Cold Rolled Grain Oriented Silicon Steel CRGO, High Magnetic Permeability Low Core Loss Electrical Steel Coil for Power Transformer Core

Product Description

Product Description

Silicon steel material
Silicon steel, also known as electrical steel, is a ferrosilicon alloy steel with a high silicon content. Its silicon content is usually between 1.0% and 4.5%. The silicon content of some high silicon steel sheets can reach 6.5%, and the carbon content is less than 0.08%. The material characteristics of silicon steel give it excellent properties such as high magnetic permeability, low coercivity, and large resistivity, so the hysteresis loss and eddy current loss are relatively small. In addition, in order to improve the magnetic induction performance and reduce the hysteresis loss, the harmful impurity content of silicon steel must be as low as possible, and its plate shape must be flat and the surface quality must be good.

Silicon steel can be divided into three categories according to manufacturing process and use: hot-rolled silicon steel, cold-rolled electrical steel, and special-purpose silicon steel. Among them, cold-rolled electrical steel can be divided into cold-rolled non-oriented electrical steel and cold-rolled oriented electrical steel, the latter of which has higher magnetism along the rolling direction.

 Silicon steel grades:

The standard grades of Chinese silicon steel mainly follow the GBT2521-2016 standard. Common non-oriented silicon steel grades include 35W230, 35W250, 35W270, 35W300, 35W360, 50W290, 50W310, 50W350, etc. The "W" in these grades represents non-oriented silicon steel, and the numbers are related to the performance parameters of silicon steel such as magnetic flux density.

Representation method of silicon steel grades

The representation method of silicon steel grades usually includes the following parts:

Type identification: such as "DW", "DQ", etc., used to distinguish the types of silicon steel, such as cold-rolled non-oriented silicon steel, cold-rolled oriented silicon steel, etc.

Iron loss value: indicates the iron loss value per unit weight of silicon steel at a specific frequency and magnetic induction peak value, usually expressed as 100 times of this value.

Thickness value: indicates the nominal thickness of silicon steel, also usually expressed as 100 times of this value.
For example, "DW470-50" means cold-rolled non-oriented silicon steel with an iron loss value of 4.7w/kg and a thickness of 0.5mm. The new model is now represented by 50W470.

Product Parameters

Magnetic properties	The magnetic properties of the product is featured by its low core loss, high permeability and excellent application performance.
Thickness tolerance	The good thickness tolerance is characterized by small difference in thickness in a direction parallel to the direction of rolling, small difference in thickness in a direction perpendicular to the direction of rolling, and high lamination factor.
Processing property	The product is suitable for punching and cutting with excellent dimensional tolerance.
Insulation coating	The  insulation coating  has small color deviation, good adhesiveness and excellent  resistance to  heating  and  corrosion with  high  insulation  coating resistance. There are several types of insulation coating available for production. According  to  the  test  results  performed  by  the  professional  inspection organizations,  the  contents  of  hazardous  substances  comply  with  all  the prevailing  international  and  domestic  environment  protection  laws  and regulations including EU RoHS and REACH regulations.

 Different insulation coatings are available to meet a range of customer requirements according to interlaminar resistance, corrosion resistance, punchability, weldability and so on.

Coating code	T2	H	W
Component	Inorganic	Inorganic(not including Cr)	No-glass-flm product
Lamination factor	High	High
Interlaminar resistance	High	High	Very Low
Attachment	Good	Good
Corrosion resistance	Very Good	Very Good
Heat-resistance	Withstands stress-relief annealing <820ºC under inert gas	Withstands stress-relief annealing <820ºC under inert gas
Punchability	Good	Good	For the production of extremely thin material

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		★

 

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

 

Product Application

Uses of silicon steel
Due to its unique physical and magnetic properties, silicon steel is widely used in many fields:

Electric power industry: Silicon steel is an indispensable magnetic material in the electric power industry, mainly used to manufacture the core parts of motors, transformers and electrical equipment. For example, large and medium-sized motors, generators and transformers are usually made of cold-rolled oriented silicon steel to improve their magnetic properties and efficiency.

Household appliances: Silicon steel is also widely used in household appliances, such as washing machines, range hoods, air conditioning compressors and other motors. Silicon steel is often used as the core material. With the improvement of the performance of household appliances and the improvement of energy-saving and environmental protection requirements, higher requirements are also put forward for the performance and quality of silicon steel.

Military and electronic industries: Silicon steel is also an important soft magnetic material in the military and electronic industries, used to manufacture high-frequency transformers, high-power magnetic amplifiers, pulse generators and other high-precision and high-demand electronic equipment.
Other fields: In addition, silicon steel is also used to manufacture electrical instruments, magnetic shielding devices, etc. Silicon steel also plays an important role in equipment such as transformers working under vibration and radiation conditions.

Packaging & Shipping

 

Company Profile

Jinan Zunkai Group founded in 2002, with five branch companies and is well-funded. Our annual sales nearly one billion, about 300,000 tons steel.

Our company is located in Jinan City, Shandong Province. We entered into a strategic partnership with Bao Steel, Laiwu Steel, Rizhao Steel, Handan Steel, Anyang Steel, Maanshan Steel and other domestic large steel companies.

Zunkai is the largest steel agent in Shandong Province, we also have ourselves steel process factory with 100000 Square meter for steel laser cutting, surface treatment and other further processing , and our stock always more than 20,000 tons.

Zunkai Group mainly engaged in : PPGI ,galvanized steel , steel plate , round bar, steel pipe ,Stainless steel product ,angle bar, steel pile ,H beam ,I beam, angle, Channel flat steel etc .

Our good quality and reliable service will be your best trusted partner.

Sincerely wish to building long and regular business with you forever!!!

Our Service

1. Immediate Respond.
All the customers have Zunkai Group full attention, we will be 24/7 on line at your services to provide the immediate and professional suggestion. Zunkai Group  has exported to more than 30 countries in the world.
We could provide you the immediate respond services with our sincerity.


2.Professional Suggestion.
With decade commitment, more than 90% technician has incepted the mechanical bachelor degree in Zunkai team, and almost 60% has more than 6 years' steel manufacturing and consulting experiences.
We could provide you the professional suggestion with our sincerity.


3.Strict QA/QC Procedure.
Zunkai Group as the bankable manufacturer, always cherish the quality as the lifetime.
We abide by the strict quality control(QC)ans quality Assurance(QA) procedure.


4.Warranty issued.
In order to assure the customers, Zunkai Group covered the national property insurance.
We are also sanctioned by all the different testing center which is mandatory, including ISO9001, ECOCERT, OMRI list etc.