Nihonweld NHF-ST12 description: NHF-ST12 Covered electrode develop high hardness and abrasion resistance and good corrosion resistance. These properties make NHF-ST12 the choice for wood cutting saws and bars and for industrial cutting applications for carpet, plastics, papers, and chemical industries. It is non- forgeable and can be machines with difficulty using carbide tools. NHF-ST12 bonds well to all weldable-grade steels, including stainless.