Prime quality CRGO transformer Electrical steel

Sep 29, 2025

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CRGO transformer Electrical steel Product Description

CRGO is usually supplied by the producing mills in coil form and has to be cut into "laminations", which are then used to form a transformer core, which is an integral part of any transformer. Grain-oriented steel is used in large power and distribution transformers and in certain audio output transformers.

CRNGO is less expensive than CRGO. It is used when cost is more important than efficiency and for applications where the direction of magnetic flux is not constant, as in electric motors and generators with moving parts. It can be used when there is insufficient space to orient components to take advantage of the directional properties of grain-oriented electrical steel.

Properties of CRGO Steel

It is a soft magnetic material and has the following properties:

High magnetic permeability.
Reduced magnetostriction.
High resistivity.
High stacking or laminating factor allows compact core designs.
Low losses.

Grades of CRGO Steel

The early grades of steel were known as M7(0.7watts /lb at 1.5T/60Hz) and M6(.6watts/lb at 1.5T/60Hz).
Similarly, M5 M4 and M3 grades were developed in the late sixties.
A new material called Hi-B has a remarkable degree of orientation and is 2 – 3 grade better than conventional CRGO steel products.

specification of Electrical Silicon Steel

Item	GO Electrical steel
Available thickness(mm)	0.23 0.27 0.30 0.35
Available Width (mm)	800~1200 or customized
Inside Diameter(mm)	508
Weight	2~5T

Note: Coil weight can be customized

Dimensional and shape tolerances (For reference)

Available thickness

(mm)

Thickness tolerance

(mm)

Transverse thickness tolerance

(mm)

Longitudinal thickness tolerance

(mm)

Width tolerance

(mm)

Flatness

(%)

Camber 2m

(mm)

0.23

±0.020

≤0.020

≤0.030

0~+2

≤1.5

≤1.0

0.27

±0.030

0.30

0.35

Technical indexes of GO Electrical steel (For reference)

Electromagnetic property standard

Type	Available thickness (mm)	Grade	Density (kg/dm³)	Max core loss (W/kg)	Min. Magnetic induction (T)
Common type	0.23	23SQ110	7.65	1.10	1.80
	0.27	27SQ110	7.65	1.10	1.82
	0.27	27SQ120	7.65	1.20	1.8
	0.30	30SQ120	7.65	1.20	1.82
	0.30	30SQ130	7.65	1.30	1.81
	0.35	35SQ135	7.65	1.35	1.80
		35SQ145	7.65	1.45	1.80
		35SQ155	7.65	1.55	1.80
High magnetic induction type	0.23	22SQG085	7.65	0.85	1.87
		23SQG090	7.65	0.90	1.87
		23SQG095	7.65	0.95	1.87
	0.27	27SQG090	7.65	0.90	1.89
		27SQG95	7.65	0.95	1.89
		27SQG100	7.65	1.00	1.89
	0.30	30SQG100	7.65	1.00	1.89
		30SQG105	7.65	1.05	1.89
		30SQG110	7.65	1.10	1.89
		30SQG120	7.65	1.20	1.89
	0.35	35SQG115	7.65	1.15	1.89
		35SQG125	7.65	1.25	1.89
		35SQG135	7.65	1.35	1.89
Domain refined high magnetic induction type	0.23	23SQGD080	7.65	0.80	1.89
		23SQGD085	7.65	0.85	1.89
		23SQGD090	7.65	0.90	1.89
	0.27	27SQGD085	7.65	0.85	1.89
		27SQGD090	7.65	0.90	1.89
		27SQGD095	7.65	0.95	1.89
	0.30	30SQGD095	7.65	0.95	1.89
		30SQGD100	7.65	1.00	1.89
		30SQGD105	7.65	1.05	1.89

Magnetic Properties( For reference)

Typical Electromagnetic Property

Type	Available thickness(mm)	Grade	Density (kg/dm³)	Max core loss(W.kg)				Induction(T)
Type	Available thickness(mm)	Grade	Density (kg/dm³)	P15/50	P17/50	P15/60	P17/60	B8	B25
Common type	0.23	23SQ110	7.65	0.76	1.05	1.03	1.40	1.89	1.95
	0.27	27SQ110	7.65	0..75	1.06	1.04	1.38	1.89	1.94
	0.27	27SQ120	7.65	0.81	1.10	1.07	1.46	1.89	1.94
	0.30	30SQ120	7.65	0.80	1.12	1.08	1.45	1.89	1.94
	0.30	30SQ130	7.65	0.83	1.16	1.12	1.54	1.88	1.94
	0.35	35SQ135	7.65	0.87	1.22	1.18	1.63	1.87	1.91
		35SQ145	7.65	0.93	1.30	1.25	1.72	1.85	1.91
		35SQ155	7.65	1.00	1.40	1.35	1.85	1.85	1.91
High magnetic induction type	0.23	22SQG085	7.65	0.62	0.83	0.80	1.09	1.91	1.95
		23SQG090	7.65	0.64	0.87	0.84	1.13	1.91	1.95
		23SQG095	7.65	0.65	0.90	0.87	1.17	1.91	1.95
	0.27	27SQG090	7.65	0.64	0.88	0.86	1.16	1.91	1.96
		27SQG95	7.65	0.67	0.92	0.89	1.21	1.91	1.95
		27SQG100	7.65	0.69	0.95	0.92	1.25	1.90	1.95
	0.30	30SQG100	7.65	0.71	0.97	0.93	1.28	1.91	1.96
		30SQG105	7.65	0.73	1.00	0.96	1.30	1.91	1.95
		30SQG110	7.65	0.74	1.0	0.97	1.32	1.91	1.95
		30SQG120	7.65	0.75	1.04	0.99	1.34	1.91	1.95
	0.35	35SQG115	7.65	0.83	1.11	1.09	1.50	1.90	1.95
		35SQG125	7.65	0.89	1.22	1.18	1.60	1.90	1.94
		35SQG135	7.65	0.96	1.32	1.27	1.72	1.90	1.94
Domain refined high magnetic induction type	0.23	23SQGD080	7.65	0.57	0.78	0.75	1.01	1.90	1.95
		23SQGD085	7.65	0.60	0.82	0.79	1.07	1.90	1.95
		23SQGD090	7.65	0.63	0.86	0.83	1.12	1.89	1.94
	0.27	27SQGD085	7.65	0.61	0.83	0.81	1.13	1.90	1.95
		27SQGD090	7.65	0..63	0.86	0.83	1.15	1.89	1.95
		27SQGD095	7.65	0.66	0.90	0.87	1.18	1.89	1.94
	0.30	30SQGD095	7.65	0.68	0.91	0.88	1.18	1.91	1.94
		30SQGD100	7.65	0.70	0.95	0.92	1.26	1.91	1.94
		30SQGD105	7.65	0.71	0.97	0.94	1.28	1.90	1.94

