Bohler FOX NIBAS 70/20 description: Basic electrode, core wire alloyed, corresponding to DIN EL-NiCr 19 Nb for high- grade welding of nickel-base alloys, high-temperature and creep resisting steels, heat resisting and cryogenic materials, low-alloyed problem steels and dissimilar joints. Ferritic-austenitic joints for service temperatures above +300C or for applications where a post weld heat treatment is required. Suitable in pressure vessel fabrication for -196C to +650C, otherwise up to the scaling resistance temperature of +1200C (S-free atmosphere). Insusceptible to embrittlement, highly resistant to hot cracking, furthermore, C-diffusion at high temperature or during heat treatment of dissimilar joints is largely reduced. Thermal shock resistant, stainless, fully austenitic, low coefficient of thermal expansion between the coefficient values of C-steel and austenitic CrNi (Mo)-steel.