Nihonweld NHF-700B description: NHF-700B is a smooth running, AC/DC, rutile type electrode which deposits an air hardening martensitic Cr-Mo –V alloy, exhibiting high abrasion resistance, and able to maintain a cutting edge. It gives smooth, stable arcing with low spatter and is characterized by a uniform well built-up deposit, exhibiting excellent slag detachability. Stringer passes and normal weaving may be employed; a short arc length is recommended and touch welding may also be used with either AC or DC welding current. When welding high carbon or aloy steels of high hardenability, preheating is recommended to avoid cracking; alternatively a “buffer” layer of N-7018 or N-7016 may be used.