Non-oriented electrical steel sheet and production process thereof

A non-oriented electrical steel sheet comprising in % by mass:

• 0.06% or less of C;
• from 1.0% or more to 3.5% or less of Si;
• from 0.05% or more to 3.0% or less of Mn;
• 2.5% or less of Al;
• 0.30% or less of P;
• 0.04% or less of S;
• 0.02% or less of N;
• at least one element selected from the group consisting of Nb, Ti, Zr and V in the range satisfying equation (1) below, wherein at least Nb is present as the at least one element in an amount of more than 0.02%;
• as arbitrarily added elements, from 0% or more to 8.0% or less of Cu, from 0% or more to 2.0% or less of Ni, from 0% or more to 15.0% or less of Cr, from 0% or more to 4.0% or less of Mo, from 0% or more to 4.0% or less of Co, from 0% or more to 4.0% or less of W, from 0% or more to 0.5% or less of Sn, from 0% or more to 0.5% or less of Sb, from 0% or more to 0.3% or less of Se, from 0% or more to 0.2% or less of Bi, from 0% or more to 0.5% or less of Ge, from 0% or more to 0.3% or less of Te, from 0% or more to 0.01% or less of B, from 0% or more to 0.03% or less of Ca, from 0% or more to 0.02% or less of Mg and from 0% or more to 0.1% or less of REM;
• and a balance consisting of Fe and impurities;
• and
• having a recrystallized fraction being less than 90%;
• 0<Nb/93+Zr/91+Ti/48+V/51−(C/12+N/14)<5×10−3 (1)
• (in equation (1), Nb, Zr, Ti, V, C and N represents the contents (% by mass) of respective elements).