Z180 Galvanized Steel Roll Forming Material Guide: Coating Thickness, Coil Sizes & Uses

Z180 Galvanized Steel Roll Forming Material

1. Overview of Z180 Galvanized Steel in Roll Forming

Z180 galvanized steel is a zinc-coated steel with a coating weight of 180 g/m² (total both sides). It is considered a medium coating level, offering improved corrosion resistance compared to Z100 while remaining more cost-effective than Z275 and higher coatings.

In roll forming, Z180 steel is commonly used in applications where moderate corrosion resistance is required but full heavy-duty protection is not necessary. It is widely used in semi-exposed environments, light construction, and industrial applications.

Z180 is typically produced using the hot dip galvanizing process and is based on a cold rolled steel substrate, ensuring consistent thickness and surface quality suitable for roll forming.

2. Material Composition & Structure

Z180 galvanized steel consists of:

• Steel base (cold rolled steel)
• Zinc coating (180 g/m² total both sides)

Layer Structure:

1. Steel core
2. Zinc coating (approx. 12–13 microns total)

Surface Types:

• Regular spangle
• Minimized spangle
• Zero spangle

3. Available Coil Specifications

Thickness Range

• 0.3mm – 3.5mm

Coil Width

• 600mm – 1500mm

Coil Weight

• 3 tons – 15 tons

Coil ID / OD

• ID: 508mm / 610mm
• OD: up to 1600mm

Tolerance

• Thickness tolerance: ±0.02–0.04mm
• Good flatness for roll forming

4. Mechanical Properties

Typical values:

• Yield Strength: 250 – 550 MPa
• Tensile Strength: 350 – 700 MPa
• Elongation: 15% – 30%
• Hardness: 120 – 200 HB

Grades available:

• DX51D (forming grade)
• S320GD / S350GD (structural grades)

5. Coating Types

Zinc Coating (Z180)

• 180 g/m² total

Coating Thickness

• Approx. 12–13 microns

Lifespan

• Indoor: 20–30+ years
• Outdoor: 5–15 years depending on environment

Cost Level

• Medium-low

6. Surface Finishes

• Regular spangle
• Minimized spangle
• Zero spangle
• Smooth finish for further processing

7. Common Roll Forming Applications

Z180 galvanized steel is used in:

• Light roofing systems (non-coastal areas)
• Wall cladding panels
• Steel framing
• Cable trays and supports
• HVAC ducting
• Agricultural buildings
• Storage systems

8. Advantages of Z180 Galvanized Steel

• Better corrosion resistance than Z100
• Lower cost than Z275
• Good balance between cost and performance
• Suitable for semi-exposed environments
• Good formability

9. Disadvantages / Limitations

• Not as durable as Z275 or Z450
• Limited lifespan in harsh outdoor conditions
• Edge protection still limited
• Not ideal for coastal or high humidity areas

10. Roll Forming Machine Considerations

Roll Tooling

• Chrome plated rollers recommended
• Smooth surfaces to protect coating

Speed

• 20–60 m/min

Lubrication

• Typically not required

Cutting

• Hydraulic or flying shear
• Sharp blades to reduce burrs

Common Issues

• Zinc cracking in tight bends
• Surface scratching
• Coating damage from poor tooling

11. Common Problems in Production

• White rust due to improper storage
• Surface scratches during forming
• Uneven coating affecting appearance
• Coil camber affecting alignment
• Edge corrosion in exposed areas

12. Pricing Guide

Typical global pricing:

• Low: $700–$900 per ton
• Medium: $900–$1100 per ton
• High: $1100–$1300+ per ton

Factors affecting price:

• Coating weight
• Thickness
• Steel grade
• Supplier and origin

13. Comparison with Other Materials

Z180 vs Z100

• Z180 = better corrosion resistance
• Z100 = cheaper

Z180 vs Z275

• Z180 = lower cost
• Z275 = industry standard for outdoor use

Z180 vs Z450

• Z180 = medium protection
• Z450 = heavy-duty protection

14. Best Industries Using Z180 Galvanized Steel

• Construction and light industrial buildings
• Agriculture
• HVAC systems
• Storage and warehousing
• General fabrication

15. How to Choose Z180 Galvanized Steel

Choose Z180 When:

• Moderate corrosion resistance is needed
• Semi-exposed environments
• Cost needs to be controlled
• Standard construction applications

Avoid When:

• Coastal or harsh environments
• Long-term outdoor exposure
• Heavy-duty structural applications

16. FAQ Section

What does Z180 mean?

It refers to 180 g/m² zinc coating weight.

Is Z180 suitable for roofing?

Yes, in non-coastal or moderate environments.

Is it better than Z100?

Yes, it offers better corrosion resistance.

Is Z180 cheaper than Z275?

Yes, it is slightly cheaper.

Can it be used outdoors?

Yes, but only in moderate environments.

17. Machine Matcher Section

We supply roll forming machines for all material types including Z180 galvanized 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
0.3–3.5mm

Yield Strength
250–550 MPa

Coil Width
600–1500mm

Coil ID
508 / 610mm