{"id":6895,"date":"2024-09-17T09:37:33","date_gmt":"2024-09-17T09:37:33","guid":{"rendered":"https:\/\/haynesintl.com\/?page_id=6895"},"modified":"2024-09-17T09:37:37","modified_gmt":"2024-09-17T09:37:37","slug":"high-performance-alloys-for-seawater-service","status":"publish","type":"page","link":"https:\/\/haynesintl.com\/en\/high-performance-alloys-for-seawater-service\/","title":{"rendered":"High Performance Alloys for Seawater Service"},"content":{"rendered":"\n

With its considerable industrial benefit as an effluent coolant, seawater remains a corrosive environment to many structural materials. Problems related to localized corrosion, erosion\/wear, and biofouling represent limitations to the use of many metallic materials. Cumbersome cathodic protection techniques, unanticipated maintenance costs, along with reliability of equipment, safety to personnel, and environmental concerns are leading to a wider use of higher performance nickel-based alloys in seawater services.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Over the years, the nickel-chromium-molybdenum\/tungsten alloys have proven to be among the most reliable and cost-effective materials for aggressive seawater applications. Of these, INCONEL\u00ae<\/sup> 625 is considered acceptable and the HASTELLOY\u00ae<\/sup>\u201cC-type\u201d alloys (C, C-4, C-276, C-22\u00ae<\/sup>) are considered optimum.<\/p>\n\n\n\n

Nominal Composition Weight %<\/h3>\n\n\n\n
\n \n\n \n \n \n \n \n \n
\n Alloy <\/td>\n \n Nickel <\/td>\n \n Chromium <\/td>\n \n Molybdenum <\/td>\n \n Tungsten <\/td>\n \n Others <\/td>\n <\/tr>\n
\n C <\/td>\n \n Balance <\/td>\n \n 16 <\/td>\n \n 16 <\/td>\n \n 4 <\/td>\n \n - <\/td>\n <\/tr>\n
\n 625 <\/td>\n \n Balance <\/td>\n \n 21.5 <\/td>\n \n 9 <\/td>\n \n - <\/td>\n \n 3.6 Niobium + Tantalum <\/td>\n <\/tr>\n
\n C-276 <\/td>\n \n Balance <\/td>\n \n 16 <\/td>\n \n 16 <\/td>\n \n 4 <\/td>\n \n 0.005 Carbon Typical <\/td>\n <\/tr>\n
\n C-4 <\/td>\n \n Balance <\/td>\n \n 16 <\/td>\n \n 16 <\/td>\n \n 0 <\/td>\n \n 0.005 Carbon Typical <\/td>\n <\/tr>\n
\n C-22\u00ae<\/sup> <\/td>\n \n Balance <\/td>\n \n 22 <\/td>\n \n 13 <\/td>\n \n 3 <\/td>\n \n 0.005 Carbon Typical <\/td>\n <\/tr>\n <\/table>\n<\/div>