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Non-Oriented Electrical Steel

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Non-oriented electrical steel

Non-oriented electrical steel (NOES) has high permeability, high magnetization saturation, low core loss and relatively low cost.

The magnetic properties of non-oriented electrical steels strongly depend on the silicon content, the cleanliness of the steel, the thickness of the steel sheet, and the grain size and texture of the final lamination.

Characteristics

Magnetic Properties

The magnetic properties of the product are featured by its low core loss, high permeability, and excellent application performance.

Thickness Tolerance

Good thickness tolerance is characterized by a small difference in thickness in a direction parallel to the direction of rolling, a small difference in thickness in a direction perpendicular to the direction of rolling, and a high lamination factor.

Processing Properties

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 environmental protection laws and regulations including EU RoHS and REACH regulations.

non-oriented electrical steel, non-oriented electrical steel coil

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

Coating codeT4H4KLZV
ComponentSemi-organicSemi-organicSemi-organicSemi-organicSemi-organic

Semi-

organic

Lamination factorHighHighHighHighHighHigh
Inter laminar resslstanceHighHighVery HighVery highvery highHigh
Attachmentvery goodvery goodgoodgoodvery goodgood
Corrosion resistancegoodgoodgoodgoodgoodgood
Heat-ressistance

Withstands stress-relief annealing

<780 ℃ under inert gas

Withstands stress-relief annealing

<750 ℃ under inert gas

Withstands stress-relief annealing

<600 ℃ under inert gas

Unsuitable for annealingUnsuitable for annealing

Withstands stress-relief annealing

<600 ℃ under inert gas

Punchabilityvery goodvery goodgoodgoodvery goodvery good
WeldabilityGoodGoodGood————Good

Note:

1. Unless otherwise specified, the surface coating for non-oriented electrical steel is designated as T4 coating.

2. The self-bonding surface coating is designated as Z coating. Following the procedures of stamping and stacking, the laminations with Z coating will be adhered to by themselves after the treatment of hot pressing to assure the overall strength of the iron core. The procedure of welding or riveting is not necessary. It must be emphasized that the electrical steel strip and sheet with self-bonding coating shall be used within six months after ex-works.

Recommended Applications

Varieties High grade Middle grade Low grade
Medium and small power transformer   
Voltage regulatorReactor and magnetic amplifier   
 Inductor   
TV&Radio transformer   
Welding transformer   
Large&medium-scalemotor  
Small&micro-scale motor 
 Sealed motor  
 Intermit motor    
Medium-frequency motor and driven motor     
Compressor motor 
Rectifier 
 Choke coil    
Relay and electromagnetic switch 

Product Designation

The steel grade comprises the following in the order given:

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

2) W: capital letter of Chinese pinyin “Wu”

3) Characteristic letter:

W: capital letter of Chinese Pinyin “Wu”;

TG: capital letter of Chinese Pinyin “Te Gao”;

GP: capital letter of Chinese Pinyin “Gao Ping”

H: high permeability non-oriented electrical steel

K: non-oriented electrical steel for magnetic switch

4) one hundred times the maximum value of specific total loss in watts per kilogram at 1.5 T and 50 Hz, unless otherwise specified

One hundred times the maximum value of the specific total loss

Classification of non-oriented electrical steel:

  • W for normal non-oriented electrical steel
  • TG for special high-frequency series non-oriented electrical steel
  • GP for medium and high-frequency series non-oriented electrical steel
  • H for high permeability series non-oriented electrical steel
  • K for magnetic switch series non-oriented electrical steel

W: Wuhan Iron & Steel Co., Ltd.

One hundred times the nominal thickness

Examples:

Non-oriented electrical steel with the maximum specific total loss of 4.0 W/kg at 1.5 T and 50 Hz and a nominal thickness of 0.50 mm shall be designated as 50WW400.

Special high frequency non-oriented electrical steel with the maximum specific total loss of 15.0 W/kg at 1.0 T and 400 Hz and a nominal thickness of 0.20 mm shall be designated as 20WTG1500.

Magnetic switch series non-oriented electrical steel with the maximum specific total loss of 3.4 W/kg at 1.0 T and 50 Hz and a nominal thickness of 0.70 mm shall be designated as 70WK340.

Surface Coating Designation

The surface coating is usually T4, and the grade with sufx such as “H4”, “K”, “L”, “V” and “Z” refers to special coating designation.

H4: chromium free semi organic coating

K: chromium free and water soluble thick coating, equivalent to C5 according to IEC 60404-1-1

L: chromium free and water soluble extreme thick coating, equivalent to C6 according to IEC 60404-1-1

V: chromium free and water soluble thin coating, equivalent to C4 according to IEC 60404-1-1

Z: chromium free, water soluble and self-bonding coating, equivalent to C3 according to IEC 60404-1-1

Examples:

Non-oriented electrical steel with the maximum specic total loss of 4.0

W/kg at 1.5 T and 50 Hz, a nominal thickness of 0.50 mm and H4 surface

coating shall be designated as 50WW400-H4.

Non-oriented electrical steel with the maximum specic total loss of 4.0

W/kg at 1.5 T and 50 Hz, a nominal thickness of 0.50 mm and C5 surface

coating shall be designated as 50WW400-K.

