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HASTELLOY C-22 alloy - INKOSAS

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 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.

7 HASTELLOY ® C-22 alloy The largest fabrication of HASTELLOY ® C-22 alloy known to-date is shown here being thin-sheet lined for exposure in a utility flue-gas ...

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Transcription of 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 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.

2 Both ofthese groups of alloys weredeveloped and perfected inKokomo, International is stockedto respond immediately tovirtually any high performancealloy requirement. 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. 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.

3 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), 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 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.

4 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. 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.** Maximum a As balanceHASTELLOY C-22 alloy4 !

5 ! "# $# " "# % $# $# ! $# % $# % & ! $# % ' % 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.)(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.)

6 (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. It has alreadygiven over 10 years of servicewith no corrosive attack. Twenty different materials weretested for this hydrofluoric acidprescrubber after the originalmaterial failed. C-22 alloy hadfour times better corrosion resis-tance than the original materialand 20 percent better than thenext candidate.

7 The processinvolves 20 percent HF, 64 per-cent H2SO4 and 16 percentwater at 150 to 200 rocket propellant effluents and salt air causedpitting and crevice corrosion attack of stainless alloy was selected over 19 different alloys for theclamshell bellows after extensive testing. The bellowshave been in service for more than 12 electrogalvanizing finish-ing rolls made of HASTELLOYC-22 alloy are ready for place-ment in a steel finishingmanufacturing line. C-22 alloyhelps reduce defects on the rollswhich is necessary to producedefect free galvanized steel forthe automotive APPLICATIONS7 HASTELLOY C-22 alloyThe largest fabrication of HASTELLOY C-22 alloy known to-date is shown here being thin- sheet lined for exposure in a utility flue-gasdesulfurization plant. C-22 sheet is stillproviding excellent service after 10 pump, fortified with a C-22 alloysleeve, is still providing excellent serviceafter 9 years in a continuous stainless steelpickling operation. The acid consistsof 2 percent hydrofluoric acid, 20 percenthydrochloric acid, and as much as 40gm/liter of iron, at 170 were so severe in C-stagebleaching operations at one mill that evenC-276 alloy welds were suspect.

8 As apreventive maintenance measure, 3 mmwas ground off each weld and replacedwith a weld deposit of C-22 alloy . Thisphoto, taken 18 months later, shows thewelds virtually unaffected. At this printing, itis still in service after 7 alloy was selected to replace a FRP fanbecause of its durability and corrosion resis-tance. This fan will handle the incineration ofradioactive and hazardous wastes. Typical Applications (continued)ConcentrationTest TemperatureAverage Corrosion Rate Per Year, mils**MediaWeight Percent F( C)C-22 alloyC-276 alloyC-4 alloy625 alloyAcetic Acid99 BoilingNil<1 Nil<1 Ferric Chloride10 Boiling121407325 Formic Acid88 Boiling<1129 Hydrochloric (90) (90)< Acid1200(93)241-238+ 42 g/l Fe2(SO4)35150(66)2532 Hydrochloric Acid5158(70)592634123+ 2% HFHydrofluoric Acid2158(70)9917205158(70)14101516P2O5 (Commercial38185(85)29-1 Grade)44240(116)21100-2352240(116)1133-12P2O5 +38185(85)112-22000 ppm ClP2O5 +38185(85) HFNitric Acid10 Boiling<177<165 Boiling13488821721 Nitric Acid +5140(60)67207204736% HFNitric Acid +5 Boiling12649771325% H2SO4 +4% NaClNitric Acid +5 Boiling<181111% HClNitric Acid +5 Boiling22126< HClNitric Acid + (52)433114>10, HClHASTELLOY C-22 alloy8*Average of 4-10 tests.

9 **To convert mils per year (mpy) to mm per year, divide by AQUEOUS CORROSION DATA*ConcentrationTest TemperatureAverage Corrosion Rate Per Year, mils**MediaWeight Percent F( C)C-22 alloyC-276 alloyC-4 alloy625 alloySulfuric Acid2150(66)Nil<1 NilNil2 Boiling56665174(79)<111<15 Boiling912161610 Boiling1219253720150(66)<1<1<1<120174(79 )1321320 Boiling3339369130150(66)<11<1<130174(79) 3432730 Boiling64557322740100(38)<1<1<1<140150(6 6)<119140174(79)910153550100(38)<1 Nil<1150150(66)14132550174(79)1612255860 100(38)<1<11<170100(38)NilNil2<180100(38 )Nil<1<1<1 Sulfuric Acid + HClSulfuric Acid + HClSulfuric Acid +10158(70)<111241211% HClSulfuric Acid +10194(90)9445663261% HClSulfuric Acid +10 Boiling2251161928691% HClSulfuric Acid +10 Boiling292226552% HFSulfuric Acid +25158(70)111237110200 ppm Cl-Sulfuric Acid +25 Boiling215186182325200 ppm Cl-Sulfuric Acid + HCl +1% FeCl3 +1% CuCl2 Sulfuric Acid + HCl +1% FeCl3 +1% CuCl2 (ASTMG28B)Sulfuric Acid +50 Boiling402501432342 g/lFe2(SO4)3 (ASTMG28A)9 HASTELLOY C-22 alloy *Average of 4-10 tests.

10 **To convert mils per year (mpy) to mm per year, divide by Aqueous Corrosion Data* (continued)Test Temperature,Test Temperature,Hardness,Condition400 F (204 C)450 F (232 C)RockwellMill AnnealedNo cracksNo cracksRB 9020% Cold WorkedNo cracksNo cracksRC 3350% Cold WorkedNo cracksNo cracksRC 43 HASTELLOY C-22 alloy10 The chemical composition of thesolution used in this test is asfollows: 4 percent NaCl + Fe2(SO4)3+ M solution contains 24,300 ppmchlorides and is acidic (pH2).In both pitting and crevice-corrosion testing, the solutiontemperature was varied in5 deg. C increments to deter-mine the lowest temperature atwhich pitting corrosion initiated(observed by examination at amagnification of 40X) after a24-hour exposure period(Critical Pitting Temperature),and the lowest temperature atwhich crevice corrosion initiatedin a 100-hour exposure period(Critical Crevice-CorrosionTemperature). HASTELLOY C-22 alloy >150>302102212 (Boiling) HASTELLOY C-276 alloy15030280176 HASTELLOY C-4 alloy14028450122 HAYNES 625 alloy9019450122 HASTELLOY G-30 alloy7015840104 Allegheny AL-6XN alloy7015845113 Avesta 254 SMO alloy6014040104 FERRALIUM alloy 255501223595 alloy 904L451132068 Type 317LM Stainless Steel35951559 alloy 8252577<5<23 Carpenter 20Cb-3 alloy2568<5<23 Type 316 Stainless Steel2068<5<23 AlloyCritical PittingTemperature C FCritical Crevice-CorrosionTemperature C FThe chemical composition of thesolution used in this test is asfollows: percent H2SO4+ percent HCl+1 percentFeCl3+1 percent CuCl2.


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