Bohler NIBAS 70/20-IG description: GTAW rod for 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 from -196C to +550C, otherwise resistant to scaling up to +1200C (S-free atmosphere). Not susceptible to embrittlement, C-diffusion at elevated temperatures largely inhibited. Resistant to thermal shocks, corrosion resistant, fully austenitic, low coefficient of thermal expansion.