Posco

Posco Holdings Inc.

Il-Nam Yang

Chang Soo Park

Hyung Don Joo

June Soo Park

Dae-Hyun Song

Junesoo Park

A non-oriented electrical steel sheet according to an embodiment of the present invention includes, in wt %, Si: 2.2 to 4.5%, Mn: 0.5% or less (excluding 0%), Al: 0.001 to 0.5%, Sn: 0.07 to 0.25%, and N: 0.0010 to 0.0090%, and the balance of Fe and inevitable impurities. A surface layer portion existing in an inner direction from a surface of the steel sheet and a central portion existing inside the surface layer portion are included, and the central portion includes N at 0.005 wt % or less, and the surface layer portion further includes N at 0.001 wt % or more compared to the central portion; and the surface layer portion has an average grain size of 60 μm or less, while the central portion has an average grain size of 70 to 300 μm.

Non-oriented electrical steel sheet and method for manufacturing same

The present invention relates to a grain-oriented electrical steel sheet including 2.0 to 6.0 wt % of Si, 0.01 wt % or less (excluding 0 wt %) of C, 0.01 wt % or less (excluding 0 wt %) of N, and 0.005 to 0.1 wt % of Co, and including a balance of Fe and other inevitable impurities.

Grain-oriented electrical steel sheet and manufacturing method therefor

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Pohang-si, South Korea

Il-Nam Yang