Electro Galvanized Steel Roll Forming Material Guide: Coil Sizes, Thickness & Applications

Electro Galvanized Steel Roll Forming Material

1. Overview of Electro Galvanized Steel in Roll Forming

Electro galvanized steel (EG steel) is a zinc-coated steel produced through an electroplating process rather than hot dipping. This method applies a thin, uniform layer of zinc onto the steel surface, resulting in a smooth and highly consistent finish.

In roll forming, electro galvanized steel is typically used for applications where surface appearance, precision, and paint adhesion are more important than heavy corrosion resistance. It is commonly used in automotive components, appliance panels, and interior construction products.

Compared to hot dip galvanized steel, electro galvanized steel has a thinner coating and is generally used in indoor or controlled environments rather than exposed outdoor conditions.

2. Material Composition & Structure

Electro galvanized steel consists of:

Steel base (usually cold rolled steel)
Zinc coating applied via electroplating

Layer Structure:

Steel core
Thin zinc coating (uniform layer)

Unlike hot dip galvanizing, there is no thick alloy layer, resulting in a smoother and more controlled surface.

3. Available Coil Specifications

Thickness Range

0.3mm – 2.5mm

Coil Width

600mm – 1500mm

Coil Weight

3 tons – 12 tons

Coil ID / OD

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

Tolerance

Tight thickness tolerance: ±0.01–0.03mm
Excellent flatness and surface consistency

4. Mechanical Properties

Typical values:

Yield Strength: 220 – 500 MPa
Tensile Strength: 320 – 650 MPa
Elongation: 15% – 30%
Hardness: 120 – 200 HB

Available grades similar to cold rolled steel.

5. Coating Types

Electro Zinc Coating (ZE)

ZE25
ZE50
ZE75

Coating Thickness

Typically 2–10 microns (much thinner than hot dip galvanized)

Lifespan

Indoor: long-term durability
Outdoor: limited corrosion protection

Cost Level

Medium

6. Surface Finishes

Smooth, uniform finish
Bright surface
Matte finish
Ideal surface for painting or coating

This is one of the cleanest finishes available in coated steel.

7. Common Roll Forming Applications

Electro galvanized steel is used in:

Automotive components
Appliance panels
Electrical enclosures
Office furniture
Light gauge framing (indoor use)
Cable trays
HVAC components

8. Advantages of Electro Galvanized Steel

Very smooth surface finish
Excellent for painting and coating
Uniform zinc layer
High dimensional accuracy
Good formability
Ideal for precision applications

9. Disadvantages / Limitations

Lower corrosion resistance than hot dip galvanized
Not suitable for outdoor exposure
Thin coating offers limited protection
Slightly higher cost than bare cold rolled steel

10. Roll Forming Machine Considerations

Roll Tooling

Smooth, polished rollers required
Chrome plating recommended

Speed

20–60 m/min

Lubrication

Minimal lubrication required

Cutting

Clean cutting with hydraulic or flying shear

Common Issues

Surface scratching
Coating damage from poor tooling
Marking if rollers are worn

11. Common Problems in Production

Scratches affecting appearance
Surface contamination before painting
Coil handling damage
Minor coating wear during forming
Inconsistent finish if tooling is poor

12. Pricing Guide

Typical global pricing:

Low: $800–$1000 per ton
Medium: $1000–$1300 per ton
High: $1300–$1600+ per ton

Factors affecting price:

Coating thickness
Steel grade
Surface quality
Origin

13. Comparison with Other Materials

Electro Galvanized vs Hot Dip Galvanized

Electro = thinner coating, smoother finish
Hot dip = thicker coating, better corrosion resistance

Electro Galvanized vs Cold Rolled Steel

Electro = corrosion protection + smooth surface
Cold rolled = no coating

Electro Galvanized vs PPGI

Electro = base coated steel
PPGI = painted version

14. Best Industries Using Electro Galvanized Steel

Automotive manufacturing
Electrical equipment
Appliance production
Office furniture
Indoor construction systems

15. How to Choose Electro Galvanized Steel

Choose When:

Surface finish is critical
Painting is required
Indoor use
Precision roll forming

Avoid When:

Outdoor exposure is expected
Heavy corrosion resistance is required

16. FAQ Section

What is electro galvanized steel?

It is steel coated with zinc using an electroplating process.

Is it suitable for outdoor use?

Not recommended due to thin coating.

What thickness is typical?

0.3mm to 2.5mm.

Is it better than hot dip galvanized steel?

It is smoother but less corrosion resistant.

Can it be painted?

Yes, it is ideal for painting applications.

17. Machine Matcher Section

We supply roll forming machines for all material types including electro 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
0.3–2.5mm

Yield Strength
220–500 MPa

Coil Width
600–1500mm

Coil ID
508 / 610mm