Grain Oriented Electrical Steel Roll Forming Material Guide (GO Steel)

Grain Oriented Electrical Steel Roll Forming Material

1. Overview of Grain Oriented Electrical Steel in Roll Forming

Grain Oriented Electrical Steel (GO Steel) is a highly specialized silicon steel engineered so that its crystal grain structure is aligned in one direction. This alignment allows extremely high magnetic efficiency along the rolling direction.

In roll forming, GO steel is used mainly in transformer core production, where energy loss must be minimized.

Compared to non-grain oriented steel, GO steel offers significantly lower core loss and higher magnetic permeability, making it essential for power transmission and distribution equipment.

2. Material Composition & Structure

GO electrical steel consists of:

Iron base metal
Silicon content (typically 2.5% – 3.5%)
Very low carbon content

Key Feature

Grain structure aligned in rolling direction

Important Note

Material must be formed in correct direction to maintain performance

3. Available Coil Specifications

Thickness Range

0.23mm – 0.50mm

Coil Width

600mm – 1200mm

Coil Weight

2 tons – 6 tons

Coil ID / OD

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

Tolerance

Extremely tight tolerances
High precision thickness control

4. Mechanical Properties

Typical values:

Yield Strength: 300 – 450 MPa
Tensile Strength: 350 – 600 MPa
Elongation: 8% – 20%
Hardness: 140 – 220 HB

5. Coating Types

GO steel is supplied with:

Insulation coatings (C2, C5, etc.)
Tension coatings
Oxide coatings

Purpose

Reduce eddy current losses
Improve magnetic efficiency
Provide insulation between laminations

6. Surface Finishes

Smooth insulated finish
Oxide-coated surface
Tension-coated surface

7. Common Roll Forming Applications

Transformer cores
Power transformers
Distribution transformers
Electrical laminations
Magnetic core assemblies

8. Advantages of Grain Oriented Electrical Steel

Extremely low core loss
High magnetic permeability
Superior energy efficiency
Ideal for transformer applications
Consistent performance

9. Disadvantages / Limitations

Very high cost
Directional material (limited forming flexibility)
Sensitive to mechanical stress
Requires precise handling
Limited use outside electrical applications

10. Roll Forming Machine Considerations

Roll Tooling

Precision rollers required
Surface protection essential

Direction Control

Must maintain rolling direction alignment

Speed

5–15 m/min

Lubrication

Not recommended

Cutting

High precision cutting required

Common Issues

Loss of magnetic properties due to stress
Coating damage
Edge burr formation

11. Common Problems in Production

Magnetic performance reduction due to stress
Insulation coating damage
Edge burrs affecting lamination stacking
Surface scratches
Misalignment during forming

12. Pricing Guide

Typical global pricing:

Low: $1800–$2500 per ton
Medium: $2500–$3500 per ton
High: $3500–$5000+ per ton

Factors affecting price:

Grade quality
Thickness
Coating type
Supplier

13. Comparison with Other Materials

GO vs Non-Grain Oriented Steel

GO = directional magnetic properties
NGO = uniform magnetic properties

GO vs Mild Steel

GO = magnetic optimized
Mild = structural

GO vs Silicon Steel (General)

GO = premium type of silicon steel

14. Best Industries Using GO Steel

Power generation
Electrical equipment manufacturing
Transformer production
Energy infrastructure
Industrial electrical systems

15. How to Choose Grain Oriented Electrical Steel

Choose GO Steel When:

Transformer cores required
Maximum efficiency needed
Magnetic performance critical
Energy loss must be minimized

Avoid When:

Structural applications
Flexible forming required
Cost-sensitive projects

16. FAQ Section

What is grain oriented electrical steel?

A silicon steel with aligned grain structure for magnetic efficiency.

Where is GO steel used?

Mainly in transformers.

Why is it directional?

To improve magnetic performance in one direction.

Can it be roll formed?

Yes, but requires precision setup.

Why is it expensive?

Due to complex manufacturing and performance benefits.

17. Machine Matcher Section

We supply roll forming machines for all material types including grain oriented electrical 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
0.23–0.50mm

Yield Strength
300–450 MPa

Coil Width
600–1200mm

Coil ID
508 / 610mm