HP grades
Highly-permeable electrical steel strip grades for improved efficiency
Waelzholz HP grades are electrical steel strip grades with a special high magnetic permeability. We also produce significantly higher polarization at the same energy input with our HP grades in comparison with standard grades. The result is excellent magnetizability in both grade variations as well as a significant increase in thermal conductivity in the HP variation.
Optimal polarization and thermal conductivity for electrical drives
These highly-permeable electrical steel strip grades are ideal for high-performance electrical drives. Due to their high permeability values they enable higher engine torque.`To top it all off, our HP grades have excellent thermal conductivity, which ensures that heat built up during motor operation can easily escape.
Application examples for HP grades
Further applications
Higher polarization at the same energy input
The higher polarization of our HP grades in comparison with standard grades provides our customers with unparalleled magnetizability and a high degree of efficiency and effectiveness.
HP grades: the impact of alloy content
In comparison with standard grades, our HP grades have significantly better polarization and thermal conductivity.
Magnetic properties of HP grades
Unit system
| Grade | Min. magnetic polarization at 2,500 A/m |
Typ. yield strength |
Typ. tensile strength |
Typ. elongation A80 |
Typ. hardness |
Thermal conductivity λ | |
| DIN EN 10106 in T |
Waelzholz in T |
in MPa |
in MPa |
in % |
HV5 |
in W/mK |
|
| Nominal thickness: 0.50 mm | |||||||
| HP M 350-50 A HP M 400-50 A HP M 470-50 A HP M 530-50 A HP M 600-50 A HP M 700-50 A HP M 800-50 A HP M 940-50 A |
1.50 1.53 1.54 1.56 1.57 1.60 1.60 1.62 |
1.56 1.58 1.59 1.61 1.62 1.65 1.65 1.66 |
340 340 300 300 295 295 295 295 |
470 470 430 430 415 415 415 415 |
29 29 30 30 34 34 34 34 |
160 160 135 135 130 130 130 130 |
24.5 24.5 30.3 30.3 34.6 34.6 34.6 34.6 |
| Nominal thickness: 0.65 mm | |||||||
| HP M 400-65 A HP M 470-65 A HP M 530-65 A HP M 600-65 A HP M 700-65 A HP M 800-65 A HP M 1000-65 A |
1.52 1.53 1.54 1.56 1.57 1.60 1.61 |
1.57 1.58 1.59 1.61 1.62 1.66 1.66 |
335 340 340 300 295 295 295 |
460 470 470 430 415 415 415 |
30 30 30 32 34 34 34 |
165 165 165 140 130 130 130 |
24.5 24.5 24.5 30.3 34.6 34.6 34.6 |
| Nominal thickness: 1.00 mm | |||||||
| HP M1400-100 A | 1.60 | 1.66 | 295 | 415 | 34 | 130 | 34.6 |