NSB-310 is a stainless steel electrode which gives the deposited metal of 27% Cr 21% Ni stainless steel with the fully austenitic structure. The deposited metal has excellent corrosion resistibility and heat resistibility and shows distinguished ductility because the Ni alloy contents are higher than 309-series electrode.stainless clad steel. Welding of dissimilar steels such as mild steel to air-hardening steel (Cr-Mo steel).