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iCARe® Torque



The iCARe® Torque product family comes with guaranteed losses at 400Hz and indicative maximum values at 700Hz. These values are representative of the steel’s behaviour at high frequencies.


Torque grades assist flux generation, allowing the motor to develop more mechanical output. If mechanical output is not an issue, permanent magnet or copper winding can be reduced to save on costs.


Torque grades are suitable for machines which need high torque at low speeds. They provide the fast acceleration required by hybrid and electric vehicles.

Magnetic properties

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ArcelorMittal name Conventional density (kg/dm3) Max. loss (W/kg) at 400 Hz at 1T [Guaranteed] Max. loss (W/kg) at 700 Hz at 1T [Indicative] Min. polarisation (T) at 2,500 A/m [Guaranteed] Min. polarisation (T) at 5,000 A/m [Guaranteed] Min. polarisation (T) at 10,000 A/m [Indicative] Max. anisotropy of loss (±%) at 400 Hz at 1T [Guaranteed] Min. number of bends [Guaranteed] Min. stacking factor [Guaranteed]
Torque 30-17 7.65 17 40 1.55 1.65 1.76 15 5 0.95
Torque 35-20 7.65 20 50 1.55 1.65 1.76 15 5 0.95

Mechanical properties

The data in the following table is provided for information purposes only.

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ArcelorMittal name Direction Re (MPa) Rm (MPa) Re/Rm A80 (%) HV
Torque 30-17 L 340 - 380 470 - 510 0.71 - 0.76 13 - 28 170 - 200
T 360 - 400 490 - 530 0.71 - 0.76 13 - 28 170 - 200
Torque 35-20 L 340 - 380 470 - 510 0.71 - 0.76 13 - 28 170 - 200
T 360 - 400 490 - 530 0.71 - 0.76 13 - 28 170 - 200


Torque grades can be used immediately after lamination punching. The effect of punching can be eliminated if a stress relief annealing is applied. This optimises the performance of the Torque grades in applications with fine teeth. It can also provide substantial performance improvements in the lower frequency range. To achieve these effects, a C5 type coating is advised.

Torque stacks can be produced using existing assembly techniques such as interlocking or welding.

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