P:\P25065\H-# Literature\H-2082 - Haynes International, Inc.

AQUEOUS CORROSION DATAComparative Aqueous Corrosion Data on Wrought ProductsConcentration, Test Average Corrosion Rate per Year, mils*% by Temperature ULTIMET ® 6B C-276 alloyweight °F °C alloy alloy alloy 20CB-3Hydrochloric Acid 1 Boiling 0.3 170 13 81Nitric Acid 65 Boiling 6 5434 848 8P 2O 5(Commercial Grade) 54 240 116 8 15 28 36Sulfuric Acid 10 Boiling 99 232 18 22Sulfuric Acid + 23 Boiling 2 2888 55 27201.2% HCl +1% FeCl 3+1% CuCl 2(ASTM G28B)Sulfuric Acid + 42 g/l 50 Boiling 8 14 250 10Fe 2(SO 4) 3(ASTM G28A)* To convert mils per year (mpy) to mm per year, divide by 40.Comparative Aqueous Corrosion Data on Cast ProductConcentration, TestAverage Corrosion Rate per Year, mils% by Temperature ULTIMET CX-2MW 2 AMS 5373 CF-3M 2weight °F °C alloy 1 (C-22) alloy 6 1 (316LSS)Ferric Chloride 10 Boiling 1 156 19989 20925Nitric Acid 65 Boiling 8 117 2890 14P 2O 5(Commercial Grade) 54 240 116 8 13 35 28Sulfuric Acid 10 Boiling 84 26 7269 634Sulfuric Acid + 23 Boiling 41 27 3181 35571.2 HCl +1% FeCl 3+1% CuCl 2(ASTM G28B)Sulfuric Acid + 42 g/l 50 Boiling 10 71 61 27Fe 2(SO 4) 3(ASTM G28A)1As-Cast Condition 2 Cast + Annealed ConditionULTIMET ® alloy8