Characteristics AVESTA P12-R basic is a nickel base electrode intended for 6Mo steels such as 254 SMO. It can also be used for welding nickel base alloys such as Inconel 625 and Incoloy 825. In chloride containing environments, the electrode offers particularly high resistance to pitting, crevice corrosion and stress corrosion cracking. As it has a fully austenitic structure, P12-R is slightly more sensitive to hot cracking than, for example, 316L. Consequently, low heat input and careful control of the interpass temperature are essential. Interpass temperature: Max. 100°C. Heat input: Max. 1.5 kJ/mm. Heat treatment: Generally none (in special cases quench annealing at 1150 – 1200°C). Structure: Fully austenitic. Scaling temperature: Approx. 1100°C (air). Corrosion resistance: Maximum resistance to pitting and cervice corrosion in chloride containing environments. Good resistance in sulphuric and phosphoric acids contaminated by chlorides. Approvals • CE • CWB • TÜV