HASTELLOY C-22 alloy - INKOSAS

1 A most versatile nickel-chromium-molybdenum-tungstenalloy available today withimproved resistance to bothuniform and localized corrosionas well as to a variety of mixedindustrial chemicals. The C-22alloy exhibits superior weldabilityand is used as overalloy fillerwire and weld overlayconsumables to improveresistance to Features3 Laboratory Corrosion Tests4 Field Evaluation5 Typical Applications6 Aqueous Corrosion Data8 Resistance to Localized Attack 10 Thermal Stability11 Isocorrosion Curves12 Physical Properties13 Hardness and Impact Strength 14 Tensile Data15 Fabrication16 Welding18 Machining21 Availability22 Sales Office Addresses24 HASTELLOY C-22 alloyCORROSION-RESISTANT alloys 2002 by Haynes

2 International, HaynesInternational, International, Inc., wasfounded in 1912 by ElwoodHaynes, an inventor of some ofthe first cobalt-based alloys . Thecompany has relied on a strongtechnology base ever alloys are knownthroughout the chemical processindustry as the premiercorrosion resistant high-temperature alloysare equally well known in theaerospace field for their uniqueheat-resistance qualities. Both ofthese groups of alloys weredeveloped and perfected inKokomo, International is stockedto respond immediately tovirtually any high performancealloy requirement.

3 The com-pany s technical backup andapplications knowledge C-22 alloy Excels in Pitting ResistanceHASTELLOY C-4 alloySamples were subjected to a solution of H2S04, HCI, 1% FeCl3 AND 1% for coupons 625 and C-4 were at 102 C, while C-276 and C-22 were at 125 alloyHASTELLOYC-276 alloyHAYNES 625 alloyHASTELLOY C-22 alloy2 Outstanding CorrosionResistanceHASTELLOY C-22 alloy is aversatile nickel-chromium-molybdenum-tungsten alloy withbetter overall corrosionresistance than other Ni-Cr-Moalloys available today, includingHASTELLOY C-276 and C-4alloys and alloy 625.

4 C-22 alloyhas outstanding resistance topitting, crevice corrosion, andstress corrosion cracking. It hasexcellent resistance to oxidizingaqueous media including wetchlorine and mixtures containingnitric acid or oxidizing acids withchloride ions. Also, C-22 alloyoffers optimum resistance toenvironments where reducingand oxidizing conditions areencountered in process of such versatility it canbe used where upset conditions are likely to occur orin multi-purpose alloy has exceptionalresistance to a wide variety ofchemical process environments,including strong oxidizers suchas ferric and cupric chlorides,chlorine, hot contaminatedsolutions (organic andinorganic)

5 , formic and aceticacids, acetic anhydride, andseawater and brine alloy resists the formationof grain-boundary precipitates inthe weld heat-affected zone,thus making it suitable for mostchemical process applications inthe as-welded FormsC-22 alloy is available in mostcommon product forms: plate,sheet, strip, billet, bar, wire,covered electrodes, pipe, forms of this alloy arefurnished in the solution heat-treated condition unlessotherwise of the areas of use forC-22 alloy are: Acetic Acid/Acetic Anhydride Acid Etching Cellophane Manufacturing Chlorination Systems Complex Acid Mixtures Electro-Galvanizing Rolls Expansion Bellows Flue Gas Scrubber Systems Geothermal Wells HF Furnace Scrubbers Incineration Scrubber Systems Nuclear Fuel Reprocessing Pesticide Production Phosphoric Acid Production Pickling Systems Plate Heat Exchangers Selective Leaching Systems SO2 Cooling Towers Sulfonation Systems Tubular Heat Exchangers Weld Overlay-ValvesField Test ProgramSamples of C-22

6 alloy arereadily available for laboratory orinplant corrosion of corrosion resistanceof the tested material can alsobe performed and the resultsprovided to the customer as afree technical service. Test C-22alloy and compare. Contact anyof the convenient locationsshown on the back cover of thisbrochure for test coupons C-22 alloy iscovered by ASME Section VIII,Division I. Plate, sheet, strip, bar,tubing, and pipe are covered byASME specifications SB-574,SB-575, SB-619, SB-622 andSB-626 and by ASTM specifica-tions B-574, B-575, B-619, B-622,and B-626.

