Songhan Plastic Technology Co.,Ltd.

AK Steel CARLITE® M-4 Grain Oriented Electrical Steel

Category Metal , Electronic/Magnetic Alloy
Manufacturer AK Steel
Trade Name
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF AK Steel CARLITE® M-4 Grain Oriented Electrical Steel.pdf
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Material Notes:
Oriented Electrical Steels are iron-silicon alloys that were developed to provide the low core loss and high permeability required for efficient and economical electrical transformers. First produced commercially by AK Steel, these magnetic materials exhibit their superior magnetic properties in the rolling direction. This directionality occurs because the steels are specially processed to create a very high proportion of grains within the steel which have similarly oriented atomic crystalline structures relative to the rolling direction. In iron-silicon alloys, this atomic structure is cubic and the crystals are most easily magnetized in a direction parallel to the cube edges. By a combination of precise steel composition, rigidly controlled cold rolling and annealing procedures, the crystals of these oriented electrical steels are aligned with their cube edges nearly parallel to the direction in which the steel is rolled. Consequently, they provide superior permeability and lower core loss when magnetized in this direction. AK Steel’s CARLITE grain Oriented Electrical Steels (GOES) products are supplied with CARLITE 3 insulative coating, an inorganic coating equivalent to ASTM A976 C-5. CARLITE 3 insulation is ideal for materials that will be used in the form of sheared laminations for power transformers and other apparatus with high volts per turn. In addition to supplying all the benefits of C-5 insulation, CARLITE 3 provides other important advantages which include: Potential for reduced transformer building factor from added resistance to elastic strain damage Potential for reduction of magnetostriction related transformer noise High stacking factor Easy assembly due to smoothness of coating (low coefficient of friction)Information provided by AK Steel
Physical Properties Metric English Comments
Density 7.65 g/cc
0.276 lb/in³
Thickness 279 microns
11.0 mil
Mechanical Properties Metric English Comments
Hardness, Knoop 167
Hardness, Rockwell B 81
Tensile Strength, Ultimate 352 MPa
51000 psi
In rolling direction
Tensile Strength, Yield 331 MPa
48000 psi
In rolling direction
Elongation at Break 9.0 %
9.0 %
in 2"
Modulus of Elasticity 122 GPa
17700 ksi
In rolling direction
143 GPa
20700 ksi
at 20° to rolling direction
200 GPa
29000 ksi
at 55° to rolling direction
236 GPa
34200 ksi
at 90° to rolling direction
258 GPa
37400 ksi
at 45° to rolling direction
Electrical Properties Metric English Comments
Electrical Resistivity 0.0000510 ohm-cm
0.0000510 ohm-cm
Descriptive Properties Value Comments
Magnetostriction 10^8 -116
At 60Hz, 1.7T (Thickness 0.011")
At 60Hz, 1.5T (Thickness 0.011")
Minimum Lamination Factor (%) 95
Minimum Peak Permeability at 10 Oe 1780
Typical Lamination Factor (%) 96.9
Typical Peak Permeability at 10 Oe 1845
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