

Developed by Baosteel, B35A250 is a 0.35mm thick non-oriented electrical steel engineered for high-efficiency electromagnetic applications. Its composition includes ~2.5% silicon, enabling low iron loss (2.10-2.30 W/kg) and high magnetic permeability, while a stacking coefficient ≥95% ensures dense, efficient core assembly.
Ideal for motor and transformer cores, this material supports advanced energy-saving technologies. The self-adhesive variant B35A250-Z offers enhanced corrosion resistance and thermal stability. Compliant with Q/BQB 480-2021, it meets critical performance standards for new energy vehicles and high-efficiency power systems.
Specification Parameters
| Standard of electromagnetic properties | ||||||
| Grade | Thickness (mm) | Max.Core loss P55 (W/kg) | Min.Magnetic Polarization J5000 (T) | Min.Stacking Factor | Min.Number of Bends | Conventional Density(kg/dm³) |
| B35A250 | 0.35 | 2.45 | 1.64 | 0.95 | 2 | 7.6 |
| Typical electromagnetic properties | ||||||||||
| Grade | Thickness(mm) | Conventional Density (kg/dm²) | Specific Total Loss(W/kg) | Magnetic Polarization(T) | ||||||
| P1.0/5 | P1.50 | P10/50 | P | J1000 | J2500 | J5000 | J100 | |||
| B35A250 | 0.35 | 7.6 | 0.95 | 2.25 | 1.22 | 2.78 | 1.48 | 1.57 | 1.66 | 1.78 |
| Typical mechanical properties | |||||||||||
| Grade | Thickness(mm) | YieldStrength(MPa) | Tensile Strength(MPa) | Elongation(%) | Hardness | Number of Bends | Stacking Factor | ||||
| L | C | L | C | L | C | HV1 | L | C | |||
| B35A250 | 0.35 | 409 | 424 | 537 | 550 | 22 | 24 | 216 | 9 | 9 | 0.985 |