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Electrical Steel/Silicon Steel

Electrical steel usually refers to cold rolled electrical steel, divided into grain oriented electrical steel and grain non-oriented electrical steel two categories. Oriented electrical steel easily magnetized grain direction along the rolling direction distribution, rolling direction with high magnetic susceptibility, low iron loss and low magnetostriction and other excellent characteristics, but also through the refinement of the magnetic domain of the technical processing, to obtain lower iron loss, widely used in the transformer industry; non-oriented electrical steel grain direction random distribution, electromagnetic properties of all directions, widely used in the motor industry.

Classification :

Carbon Steel Coil

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PRODUCT DETAILS

Recommended Applications

Varieties	Conventional	High induction	Domain refined high induction
Large motors	★	★
Large transformers	★	★	★
Medium and small transformers	★	★	★
Distributing transformers	★	★
Voltage regulator	★	★
Reactor and magnetic amplifier	★	★	★
IF transformer		★
Mutual inductor	★	★
TV transformer	★	★
Radio transformer	★	★
Radio broadcast transformer		★

Product Designation

The steel grade comprises the following in the order given:

1)one hundred times the normal thickness of the material,in millimeters;

2)characteristic letter:

Q:capital letter of Chinese Pinyin"Qu";

G:capital letter of Chinese Pinyin"Gao";

RK:domain refined grades by laser scribing,to be deteriorated when subjected to heat treatment.

3)one hundred times the maximum value of specific total loss in watts per kilogram at 1.7 T and 50 Hz,unless otherwise specified.

Examples:

Conventional grain oriented electrical steel with the maximum specific total loss of 1.2W/kg at 1.7T and 50 Hz and a nominal thickness of 0.30 mm shall be designated as 30Q120.

High permeability grain oriented electrical steel with the maximum specific total loss of 1.2 W/kg at 1.7T and 50 Hz and a nominal thickness of 0.30 mm shall be designated as 30QG120.

High permeability grain oriented electrical steel,domain refined by laser scribing,with the maximum specific total loss of 0.90 W/kg at 1.7T and 50 Hz and a nominal thickness of 0.27mm shall be designated as 27RK090.

Specifications

Standard Dimensions of Products

Available thickness	Available width range	Inside diameter
mm	mm	mm
0.18、0.20	850-1200	508±10
0.23、0.27、0.30、0.35	850-1200	508±10

Dimensional and Shape Tolerances

Nominal thickness	Nominal thickness tolerance	Longitudinal thickness tolerance	Traverse thickness tolerance	Width tolerance	Flatness	Camber within 2m
mm	mm	mm	mm	mm	%	mm
0.18	±0.015	≤0.020	≤0.010	0~+1	≤1.5	≤0.9
0.20	±0.015	≤0.020	≤0.010
0.23	±0.020	≤0.025	≤0.015
0.27	±0.025
0.30	±0.025
0.35	±0.025

Note:a.Traverse thickness deviation refers to the thickness difference between the sheet center and 15mm from the edge.

b.The longitudinal thickness difference is the difference of the measured maximum

thickness and the minimum hickness in the longitudinal direction(parallel to the rolling direction)at an arbitrary 2m length of steel on steel.

c.Please consult us if you have special requirements.

Typical Mechanical Properties

Type	Nominal thickness mm	Tensile strength N/mm²		Elongation %	HV5 Hardness	Number of bends	Lamination factor %
Type	Nominal thickness mm	L	C	L	HV5 Hardness	Number of bends	Lamination factor %
Convertional	0.23	347	422	6	177	25	97.2
	0.27	352	427	8	180	25	97.5
	0.30	349	424	10	180	22	98.0
	0.35	364	435	9	180	22	98.5
High induction	0.18	375	445	8	177	25	96.5
	0.20	374	445	8	177	25	97.0
	0.23	347	422	6	177	25	97.2
	0.27	357	441	10	178	20	97.5
	0.30	347	431	8	179	15	98.0
Domamin refined high induction	0.18	368	417	13	177	22	96.5
	0.20	367	433	13	177	22	97.0
	0.23	342	417	6	177	20	97.2
	0.27	352	426	8	176	17	97.5
	0.30	336	408	9	177	19	98.0

Note:a.Testing standards are GB/T228、GB/T 4340.1、GB/T2522.

b.Above properties are typical values for reference only and not as a guarantee.

c.L—Parallel to the rolling direction.C—perpendicular to the rolling direction.

