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Electrical steel, also called lamination steel, silicon electrical steel, silicon steel or transformer steel, is specialty steel tailored to produce certain magnetic properties, such as a small hysteresis area (small energy dissipation per cycle, or low core loss) and high permeability.
Electrical steel is usually coated to increase electrical resistance between laminations, to provide resistance to corrosion or rust, and to act as a lubricant during die cutting.
It is common material used in transformer and motor core.
Measurement parameters related to Electric Steel includes:
“Electric Current” |
amphere |
“Voltage” |
volt |
“Electric Resistance” |
ohm |
“Inductance” |
henry |
“Magnetic Field Strength” |
oersted |
“Magnetic Flux Density” |
tesla |
“Core Loss” |
W/Kg |
“Frequency” |
hertz |
“Power” |
watt |


Electrical Steel Sheet in Reel Form
- 50CS600
- 50CS1300
EI Lamination Size

Type |
Standard |
A |
B |
C |
D |
E |
F |
G |
H |
I |
J |
K |
R |
E/I |
EI |
35 |
35 |
29.5 |
9.6 |
5 |
7.7 |
19.5 |
24.5 |
5 |
- |
- |
- |
- |
3.184 |
41 |
41 |
33 |
13 |
6 |
8 |
21 |
27 |
6 |
- |
- |
- |
- |
3.134 |
48 |
48 |
40 |
16 |
8 |
8 |
24 |
32 |
8 |
- |
- |
- |
- |
3 |
54 |
54 |
45 |
18 |
9 |
9 |
27 |
36 |
9 |
- |
- |
- |
- |
3 |
57 |
57 |
47.5 |
19 |
9.5 |
9.5 |
28.5 |
38 |
9.5 |
- |
- |
- |
- |
3 |
57(2H) |
57 |
47.5 |
19 |
9.5 |
9.5 |
28.5 |
38 |
9.5 |
- |
38 |
4.75 |
3.8 |
3.042 |
57(4H) |
57 |
47.5 |
19 |
9.5 |
9.5 |
28.5 |
38 |
9.5 |
47.5 |
38 |
4.75 |
4.3 |
3.087 |
60 |
60 |
50 |
20 |
10 |
10 |
30 |
40 |
10 |
- |
- |
- |
- |
3 |
66 |
66 |
55 |
22 |
11 |
11 |
33 |
44 |
11 |
- |
- |
- |
- |
3 |
66(4H) |
66 |
55 |
22 |
11 |
11 |
33 |
44 |
11 |
56 |
44 |
5.5 |
4.5 |
3.092 |
76.2 |
76.2 |
63.5 |
25.4 |
12.7 |
12.7 |
38.1 |
50.8 |
12.7 |
- |
- |
- |
- |
3 |
76.2(4H) |
76.2 |
63.5 |
25.4 |
12.7 |
12.7 |
38.1 |
50.8 |
12.7 |
64 |
50.8 |
6.35 |
5 |
3.085 |
85.8 |
85.8 |
71.5 |
28.6 |
14.3 |
14.3 |
42.9 |
57.2 |
14.3 |
- |
- |
- |
- |
3 |
85.8(4H) |
85.8 |
71.5 |
28.6 |
14.3 |
14.3 |
42.9 |
57.2 |
14.3 |
71 |
57.2 |
7.15 |
5 |
3.066 |
96(4H) |
96 |
80 |
32 |
16 |
16 |
48 |
64 |
16 |
79 |
64 |
8 |
6 |
3.076 |
105(4H) |
105 |
97.31 |
35 |
17.46 |
17.46 |
52.39 |
69.85 |
17.46 |
87.31 |
69.85 |
8.7 |
5.537 |
3.081 |
114(4H) |
114 |
95 |
38 |
19 |
19 |
57 |
76 |
19 |
95 |
75 |
9.5 |
7 |
3.074 |
133.4(4H) |
133.35 |
111.125 |
44.45 |
22.225 |
22.225 |
56.675 |
88.9 |
22.225 |
111.125 |
88.9 |
11.113 |
7.14 |
3.056 |
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