Low-Loss, High-Permeability Non-Grain Oriented (CRNGO) Silicon Steel

You are here: Home / Products / Crngo Silicon Steel

CRNGO Core Strengths

Energy Efficiency:
Optimized magnetic domain refinement significantly decreases eddy current loss, yielding up to 15% improvement in motor conversion efficiency.

Magnetic Saturation:
A B50 value >1.7T enables high flux density operation, supporting compact, high power density motor topologies.

Processability:
Surface insulation layer maintains thermal stability at 850 °C. Punching burr height ≤0.03 mm minimizes mechanical stress concentration and reduces tool degradation.

Dimensional Consistency:
Production under ISO 9001/14001 standards achieves thickness uniformity with ≤0.5% variation along the full coil length.

Operational Economy:
Reduced specific core loss contributes to a 5–8% decrease in total motor lifecycle energy consumption (per IEC 60404 evaluation).

Environmental Compliance:
ROHS-conforming C6 insulation coating combined with recyclable substrate material aligns with sustainable manufacturing requirements.

CRNGO Silicon Steel Parameter Table & Technical Specifications

The above parameters reflect our standard motor-grade and generator-grade non-oriented silicon steel (CRNGO) coils and strips. Custom specifications are available upon request.

Item No.	Description of goods	Grade	Thickness (MM)	Guaranteed value	Magnetic polarization (T) B50
Item No.	Description of goods	Grade	Thickness (MM)	Max Iron loss at P1.5/50 W/KG	Magnetic polarization (T) B50
1	(CRNGO) Primary Cold Rolled Grain Non Oriented Silicon Steel Mother Coil	50W1300	0.50	13.00	1.70
2		50W800	0.50	8.00	1.70
3		50W600	0.50	6.00	1.70
4		50W470	0.50	4.70	1.70
5		50W310	0.50	3.10	1.70
6		50W290	0.50	2.90	1.70
7		35W440	0.35	4.40	1.70
8		35W300	0.35	3.00	1.70
9		35W270	0.35	2.70	1.70
10		35W250	0.35	2.50	1.70
11		20W1300	0.20	13.00	1.70
Density: 7.60~7.85 Building Factor ＞96% Note: Comprehensive parameters according to IEC/GB/ASTM standards

Chemical Composition of CRNGO Non-Grain Oriented Silicon Steel

Silicon(Si)	Carbon(C)	Manganese(Mn)	Sulphur(S)	Phosphorus(P)	Aluminium(Al)	Chromium(Cr)	Nickel(Ni)	Cuprum(Cu)
2%~ 3.5%	Max. 0.01%	Max. 0.5%	Max. 0.02%	Max. 0.03%	Max. 0.005%	Max. 0.2%	Max. 0.01%	Max. 0.4%

CRNGO Silicon Steel Coil Weight Specifications

Our CRNGO silicon steel coils are typically supplied in the 2.0–4.5 ton range, ideal for motor-grade and generator-grade non-grain oriented electrical steel manufacturing. To support different equipment setups and logistics needs, we also offer custom coil weight options, enabling flexible coil-to-strip processing and stable high-volume production.

Dimensions & Coil Geometry of CRNGO Silicon Steel

Coil Inner Diameter: 508±12 mm

Standardized for international processing lines, the 508 mm inner diameter of our CRNGO electrical steel coils ensures optimal compatibility with slitting, stamping, and lamination-forming machines. The tight tolerance supports efficient production of low-loss, high-permeability non-grain oriented silicon steel components.

Size and Shape Tolerances of CRNGO Silicon Steel

(Unit: mm)

Value	Thickness Tolerance	Longitudinal Thickness Tolerance	Transverse Thickness Tolerance	Flatness	Camber within 2m
Guaranteed	±0.030	≤ 0.030	≤ 0.020	<1.5%	<1.0mm
Typical	±0.010	0.02	0.01	<1.5%	<1.0mm

Mechanical Properties of CRNGO Silicon Steel

Grade	Yield strength N/mm²		Tensile strength N/mm²		Elongation %		HV5 Hardness
Grade	L	C	L	C	L	C	HV5 Hardness
35W250	415	435	520	540	16	18	195
35W270	415	435	520	540	16	18	195
35W300	395	410	510	530	25	26	185
35W440	270	280	415	435	30	32	140
50W290	420	440	520	540	16	18	195
50W310	390	410	510	530	25	27	185
50W470	265	275	420	440	30	32	140
50W600	280	295	410	425	40	42	130
50W800	255	265	380	390	45	46	105
50W1300	230	240	350	360	50	50	100
20W1300	400	415	510	525	22	21	75
Notes: Above is average value that can be achieved currently. L represents the test piece shall be taken longitudinal to the rolling direction. C represents the test piece shall be taken transverse to the rolling direction. The above values are typical values , only for reference and not guaranteed.

Surface Coating Specifications for CRNGO Non-Oriented Electrical Steel

C3 Standard Insulation Coating	C5 High Insulation Coating	C6 Organic Insulation Coating	Uncoated Option
A versatile coating designed for general applications. • Surface resistivity: 5–15 Ω·cm² • Thermal stability: up to 750°C	Optimized for high-frequency and high-efficiency uses. • Surface resistivity: 20–50 Ω·cm² • Thermal stability: up to 800°C	Offers excellent punchability and weldability. • Surface resistivity: 10–30 Ω·cm² • Thermal stability: up to 850°C	Provided for specific needs or customized coating solutions. • Surface finish: Pickled and oiled • Tailored coating choices available

Physical Properties of CRNGO Silicon Steel

Electrical Resistivity	Curie Temperature	Thermal Conductivity
0.40-0.60 μΩ·m	740-770°C	18-25 W/(m·K)

Application Scenarios

Electric Motors

Electric Motors

Non-oriented electrical steel is widely used in motor cores. With nearly isotropic magnetic properties, it reduces core losses and improves motor efficiency. It is commonly applied in industrial motors, household motors, and drive motors for electric vehicles.
Generators

Generators

Non-oriented electrical steel is suitable for generator stator and rotor cores. It effectively reduces energy losses, enhances generation efficiency, and ensures stable operation. It is a key material in thermal power, hydropower, and wind power generation equipment.
Home Appliances

Home Appliances

In refrigerators, air conditioners, and washing machines, non-oriented electrical steel offers excellent magnetic and punching performance. It significantly reduces energy consumption, enabling home appliances to achieve higher efficiency, energy savings, and longer service life.
New Energy Vehicles

New Energy Vehicles

Non-oriented electrical steel is used in drive motors for new energy vehicles. With high strength and low loss, it ensures efficiency and stable performance under high-speed operation, supporting the rapid development of green and sustainable transportation.