Characteristics and typical fields of application Rutile electrode of type E 23 12 2 L / 309MoL providing increased delta ferrite contents (FN ~20) in the weld deposit for safe and crack resistant dissimilar joint welds as well as claddings or root passes of clad steel. BÖHLER FOX CN 23/12 Mo-A is noted for its superior welding characteristics and metallurgy. It can be used on AC and DC. Other advantages include high current carrying capacity, minimum spatter formation, self releasing slag, smooth and clean weld profile, safety against formation of porosity due to the moisture resistant coating and its packaging into hermetically sealed tins. Operating temperature from –10 °C to +300 °C and for weld surfacing (1st layer) up to +400 °C. Base materials Dissimilar joint welds: mild steels and low-alloyed constructional and QT-steels among themselves or among each other; unalloyed as well as low-alloyed boiler or constructional steels with stainless Cr-, CrNi- and CrNiMo-steels; ferritic-austenitic joint welds in boiler and pressure vessel parts. Weld surfacing: for the first layer of corrosion resistant surfacing on P235GH, P265GH, S255N, P295GH, S355N - S500N; for the first layer of corrosion resistant weld claddings on high temperature quenched and tempered fine-grained steels acc. AD-Merkblatt HPO, class 3.