Insulating coating

Item	Characteristic
Composing Component	Inorganic coating
Interlamination resistance	High interlamination resistance and excellent insulation
Adhesion	Fine adhesion,close combination of coating and substrate,unease to peel.
Lamination factor	uniform coating and high lamination factor make goof lamination effect.
Processability	Excellent stamping and welding ability
Heat resistance	The coating can withstand 800℃ stress relieving annealing in non-oxidation environment
Corrosion resistance	The coating can immune form the corrosion of insulating coil,mechanical oil, cooling coil,anti freezing oil and Freon.

Typical Mechanical Properties(For reference)

Available thickness (mm)	Hardness (HV1)	Tensile strength (MPa)	Yield strength (MPa)	Elongation (%)	Number of bends	Lamination factor (%)	Adhesion (grade)
0.23	198	350	330	12	21	96.5	B-C
0.27	200	355	332	12	21	97.0	B-C
0.30	204	359	334	13	21	97.0	B-C
0.35	204	362	342	13	21	97.5	B-C

Cross reference of Designation (For reference)

Working closely with leading steel mills, we provide prime and reliable quality grain oriented silicon steel which meets the international standards.

Type	Thickness (mm)	Shousteel	Baosteel	NSC	JFE	TKS	Posco	NI&SCO	AK
Common type	0.23	23SQ110	B23G110			C110-23
	0.27	27SQ10	B27G120	27Z120	7JG120	C120-27	27PG120	NV27S-120	M-4
				27Z130	27JG130	C130-27	27PG130	NV27S-130	M-4
						C140-27	27PD140	NV27S-140
	0.30	30SQ120	B30G120	30Z120	30JG120		30PG120	NV30S-120
		30SQ130	B30G130	30Z130	30JG130	C130-30	30PG130	NV30S-130
		30SQ140	B30G140	30Z140	30JG140	C140-30	30PG140	NV30S-140	M-5
						C150-30
High magnetic induction type	0.27	27SQG090	B27P090	27ZH090			27PH095
		27SQG095	B27P095	27ZH095		H095-27	27PH095
		27SQG100	B27P100	27ZH100	27JGH100	H103-27	27PH100	NV27P-100
				27ZH110	27JGH110				H-1

	0.30	30SQG100	B30P100	30ZH100	30JGH100	H105-30	30PH100
		30SQG105	B30P105	30ZH105	30JGH105	H111-30	30PH105	NV30P-105
				30ZH110	30JGH110
		30SQG120	B30P120	30ZH120
Domain refined high magnetic induction type	0.23	23SQGD080	B23R080	23ZDKH80			23PHD080
		23SQGD085	B23R085	23ZDKH85			23PHD085
		23SQGD090	B23R090	23ZDKH90
	0.27	27SQGD085
		27SQGD090	B27R090	27ZDKH90 27ZDMH90	27JGSD	H090-27	27PHD090
		27SQGD095	B27R095	27ZDKH95 27ZDMH95	27JGSD95		27PHD095		H-1DR
	0.30	30SQGD095
		30SQGD100
		30SQGD105

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Manufacturing Process

1. Raw Material Sourcing

2. Slitting

3. Punching

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5. Core Forming

6. testing

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Founded in 2008 and located in Anyang in China, Gnee Electric is a high-tech enterprise specializing in researching and manufacturing iron core products.
The company currently occupies over 20,000 square meters and employs more than 200 people, including over 80 professionals. After more than 18 years of development, we have built our own magnetic material production base and independently develope, produce, and sell various kinds of iron cores. The common types include silicon steel cores, motor cores, transformer cores, toroidal iron cores, special-shaped cores, custom cores, and others. Our cores are widely applied in different sectors including transformers, motors, mutual inductors, voltage stabilizers, welding machines, magnetic amplifiers, and instrumentation, providing diverse core solutions to global customers.

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GNEE EC was founded in 2008, which is a National High-tech Enterprise & Famous Brand Enterprise in China, developing into a professional manufacturer and supplier of high-quality iron cores.

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