Non-oriented electrical steel with the maximum specic total loss of 4.0

W/kg at 1.5 T and 50 Hz, a nominal thickness of 0.50 mm and C6 surface

coating shall be designated as 50WW400-L.

Non-oriented electrical steel with the maximum specic total loss of 4.0

W/kg at 1.5 T and 50 Hz, a nominal thickness of 0.50 mm and C4 surface

coating shall be designated as 50WW400-V.

Non-oriented electrical steel with the maximum specic total loss of 4.0

W/kg g at 1.5 T and 50 Hz, a nominal thickness of 0.50 mm and C3

surface coating shall be designated as 50WW400-Z.

Specifications

Dimensions of Products

Available thicknessAvailable width rangeInside diameter
mmmmmm
0.15、0.20 950-1000508±10
0.30 0.35 0.50 0.70 0.75 0.80 0.851000-1250508±10

Dimensional and Shape Tolerances

Nominal thicknessNominal thickness toleranceTraverse thickness toleranceWidth toleranceFlatnessCamber within 2m
mmmmmmmm%mm
0.15±0.012≤0.0100~+1.5 ≤1.5≤1.0
0.2±0.012≤0.010
0.3±0.015≤0.012
0.35±0.015≤0.012
0.5±0.020≤0.015
0.7±0.030≤0.025
0.75±0.030≤0.025
0.8±0.040≤0.030
0.85±0.040≤0.030

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

b.Please consult us if you have special requirements.

Typical Mechanical Properties

GradeYield strength N/mm2Tensile strength N/mm2Elongation %HardnessLamination factor %
LCLCLC
35WW230415435520540161819598
35WW250415435520540161819598
35WW270415435520540161819598
35WW300395410510530252618598
35WW360380400490505272917098
35WW440270280415435303214098
50WW250420440520540161819598.5
50WW270420440520540161719598.5
50WW290420440520540161819598.5
50WW310390410510530252718598.5
50WW350390410510530252718598.5
50WW400380400490510273017098.5
50WW470265275420440303214098.5
50WW600280295410425404213098.5
50WW800255265380390454610598.5
50WW1300230240350360505010098.5
20WTG1500400415510525222117597
30WGP1600420430520530161819098
30WGP1700395405520530161819098
50WH470300315440452333415098.5
50WH600250265420435383913598.5

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—Vertical to the rolling direction.

Standard Magnetic Properties

GradeNominal thicknessTheoretical densityMax.Core lossMin.InductionMin.Number of bendsMin.Lamination factor
P1.5/5050HZ
B5000
mmkg/dm3w/kgT %
35WW2300.357.62.11.62396
35WW2507.62.31.623
35WW2707.62.51.623
35WW3007.652.71.626
35WW3607.653.31.636
35WW4407.741.656
50WW2500.57.62.31.62397
50WW2707.62.51.623
50WW2907.62.71.623
50WW3107.62.95303
50WW3507.653.11.626
50WW4007.653.51.646
50WW4707.73.31.710
50WW6007.754.21.671297.5
50WW8007.85.81.715
50WW13007.857.51.7415
50WH4700.57.731.71897
50WH6007.753.51.721097
GradeNominal thicknessTheoretical densityMax.Core lossMin. InductionMin. Number of bendsMin. Lamination factor
P1.0/40050HZ400HZ
B5000B2000
mmkg/dm3w/kgT %
20WTG15000.27.6515 1.493
30WGP16000.37.6161.62 395.5
30WGP17000.37.6171.62 595.5

Note:

           a. Testing standard is GB/T3655.

           b. Using as-sheared specimens one-half longitudinal and one-half transverse to the rolling direction.

Typical Magnetic Properties

GradeNominal thickness mmTheoretical density kg/dm3Core loss w/kgInduction T
50HZ60HZ
1.0T1.5T1.0T1.5T2500A/m5000A/m
35WW2300.357.60.852.061.082.611.571.67
35WW2507.60.922.21.162.741.581.67
35WW2707.612.331.252.921.581.67
35WW3007.6512.451.263.071.61.68
35WW3607.651.162.691.443.351.61.69
35WW4407.71.22.821.513.531.641.72
50WW2500.57.60.942.261.243.011.591.67
50WW2707.61.012.451.273.061.591.67
50WW2907.61.072.491.363.21.591.67
50WW3107.61.162.681.473.441.591.69
50WW3507.651.182.71.513.451.611.69
50WW4007.651.232.831.563.621.611.68
50WW4707.71.353.151.744.061.651.72
50WW6007.751.713.792.164.821.641.72
50WW8007.82.14.672.415.491.661.74
50WW13007.852.445.323.096.851.681.76
50WH4700.57.71.272.861.613.631.651.73
50WH6007.751.423.211.794.061.661.73
GradeNominal thickness mmTheoretical density kg/dm3Core loss w/kgInduction T
50HZ60HZ400HZ
1.0T1.5T1.0T1.5T1.0T

2500

A/m

5000

A/m

20WTG15000.27.651.062.51.293.0813.061.551.65
30WGP16000.37.60.862.121.072.6614.681.551.65
30WGP17000.37.60.852.121.072.6614.811.541.64
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