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iCARe® Save

Properties

The iCARe® Save 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.

Advantages

Save grades enable you to reduce the iron losses from the stators of synchronous machines. They are particularly useful for reducing iron losses in high-speed hybrid and electric traction machines, and generators which extend the range of electric vehicles.

The iCARe® grades offer better losses than those of the materials described in the standards (see the brand correspondence table below).

Applications

Save grades are most effective at reducing iron losses from machine parts which are subject to high base frequencies and additional harmonics. Save thus helps to improve machine efficiency, which leads to an increase in power density. Power density can be tuned to create a lighter, smaller machine, or a more powerful machine for a given weight. Driving range is extended as Save reduces machine weight and costs and saves battery energy.

Recommendations for use

Save grades can be used immediately after lamination punching. The punching effect can be eliminated by performing a stress relief annealing. This optimises their performance in applications with fine teeth, and enables a substantial part of the lower frequency area to be exploited. A C5-type coating is recommended.

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

Brand correspondance

  EN 10303 :2015 ASTM A1086 :2013 IEC/CEI 60404-8-8 :1991
Save 20-13 NO 20-13    
Save 20-15 NO 20-15 20T680 (15,0) NO 20 (15,0)
Save 25-14 NO 25-14    
Save 25-16   25T730 (16,0)  
  NO 25-17    
Save 27-15 NO 27-15    
Save 27-17   27T770 (17,0)  
  NO 27-18    
Save 30-14.5      
Save 30-15      
  NO 30-16    
Save 30-17      
    30T820 (18,0)  
  NO 30-19    
Save 35-18      
  NO 35-19    
Save 35-20      
  NO 35-22    

This brand correspondence above is based on loss level at 1T/400 Hz. Regarding polarization, Save grades are at the same level or better than the standard requirements.

Magnetic properties

  Conventional density (kg/dm3) Max loss (W/kg) Min polarisation (T) Max anisotropy of loss (±%) at 400 Hz at 1T Min number of bends Min stacking factor
At 400 Hz at 1T At 700 Hz at 1T At 2,500 A/m At 5,000 A/m At 10,000 A/m
    Guaranteed Indicative Guaranteed Guaranteed Indicative Guaranteed Guaranteed Guaranteed
Save 20-13 7.60 13 29  1.49 1.60  1.70  15 5 0.93
Save 20-15 7.60 15 32 1.49 1.60 1.70 15 5 0.93
Save 25-14 7.60 14 34 1.49 1.60 1.70 15 5 0.94
Save 25-16 7.60 16 37 1.49 1.60 1.70 15 5 0.94
Save 27-15  7.60 15 37 1.49 1.60 1.70 15 5 0.94
Save 27-17 7.60 17 40 1.49 1.60 1.70 15 5 0.94
Save 30-14.5 7.60 14.5 37 1.49 1.60 1.70 15 5 0.95
Save 30-15 7.60 15 38 1.49 1.60 1.70 15 5 0.95
Save 30-17 7.60 17 41 1.49 1.60 1.70 15 5 0.95
Save 35-18 7.60 18 44 1.49 1.60 1.70 15 5 0.95
Save 35-20 7.60 20 48 1.49 1.60 1.70 15 5 0.95

Mechanical properties

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

  Direction Re (MPa) Rm (MPa) Re/Rm A80 (%) HV
Save 20-13  L 410 - 450 520 - 560 0.78 - 0.83 10 - 20 200 - 230
T 425 - 465 535 - 575 0.78 - 0.83 10 - 20 200 - 230
Save 20-15  L 390 - 430 510 - 550 0.76 - 0.81 15 - 30 195 - 225
T 410 - 450 540 - 580 0.76 - 0.81 15 - 30 195 - 225
Save 25-14  L 410 - 450 520 - 560 0.78 - 0.83 12 - 25 200 - 230
T 425 - 465 535 - 575 0.78 - 0.83 12 - 25 200 - 230
Save 25-16  L 390 - 430 510 - 550 0.76 - 0.81 15 - 30 195 - 225
T 410 - 450 540 - 580 0.76 - 0.81 15 - 30 195 - 225
Save 27-15  L 410 - 450 520 - 560 0.78 - 0.83 12 - 25 200 - 230
T 425 - 465 535 - 575 0.78 - 0.83 12 - 25 200 - 230
Save 27-17  L 390 - 430 510 - 550 0.76 - 0.81 15 - 30 195 - 225
T 410 - 450 540 - 580 0.76 - 0.81 15 - 30 195 - 225
Save 30-14.5  L 410 - 450 520 - 560 0.78 - 0.83 12 - 25 200 - 230
T 425 - 465 535 - 575 0.78 - 0.83 12 - 25 200 - 230
Save 30-15  L 410 - 450 520 - 560 0.78 - 0.83 12 - 25 200 - 230
T 425 - 465 535 - 575 0.78 - 0.83 12 - 25 200 - 230
Save 30-17  L 390 - 430 510 - 550 0.76 - 0.81 15 - 30 195 - 225
T 410 - 450 540 - 580 0.76 - 0.81 15 - 30 195 - 225
Save 35-18 L 410 - 450 520 - 560 0.78 - 0.83 10 - 20 200 - 230
T 425 - 465 535 - 575 0.78 - 0.83 10 - 20 200 - 230
Save 35-20  L 390 - 430 510 - 550 0.76 - 0.81 15 - 30 195 - 225
T 410 - 450 540 - 580 0.76 - 0.81 15 - 30 195 - 225

Further information

For more information about ArcelorMittal’s iCARe® range of electrical steels and the support we can provide, please visit: http://automotive.arcelormittal.com/automotive/icare.

For information about the packaging of our materials, please click here.

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