Bohler CN 13/4-IG description: GMAW solid wire of low-carbon type 13% Cr 4% Ni suited for soft-martensitic steels like 1.4313 / CA 6 NM. Designed with precisely tuned alloying composition creating a weld deposit featuring very good ductility, CVN toughness and crack resistance despite its high strength. BOHLER CN 13/4-IG and the analogous GTAW rod as well as the coated stick electrode BOHLER FOX CN 13/4 are very popular in the construction of hydro turbines.