RA333 Data Sheet [Heat Resistant Alloys] - Rolled Alloys

RA333 ® 27Aqueous CorrosionRA333 has good aqueous corrosion resistance and isessentially immune to chloride stress corrosioncracking.RA333 is suggested when the service conditions rangefrom liquid acids to temperatures of 2000°F (1100°C)or higher.RA333 Sulfuric Acid Corrosion RatesMils/Year - H 2SO 4ConcentrationTest TemperatureAir Free150°F (65.6°C) 10% 20% 40% 50% 60% 70%RA333 2.3 2.8 -- -- -- --176°F (80°C)*RA333 2.9 -- 5.4 22.4 23.6 26.5316 151 -- -- -- -- --625 2.3 -- -- -- -- --825 4.7 -- -- -- -- --200°F (93.3°C)RA333 19.5 23.0 -- -- -- --Test TemperatureAerated150°F (65.6°C) 10% 20% 30% 40% 50% 60% 70% 80% 90%RA333 0.10 0.1 -- -- -- -- -- -- --176°F (80°C)RA333 .6 0.1 41 35 52 42 43 120 44316 .6 270 284 -- -- -- -- -- --625 .6 -- -- 0.7 42 41 67 -- --825 .6 16 53 40 22 20 22 11 --200°F (93.3°C)RA333 18.6 29.5 -- -- -- -- -- -- --Note: The information on these various materials was all developed in the same laboratory in order to provide a direct comparison among alloysin commercially pure sulfuric acid. Corrosion rates shown are valid only for the precise conditions of this test and may not necessarily agree withthose determined in other laboratories under nominally similar conditions. Samples about 1/4 x 5/8 x 1” were tasted in 1000ml flasks with 500ml of solution.Exposure times ranged from 300 to 400 hours. Acid was not replenished over duration of test.* Average of five 48 hour periods + average of three 48 hour periods.Corrosion in 15% H2SO4 plus 15%Oakite ® PC-10 inhibitor, 160°F (71°C)Corrosion RateAlloy mils/year mdd20Cb-3 ® 5.00 (28)600 8.07 (47)RA333 9.85 (57)RA330 18.8 (104)1018 steel 293 (1600)Application: Baskets to anneal and pickle alloy steelparts.Source: Rolled Alloys Investigation 12-84.Hydrochloric Acid Corrosion Ratesmils/year -- HCl concentrationTest Temperature°F (°C) 2% 5% 15% 25% 37%80 (27) 6.6 8.5 6.6 6.4 23150 (66) 60 196 194 185 361Simonds Saw and Steel Co. data. RA333 rough forged barwas used at Simonds for pickling racks in 150°F 15% HCl.Service experience was reasonably favorable (as much forready availability of bar as for its corrosion resistance).