Characters of Alloy 59 l Outstanding resistance to a wide range of corrosive media under oxidising and reducing conditions l Excellent resistance to pitting and crevice corrosion and freedom from chloride-induced stress-corrosion cracking [1] l Excellent resistance to mineral acids, such as nitric, phosphoric, sulphuric and hydrochloric acids and in particular to sulphuric and hydrochloric acid mixtures l excellent resistance to contaminated mineral acids l Good corrosion resistance to hydrochloric acid over the whole concentration range up to 40 °C (104 °F). l Good workability and weldability without susceptibility to post-weld cracking l Approval for pressure-vessel use with wall temperatures of –196 to 450 °C (– 320 to 840 °F) l Approved in NACE Standard MR0175, to the highest Level VII for sour gas service |