Cold-rolled non-grain oriented (CRNGO) magnetic sheets
Cold-rolled non-grain oriented (CRNGO) magnetic sheets
As it is obvious, CRNGO sheets do not contain oriented crystals in rolling direction and present more loss (per kg) and lower magnetic saturation level compared to CRGO ones. Hence, this type is mostly applied when the loss is not that much important (like low-size transformers and inductors) or while the flux cannot flow in a particular direction, then crystal orientation would not work properly (like rotary electrical machines consisting motors and generators with radial magnetic field and some induction furnace yokes).
Below table presents the specifications and main parameters for various grades of normal and low-loss CRGO magnetic core sheets.
Thickness (mm) |
According to AISI Std DIN EN 10106 |
According to AISI Std AISI2 |
Density (Kg/m3) | Core loss per kg unit (W/KG) |
Saturation level magnetic flux density (T) | |
Magnetic Flux Density 1 Tesla | Magnetic Flux Density 1.5 Tesla | |||||
0.35 | M235-35A | —– |
7600 | 0.95 | 2.35 |
1.49 |
M250-35A | M15 | 1.05 | 2.50 | |||
M270-35A | M19 |
7650 | 1.10 | 2.70 | ||
M300-35A | M22/M27 | 1.20 | 3.00 | |||
M330-35A | M36 | 1.30 | 3.30 | |||
0.50 | M250-50A | —– |
7600 | 1.05 | 2.50 | |
M270-50A | M15 | 1.10 | 2.70 | |||
M290-50A | M19 | 1.15 | 2.90 | |||
M310-50A | M22/M27 |
7650 | 1.25 | 3.10 | ||
M330-50A | M36 | 1.35 | 3.30 | |||
M350-50A | M43 | 1.50 | 3.50 | 1.50 | ||
M400-50A | —– |
7700 | 1.70 | 4.00 | 1.53 | |
M470-50A | M45 | 2.00 | 4.70 | 1.54 | ||
M530-50A | —– | 2.30 | 5.30 | 1.56 | ||
M600-50A | M47 | 7750 | 2.60 | 6.00 | 1.57 | |
M700-50A | —– |
7800 | 3.00 | 7.00 |
1.60 | |
M800-50A | —– | 3.60 | 8.00 | |||
M940-50A | —– | 7850 | 4.20 | 9.40 | 1.62 | |
1-Related to the Steel and Iron Institute of USA (American Iron and Steel Institute) | ||||||
2- Equal to magnetic flux density at 800 A/m magnetic field strength | ||||||