Standard Magnetic Properties

Type	Grade	Nominal thickness	Theoretical density	P1.7/50 Max.Core loss	B800 Min.Induction	Min.Lamination factor
Type	Grade	mm	kg/dm³	W/kg	T	%
Convertional	23Q110	0.23	7.65	1.10	1.82	94.5
	23Q120	0.23	7.65	1.20	1.82	95.0
	27Q120	0.27	7.65	1.20	1.82	95.5
	27Q130	0.27	7.65	1.30	1.82	96.0
	30Q120	0.30	7.65	1.20	1.82	96.0
	30Q130	0.30	7.65	1.30	1.82	96.0
	35Q135	0.35	7.65	1.35	1.82	96.5
	35Q145	0.35	7.65	1.45	1.82	96.5
	35Q155	0.35	7.65	1.55	1.82	96.5
High nduction	18QG085	0.18	7.65	0.85	1.86	92.0
	18QG095	0.18	7.65	0.95	1.86	92.0
	20QG085	0.20	7.65	0.85	1.86	93.0
	20QG095	0.20	7.65	0.95	1.86	93.0
	23QG085	0.23	7.65	0.85	1.88	94.5
	23QG090	0.23	7.65	0.90	1.88	94.5
	23QG095	0.23	7.65	0.95	1.88	94.5
	23QG100	0.23	7.65	1.00	1.88	94.5
	27QG095	0.27	7.65	0.95	1.89	95.0
	27QG100	0.27	7.65	1.00	1.89	95.0
	27QG120	0.27	7.65	1.20	1.89	95.0
	30QG100	0.30	7.65	1.00	1.89	95.5
	30QG105	0.30	7.65	1.05	1.89	95.5
	30QG120	0.30	7.65	1.20	1.89	95.5
Domamin refined hgh induction	18RK070	0.18	7.65	0.70	1.86	92.0
	18RK075	0.18	7.65	0.75	1.86	92.0
	18RK085	0.18	7.65	0.85	1.86	92.0
	20RK070	0.20	7.65	0.70	1.86	93.0
	20RK075	0.20	7.65	0.75	1.86	93.0
	20RK085	0.20	7.65	0.85	1.86	93.0
	23RK075	0.23	7.65	0.75	1.88	94.5
	23RK080	0.23	7.65	0.80	1.88	94.5
	23RK085	0.23	7.65	0.85	1.88	94.5
	23RK090	0.23	7.65	0.90	1.88	94.5
	23RK100	0.23	7.65	1.00	1.88	94.5
	27RK085	0.27	7.65	0.85	1.89	95.0
	27RK090	0.27	7.65	0.90	1.89	95.0
	27RK095	0.27	7.65	0.95	1.89	95.0
	27RK100	0.27	7.65	1.00	1.89	95.0
	27RK120	0.27	7.65	1.20	1.89	95.0
	30RK095	0.30	7.65	0.95	1.89	95.5
	30RK100	0.30	7.65	1.00	1.89	95.5
	30RK105	0.30	7.65	1.05	1.89	95.5
	30RK120	0.30	7.65	1.20	1.89	95.5

Note:a.Testing standards are GB/T3655(Q type and QG type)、GB/T13789(RKtype).

b.Q type and QG type test specimens are sheared to the rolling direction and annealed for stress relieving.

