Bohler A 7 CN-IG description: GTAW rod of type W 18 8 Mn / ER307 for numerous applications. The weld metal offers exceptionally high ductility and elongation together with outstanding crack resistance. There is no fear of embrittlement when operating down to service temperatures of -110C or above +500C. The scaling resistance goes up to +850C. When working at service temperatures above +650C please contact the supplier. The weld metal can be post weld heat treated without any problems. The deposit will work harden and offers good resistance against cavitation.