Silicon Steel Coils
Silicon Steel Coils
Call 0121 544 5808 Today
Bespoke Manufacturing
Instant Quote Service
Worldwide Delivery
Various Gauges/Thicknesses
Bespoke Manufacturing
Instant Quote Service
Worldwide Delivery
Various Gauges/Thicknesses
Stephens Gaskets is a leading UK manufacturer and supplier of Silicon Steel Coils, producing high-quality grain-oriented (CRGO) and non-grain-oriented (CRNGO) grades for the transformer, motor, generator, and EV industries.
Our coils are engineered for exceptional magnetic performance, low core losses, and high electrical efficiency – meeting the growing demands of sustainable power systems and electrified transport.
What Are Silicon Steel Coils?
A Silicon Steel Coil is a rolled form of electrical steel, designed to provide high magnetic permeability and low energy loss.
The addition of 0.5-3.2% silicon increases resistivity, minimises eddy currents, and enhances performance in AC magnetic fields.
Types of Silicon Steel Coils
- CRGO (Cold-Rolled Grain-Oriented): Optimised for magnetic flux in one direction – perfect for power transformers.
- CRNGO (Cold-Rolled Non-Grain-Oriented): Uniform magnetic properties in all directions – ideal for motors, generators, and EV drives.
Steel is coiled for ease of transport, storage, and precision fabrication, ready to be slit or cut into laminations for magnetic cores.
Benefits of Silicon Steel Coils
| Benefit | Impact |
|---|---|
| High Magnetic Permeability | Enhances magnetic flux flow, improving efficiency. |
| Low Core Losses | Reduces wasted energy as heat in AC applications. |
| Noise Reduction | Minimises magnetostriction – quieter operation. |
| High Saturation Magnetisation | Handles stronger fields without loss of performance. |
| Fabrication Flexibility | Coils can be slit or stamped into laminations. |
| Sustainability | Improves energy efficiency and reduces carbon footprint. |
Applications of Silicon Steel Coils
| Application | Type | Function |
|---|---|---|
| Power Transformers | CRGO | Reduces core losses and improves magnetic efficiency |
| Distribution Transformers | CRGO | Ensures efficient energy transmission in grid systems |
| Electric Motors | CRNGO | Reduces eddy current losses and improves torque efficiency |
| Generators & Alternators | CRNGO | Enhances energy conversion and thermal stability |
| Electric Vehicles (EVs) | CRNGO | Boosts range and performance in traction motors |
| Inductors & Magnetic Coils | CRNGO | Provides stable, efficient magnetic energy storage |
| Industrial Machinery | CRNGO | Improves efficiency in high-power motors and pumps |
Industry-Specific Materials
Stephens Gaskets supplies CRGO and CRNGO coils along with compatible materials for electrical manufacturing:
| Material | Use | Advantage |
|---|---|---|
| CRGO Silicon Steel | Transformers | Directional grain = very low core losses. |
| CRNGO Silicon Steel | Motors & Generators | Uniform magnetic performance. |
| Ferrites | High-Frequency Transformers | Ideal for fast-switching electronics. |
| Copper | Windings | High conductivity for reduced energy loss. |
| Aluminium | Conductors | Lightweight and corrosion-resistant |
Industry Pain Points (and How We Solve Them)
| Pain Point | Stephens Gaskets’ Solution |
|---|---|
| High Material Cost | In-house processing keeps prices competitive. |
| Brittleness | Precision rolling and handling minimise cracking. |
| Complex Manufacturing | Automated cold rolling ensures grain uniformity. |
| Magnetic Aging | Controlled annealing preserves long-term efficiency. |
| High-Frequency Losses | Custom CRNGO grades designed for higher frequencies. |
| Coating/Insulation Issues | Quality-tested coatings prevent shorting and loss. |
| Supply Chain Risk | UK manufacturing base ensures secure, fast supply. |
FAQs – Silicon Steel Coils
What are silicon steel coils used for?
They’re used in transformers, motors, generators, EVs, and magnetic cores where efficiency and low loss are critical.
What's the difference between CRGO and CRNGO?
CRGO is optimised for one direction (transformers), while CRNGO has uniform magnetic properties (motors and generators).
Do silicon steel coils reduce energy losses?
Yes – they reduce both hysteresis and eddy current losses, improving energy efficiency.
Can Stephens Gaskets supply custom coil widths?
Yes – we offer custom slitting, punching, and cutting for tailored lamination designs.
Do you provide coatings or insulation?
All coils can be supplied with insulation coatings to prevent shorting and enhance corrosion resistance.
Stephens Gaskets is the UK’s trusted Silicon Steel Coil manufacturer and supplier.
We combine decades of engineering experience with precision manufacturing to deliver high-quality CRGO and CRNGO electrical steels – every time.
Call: 0121 544 5808 | Email: sales@stephensgaskets.co.uk
Request a quote for Silicon Steel Coils today.