Typical Magnetic Properties

Grade	Nominal thickness mm	Theoretical density kg/dm³	Core loss W/kg				Induction
			50Hz		60Hz		Induction
			1.5T	1.7T	1.5T	1.7T	800A/m	2500A/m
23Q110	0.23	7.65	0.74	1.08	0.96	1.39	1.87	1.93
23Q120	0.23	7.65	0.77	1.17	1.00	1.50	1.84	1.91
27Q120	0.27	7.65	0.81	1.12	1.06	1.46	1.86	1.92
27Q130	0.27	7.65	0.84	1.20	1.10	1.55	1.85	1.92
30Q120	0.30	7.65	0.82	1.13	1.08	1.47	1.88	1.94
30Q130	0.30	7.65	0.88	1.20	1.15	1.56	1.87	1.93
35Q135	0.35	7.65	0.94	1.29	1.25	1.69	1.88	1.94
35Q145	0.35	7.65	1.02	1.35	1.36	1.78	1.87	1.93
35Q155	0.35	7.65	1.08	1.45	1.44	1.91	1.86	1.92
18QG085	0.18	7.65	0.61	0.83	0.79	1.08	1.90	1.94
18QG095	0.18	7.65	0.64	0.93	0.83	1.20	1.89	1.93
20QG0850	0.20	7.65	0.62	0.84	0.81	1.09	1.90	1.94
20QG0950	0.20	7.65	0.65	0.93	0.85	1.20	1.89	1.94
23QG0850	0.23	7.65	0.63	0.84	0.81	1.08	1.92	1.95
23QG090	0.23	7.65	0.64	0.88	0.85	1.15	1.91	1.95
23QG095	0.23	7.65	0.67	0.93	0.88	1.21	1.91	1.95
23QG100	0.23	7.65	0.71	0.98	0.93	1.28	1.90	1.95
27QG095	0.27	7.65	0.69	0.93	0.91	1.22	1.92	1.96
27QG100	0.27	7.65	0.72	0.98	0.95	1.28	1.91	1.96
27QG120	0.27	7.65	0.76	1.04	1.00	1.36	1.90	1.94
30QG100	0.30	7.65	0.74	0.98	0.99	1.29	1.93	1.96
30QG105	0.30	7.65	0.76	1.02	1.02	1.34	1.92	1.96
30QG120	0.30	7.65	0.81	1.10	1.07	1.44	1.91	1.95
18RK070	0.18	7.65	0.50	0.68	0.64	0.88	1.91	1.95
18RK075	0.18	7.65	0.51	0.72	0.67	0.93	1.90	1.94
18RK085	0.18	7.65	0.56	0.83	0.73	1.06	1.89	1.95
20RK070	0.20	7.65	0.50	0.68	0.66	0.88	1.92	1.96
20RK075	0.20	7.65	0.52	0.74	0.68	0.95	1.90	1.95
20RK085	0.20	7.65	0.57	0.84	0.74	1.08	1.89	1.94
23RK075	0.23	7.65	0.56	0.74	0.74	0.98	1.92	1.96
23RK080	0.23	7.65	0.58	0.78	0.76	1.03	1.92	1.96
23RK085	0.23	7.65	0.60	0.83	0.80	1.09	1.91	1.96
23RK090	0.23	7.65	0.62	0.88	0.82	1.13	1.90	1.96
23RK100	0.23	7.65	0.69	0.97	0.90	1.25	1.90	1.95
27RK085	0.27	7.65	0.62	0.83	0.82	1.09	1.92	1.95
27RK090	0.27	7.65	0.65	0.88	0.87	1.16	1.92	1.96
27RK095	0.27	7.65	0.67	0.93	0.89	1.22	1.91	1.96
27RK100	0.27	7.65	0.71	0.98	0.94	1.29	1.90	1.95
27RK120	0.27	7.65	0.77	1.10	1.02	1.43	1.89	1.95
30RK095	0.30	7.65	0.70	0.94	0.94	1.24	1.93	1.96
30RK100	0.30	7.65	0.72	0.97	0.96	1.29	1.92	1.96
30RK105	0.30	7.65	0.74	1.00	0.98	1.31	1.91	1.96
30RK120	0.30	7.65	0.80	1.08	1.06	1.41	1.90	1.95

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CUSTOMERS VISITING

FAQ

What's the first and the most important thing for a buyer to know before purchasing steel products from China?

99% of the buyers don't know how difficult( or we can say it's almost impossible) to deal with the steel mills directly, because all steel mills always give priority to selling their products to long-term agents, these agents can buy 99% of the mill's whole capacity of every month. So the steel mill never care one inquiry of 50tons, or 500 tons, or even 5000tons from the oversea market.

But sometimes, why all the buyers believe they are talking with the steel mill directly?

That's because some trading companies in China, who registered a very similar company name with someone steel mill. And normally these trading companies say they are the steel mills / manufacturers, no matter you need carbon steel, or stainless steel, or other alloys, they will always say: "yes, we can produce". But everyone knows, no one steel mill can produce all the different kinds of steel/metal actually.

What's the biggest challenge to do steel business in China?

Avoiding to be defrauded.

How can avoid a fraud?

There are 4 ways as below maybe can help you.
(1) Checking the supplier's basic information in Chinese Language. Very basic point, every Chinese company has company name/address/business license certificate in Chinese Language,if some companies can not show this information in Chinese, then you must be careful, maybe they are the companies registered oversea, like Marshall Islands/ Cayman Islands,you even don't know who they are actually and where they are.
(2) Checking the supplier's Bank account details. We all know that no matter Chinese companies or foreign companies, normally we open our bank account in the same city with our office. If one company send their bank account in another different city to their office, or even in Hong Kong or Singapore,then you must be careful, many clients were cheated after they transfer the money to these kind of bank accounts.
(3) Never be attracted by the super low price. As we know, steel products are bulk commodities, the cost prices in China are very transparent. A normal company's quotation is unlikely to be more than 10% cheaper or higher than that of other companies because the steel cost is fixed. If you receive a very cheaper price, then you must be careful, the super low prices are normally FAKE prices.
(4) Checking the payment term. The cheaters companies always request 10%-30% deposit of the total order amount, but they never care about the balance, they can agree any payment term for the balance based on deposit. But they don't accept LC, which is the most fair payment term for both of the seller and buyer. Many clients were cheated after paying the deposit, the supplier don't reply email or answer the call any more, or they request to increase prices at least 30% or even 50%.

Carbon Steel Coil