CRGO Silicon Electrical Steel Coil 0.35mm Thickness For Transformer

At GNEE, we understand that the core of your transformer determines its reliability, efficiency, and lifespan. As a leading supplier of grain-oriented electrical steels, we provide global transformer manufacturers with premium 0.35mm CRGO Silicon Electrical Steel Coil that minimizes core losses and maximizes magnetic flux density. Whether you are producing distribution transformers, power transformers, or reactor cores, our 0.35mm thickness CRGO steel offers the perfect balance between stackability and eddy current reduction.

 

0.35mm CRGO silicon steel coil 

 

 

The high silicon content is the secret to low hysteresis loss. Our 0.35mm CRGO Silicon Electrical Steel Coil maintains tight chemistry controls:

Element	Content (%)	Role in Performance
Silicon (Si)	2.9% – 3.3%	Increases electrical resistivity; reduces eddy currents.
Carbon (C)	≤ 0.003%	Prevents magnetic aging.
Manganese (Mn)	0.03 – 0.10%	Combines with sulfur to prevent hot brittleness.
Sulfur (S)	≤ 0.001%	Minimized to avoid grain boundary weakening.
Aluminum (Al)	0.005 – 0.015%	Acts as a deoxidizer and nitride former.

 

 

To ensure smooth punching and stacking, our 0.35mm CRGO Silicon Electrical Steel Coil maintains these mechanical values:

Property	Value	Importance
Tensile Strength	340 – 360 MPa	Resists breakage during high-speed stamping.
Yield Strength	305 – 325 MPa	Ensures flat laminations after cutting.
Elongation	8 – 12%	Allows for slight bending during core assembly.
Hardness (HV)	180 – 210	Prevents burr formation on punching dies.
Lamination Factor	≥ 97%	Maximizes core density and reduces excitation current.

 

 

Cost-Effective Performance Balance

• Lower Production Cost: Thinner coils (0.23mm) require more rolling passes, increasing price. Our 0.35mm CRGO offers 90% of the magnetic performance at 70% of the cost.
• Reduced Punching Burr: The optimal hardness of 0.35mm steel extends die life by 40% compared to ultra-thin grades.

 

Global Compliance and Energy Efficiency

Using our 0.35mm CRGO Silicon Electrical Steel Coil helps your transformers meet:

• MEPS (Minimum Energy Performance Standards) for Level 1 and Level 2 efficiency.
• IEEE C57.12.00 for no-load loss limits.
• IEC 60076 noise reduction requirements (Grain orientation reduces magnetostriction).

 

Reliable Insulation Coating

Every coil features a Tensile Insulating Coating (T2, T3, or T4 grade):

• Surface Resistivity: > 300 Ω·cm²/cm² (single side).
• Withstands 800V insulation test.

The coating is heat resistant up to 820°C for stress relief annealing.

 

 

The versatility of 0.35mm CRGO Silicon Electrical Steel Coil thickness makes it the backbone of modern electrical grids. Typical applications include:

• Oil-immersed Distribution Transformers (10kV – 35kV): Where low no-load loss is critical.
• Dry-type Transformers: Where the 0.35mm thickness reduces audible noise.
• Reactor Cores: For harmonic filtering in VFDs and HVDC systems.
• Current Transformers (CT) and Potential Transformers (PT): High permeability ensures accurate metering.
• Welding Machines & UPS Systems: For reliable energy storage and conversion.
• Case in point: A German transformer manufacturer replaced their local 0.30mm supply with our 0.35mm CRGO Silicon Electrical Steel Coil and achieved the same efficiency rating while reducing material costs by 12%.

 

 

We provide full traceability for every 0.35mm CRGO Silicon Electrical Steel Coil.

 

 Mill Test Certificates (MTC)

Every shipment includes a certified MTC showing:

• Heat number and chemical analysis (Si%, C%, S%).
• Magnetic loss at 1.5T & 1.7T.
• Stacking factor test results.
• Coating adhesion rating (Class C or better).