7 DIN specification is17744 No. (all forms),TUV Werkstoffblatt 479 (allforms). NACE specification isMR-01-75. C-22 alloy falls withinthe range of UNS numberN06022 but has a morerestricted composition forimproved performance. Theseimprovements are of suchsignificance that it has beenwidely patented throughout Safety DataSheetsFor information concerningmaterial safety data, ask forMaterial Safety Data SheetsH2071 and FEATURES3 HASTELLOY C-22 alloyNominal Chemical Composition, Weight ** ** ** ** ** The undiluted deposited chemical composition of C-22 alloy covered electrodes has carbon and Si.

8 ** Maximum a As balanceHASTELLOY C-22 alloy4 ! ! "# $# " "# % $# $# ! $# % $# % & ! $# % ' % Laboratory Corrosion TestsDemonstrate Superiority ofHASTELLOY C-22 alloyField EvaluationsExhibits Excellent Corrosion ProtectionReactor Vessel10-15% Sulfuric Acid + Solids/Impurities212 F (100 C) 12 MonthsCorrosionRate(mpy)Remarks316L Stainless Steel>61 Sample DissolvedCarpenter 20Cb-3 alloy >57 Sample DissolvedAlloy 825>58 Sample DissolvedHASTELLOY B-2 alloy >58 Sample DissolvedHAYNES 625 alloy29 Severe Corrosion AttackHASTELLOY C-276 alloy28 Severe Corrosion AttackHASTELLOY C-22 Corrosion AttackPulverized Coal Fired SulfurOutlet Duct129 F (54 C) 27 MonthsDepth of AttackPittingCrevice(in.)

9 (in.)316L Stainless JS700 625 alloyNo C276 alloyNo C-22 alloyNo RefineryVaporizer203 F (95 C) 2 MonthsCorrosionRate(mpy)Remarks316L Stainless Steel139 Severe Crevice AttackCarpenter 20Cb-3 alloy227 Partially DissolvedAvesta 254 SMO alloy83 Pitting, Crevice AttackAllegheny AL-6XN alloy60 Pitting, Crevice AttackHAYNES 625 alloy29 Pitting, Crevice AttackHASTELLOY C-22 Crevice AttackRotary Kiln Industrial OrganicQuench Duct300 F (149 C) 4 MonthsCorrosionRate(mpy)RemarksCarbon Steel>353 Sample Dissolved316L Stainless Steel>160 Sample DissolvedAvesta 254 SMO alloy83 Severe Pitting AttackHAYNES 625 alloy64 Moderate Pitting AttackHASTELLOY C-276 alloy53 Moderate Pitting AttackHASTELLOY C-22 alloy27 Slight Pitting AttackAmmonium Sulfite-Type MillC-Stage Washer75 F (24 C) 8 MonthsDepth of AttackPittingCrevice(in.)

10 (in.)316L Stainless 254 SMO AttackHAYNES 625 AttackHASTELLOY C-22 AttackAmmonia Stripping ProcessWaste Water160 F (71 C) 3 MonthsDepth of AttackPittingCrevice(in.)(in.)Carbon Stainless AL-6XN AttackHAYNES 625 AttackHASTELLOY C-22 alloyNo AttackNo AttackChemical Processing IndustryFlue Gas Desulfurization (FGD)Refinery IndustryChemical Waste IncinerationRefinery IndustryChemical Waste Incineration5 HASTELLOY C-22 alloyHASTELLOY C-22 alloy6 This large fabrication ofHASTELLOY C-22 alloy is shownhere being readied for shipmentto a papermill in the alloy was selected for thisapplication after extensive testingin the actual bleach washerenvironment.