same material with different names.

What is AZ150?

A coating weight of 150 g/m².

Is Aluzinc good for roofing?

Yes, it is widely used in roofing.

Can Aluzinc be painted?

Yes, it is used as a base for PPGL.

17. Machine Matcher Section

We supply roll forming machines for all material types including Aluzinc steel.

• Custom-built machines to your profile
• New machines built to specification
• Global delivery available
• UK and USA technical support

Contact:
Machine Matcher
Sales & Technical Team

Quick Specs

Thickness
0.3–3.0mm

Yield Strength
230–550 MPa

Coil Width
600–1250mm

Coil ID
508 / 610mm