Patent ID: 11970757
Assignee: THYSSENKRUPP AG
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  H  Y | IPC C

Claim 18:
19. A non-oriented electrical steel strip or sheet comprising, in % by weight:
3.20 to 3.40 of Si,
0.85 to 1.10 of Al,
0.07 to 0.18 of Mn,
0.01 to 0.04 of P,
0.0003 to 0.0030 of S,
0.0005 to 0.0025 of N,
0.0010 to 0.0050 of C,
0.0015 to 0.0040 of Ti,
0.01 to 0.08 of Cr, up to 0.05 in total of Nb+Mo+V,
balance Fe and unavoidable impurities below 1% by weight,
wherein the steel strip or sheet in a cold rolled and annealed condition with a thickness of 0.255-0.310 mm has a specific electrical resistance at 50° C. of 0.62 to 0.65 μΩm and has loss values of not more than 2.3 W/kg at a polarization of 1.5 T and 50 Hz, not more than 14.2 W/kg at a polarization of 1.0 T and 400 Hz, not more than 33 W/kg at a polarization of 1.0 T and 700 Hz, not more than 58 W/kg at a polarization of 1.0 T and 1000 Hz, in each case, at a sheet thickness of 0.280 to 0.31 mm, and the steel strip or sheet has loss values of not more than 2.2 W/kg at a polarization of 1.5 T and 50 Hz, not more than 13.6 W/kg at a polarization of 1.0 T and 400 Hz, not more than 32 W/kg at a polarization of 1.0 T and 700 Hz, not more than 55 W/kg at a polarization of 1.0 T and 1000 Hz, in each case, at a sheet thickness of 0.255 to 0.280 mm.