 

 

Third-Party Inspection Welcome

We facilitate SGS, BV, or TÜV inspection at our warehouse before shipping. We also provide slitting services to cut the 0.35mm CRGO Silicon Electrical Steel Coil into custom widths (from 20mm to 1250mm) to suit your punch press line.

 

 

Don't let inefficient core materials hold back your transformer's performance. The 0.35mm CRGO Silicon Electrical Steel Coil thickness represents the gold standard for balancing magnetic efficiency and production economy. Whether you need a specific silicon content (2.9%-3.3%) or a precise mechanical tolerance, GNEE has the stock and the technical expertise to support your factory.

 

Ready to test our material?
👉 Click the "Send Inquiry" button now to request a free sample, get the latest mill price list for 0.35mm CRGO Silicon Electrical Steel Coil, or schedule a video call to inspect our warehouse. Let GNEE be your silent partner in building quieter, cooler, and more profitable transformers.

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Why is CrGO steel used in transformers?

CRGO has lower hysteresis and eddy current losses due to its aligned grain structure, resulting in higher efficiency. This makes CRGO the go-to material for energy-efficient transformers and power distribution systems.

 

Why is silicon steel used in transformers?

Silicon steel is used because it offers high magnetic permeability and low hysteresis loss, which reduces energy wastage during magnetization cycles. The addition of silicon (typically 3–4%) increases resistivity, minimizing eddy current losses and improving efficiency.

 

What is the thickness of CRGO M4 grade?

CRGO CUT LAMINATION CORE (GRADE - M4(0.27mm))

 

What are the different grades of CrGO steel?

CRGO (Cold Rolled Grain Oriented) steel is used in transformer cores, and it comes in grades like M2, M3, M4, M5, and M6. These grades refer to the thickness and the material's magnetic performance.

 

Can CRGO steel be used in electric motors?

Electric Motors: CRGO steel is also used in the manufacturing of electric motors. The material's magnetic properties play a vital role in enhancing the motor's efficiency and performance.

 

GRADE	Thickness(mm)	Iron Loss(W/kg)
23Q110	0.23	1.1
27Q120	0.27	1.2
27Q130	0.27	1.3
30Q120	0.3	1.2
30Q130	0.3	1.3
35Q135	0.35	1.35
35Q145	0.35	1.45
35Q155	0.35	1.55
23QG090	0.23	0.9
23QG095	0.23	0.95
23QG100	0.23	1
27QG095	0.27	0.95
27QG100	0.27	1
27QG120	0.27	1.2
30QG105	0.3	1.05
30QG120	0.3	1.2
23RK080	0.23	0.8
23RK085	0.23	0.85
23RK090	0.23	0.9
23RK095	0.23	0.95
27RK085	0.27	0.85
27RK090	0.27	0.9
27RK095	0.27	0.95
27RK100	0.27	1
27RK120	0.27	1.2
30RK100	0.3	1
30RK105	0.3	1.05
30RK120	0.3	1.2

35WW230	0.35	2.1
35WW250	0.35	2.3
35WW270	0.35	2.5
35WW300	0.35	2.7
35WW360	0.35	3.3
35WW400	0.35	3.6
35WW440	0.35	4
50WW270	0.5	2.5
50WW290	0.5	2.7
50WW310	0.5	2.9
50WW350	0.5	3.1
50WW400	0.5	3.5
50WW470	0.5	4
50WW700	0.5	4.3
50WW800	0.5	5
50WW1000	0.5	6
50WW1300	0.5	7
50WGB350	0.5	6
50WGB400	0.5	3.5
50WGB430	0.5	4
50WGB500	0.5	4.3
65W530	0.65	5
65W800	0.65	6.5
70WK340	0.7	3.4
70WK380	0.7	3.8
75WK400	0.75	4
80WK420	0.8	4.2
85WK450	0.85	4.5