| abstract |
One form of the ferrite series stainless steel plate of the present invention is to contain C in terms of quality %：Less than 0.03%, N：Less than 0.05%, Si：Less than 1%, Mn：Less than 1.2%, Cr：More than 14% and less than 28%, Nb：More than 8 (C+N) and less than 0.8% and Al：Less than 0.1%, remainder includes Fe and inevitable impurity, and is formed with the overlay film of the formula of satisfaction 1 on the surface, wherein, d f Represent thickness (nm), the Cr of overlay film f Represent Cr cations point rate, the Si in overlay film f Represent Si cations point rate, the Al in overlay film f Represent the Al cation point rates in overlay film.d f ×Cr f +5(Si f +3Al f )≤2.0 (formula 1). |