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HAYNES 230 alloyPrincipal FeaturesExcellent High-Temperature Strength, Thermal Stability, and EnvironmentResistanceHAYNES 230 (UNS N06230) alloy is a nickel-chromium-tungsten-molybdenum alloythat combines excellent high-temperature strength, outstanding resistance to oxidizingenvironments up to 2100 F (1149 C) for prolonged exposures, premier resistance tonitriding environments, and excellent long-term thermal stability. It is readily fabricatedand formed, and is castable. Other attractive features include lower thermal expansioncharacteristics than most high-temperature alloys, and a pronounced resistance to graincoarsening with prolonged exposure to high temperatures.Easily FabricatedHAYNES 230 alloy has excellent forming and welding characteristics. It may be forgedor otherwise hot-worked, providing it is held at 2150 F (1177 C) for a time sufficient tobring the entire piece to temperature. As a consequence of its good ductility, 230 alloy isalso readily formed by coldworking. All hot- or coldworked parts should be annealed andrapidly cooled in order to restore the best balance of properties. The alloy can be weldedby a variety of techniques, including gas tungsten arc (GTAW), gas metal arc (GMAW), andresistance welding.Heat-TreatmentWrought 230 alloy is furnished in the solution heat-treated condition, unless otherwisespecified. The alloy is solution heat-treated in the range of 2150 to 2275 F (1177 to1246 C) and rapidly cooled or water-quenched for optimum properties.Annealing at temperatures lower than the solution heat-treating temperatures will producesome carbide precipitation in 230 alloy, which may marginally affect the alloy’s strengthand ductility.CastingsHAYNES 230 alloy may be cast using traditional air-melt sand mold or vacuum-meltinvestment casting foundry practices. Silicon levels at the high end of the specificationrange are recommended for enhanced fluidity. Castings may be used in either the as-castor solution-heat-treated condition depending upon property requirements.H-3000O 2021 Haynes International

Principal Features ContinuedApplicationsHAYNES 230 alloy combines properties which make it ideally suited for a wide variety ofcomponent applications in the aerospace and power industries. It is used for combustioncans, transition ducts, flame holders, thermocouple sheaths, and other important gasturbine components. In the chemical process industry, 230 alloy is used for catalystgrid supports in ammonia burners, high-strength thermocouple protection tubes, hightemperature heat exchangers, ducts, high-temperature bellows, and various other keyprocess internals.In the industrial heating industry, applications for 230 alloy include furnace retorts, chainsand fixtures, burner flame shrouds, recuperator internals, dampers, nitriding furnaceinternals, heat-treating baskets, grates, trays, sparger tubes, thermocouple protectiontubes, cyclone internals, and many more.Nominal CompositionWeight Lanthanum:Boron:57 Balance221423 max.5 max.0.50.40.5 max.0.30.1 max.0.10.020.015 max.Haynes International - HAYNES 230 alloy

Creep and Rupture PropertiesHAYNES 230 alloy is a solid-solution-strengthened material which combines excellenthigh-temperature strength with good fabricability at room temperature. It is particularlyeffective for very long-term applications at temperatures of 1200 F (650 C) or more, and iscapable of outlasting stainless steels and nickel alloys by as much as 100 to 1 dependingupon the temperature. Alternatively, the higher strength of 230 alloy allows for the use ofdesign section thicknesses as much as 75 percent thinner than lesser alloys with no loss inload-bearing capability.Stress-Rupture Lives for Various Alloys at Fixed Test Conditions (Bar and Plate)*Alloy1400 F (760 C)15.0 ksi (103 MPa) 2308,20062519,000X900800H130 INCONEL 60150 253 MA14060015316 SS100 RA33030304 SS10*Based upon Larson-Miller extrapolationHours to Rupture1600 F (871 C)4.1 ksi (31 Mpa)65,00014,0005,0001,2001,2009002802402301001800 F (982 C)2.0 ksi (14 n of Stress to Produce 1% Creep in 1000 Hours (Sheet)Haynes International - HAYNES 230 alloy

Creep and Rupture Properties Continued230 Sheet, Solution AnnealedTemperature F CCreep%0.51200 6491R0.51300† 7041R0.51400 7601R0.51500 8161R0.51600 8711R0.51700 9271R0.51800 9821R0.51900 10381R0.52000 10931R*Significant ExtrapolationApproximate Initial Stress to Produce Specified Creep in10 Hours100 Hours1,000 Hours 10,000 6.2-Haynes International - HAYNES 230 alloy

Creep and Rupture Properties Continued230 Plate, Solution AnnealedTemperature F 190010382000109321001149Approximate Initial Stress to Produce Specified Creep in10 Hours100 Hours1,000 Hours 10,000 ignificant ExtrapolationHaynes International - HAYNES 230 alloy

Low Cycle FatigueHAYNES 230 alloy exhibits excellent low cycle fatigue properties at elevatedtemperature. Results shown below are for strain-controlled tests run in the temperaturerange from 800 to 1800 F (425 to 980 C). Samples were machined from plate. Tests wererun with fully reversed strain (R -1) at a frequency of 20 cpm (0.33 Hz).Comparative Low Cycle Fatigue PropertiesThe graph below compares the low cycle fatigue lives of a number of alloys tested at800 F (427 C) in both the as-received and 1400 F (760 C)/1000 hour pre-exposed condition. Samples were machined from plate or bar, after exposure for exposed samples.Tests were again run with fully reversed strain (R -1) at a frequency of 20 cpm (0.33 Hz).TSR Total Strain Range.800 F (425 C) LCF Life for Various AlloysCompilation of axial LCF test results (R -1, f 0.33 Hz)Temperature F C800427* Indicates a run-out.Δεtot/%1.501.000.800.650.55Ni, Cycles to Initiation2230848014,91845,127103,910Haynes International - HAYNES 230 alloyNf, Cycles to Failure2398874216,57546,523115,456

Low Cycle Fatigue ContinuedTemperatureCompilation of axial LCF test results (R -1, f 0.33 Hz)Δεtot/%Ni, Cycles to InitiationNf, Cycles to Failure F es International - HAYNES 230 alloy

Tensile PropertiesTensile Properties of 230 SheetTestTemperature F 2% 223617.812310.069Ultimate .254.137.0Tensile Properties of 230 PlateTestTemperature F 2% 923416.81169.163Ultimate 345.131124.316813.291RT Room TemperatureComparison of Yield Strengths (Plate)Haynes International - HAYNES 230 alloyElongation%46.053.253.068.094.091.292.1

Thermal StabilityHAYNES 230 alloy exhibits excellent retained ductility after long-term thermal exposureat intermediate temperatures. It does not exhibit sigma phase, mu phase, or otherdeleterious phase formation even after 16,000 hours of exposure at temperatures from1200 to 1600 F (649 to 871 C). Principal phases precipitated from solid solution are allcarbides.This contrasts markedly with many other solid-solution-strengthened superalloys suchas HAYNES 188 alloy, HAYNES 625 alloy, and HASTELLOY X alloy. These alloys allprecipitate deleterious phases, which impair both tensile ductility and impact strength.Haynes International - HAYNES 230 alloy

Thermal Stability ContinuedRoom-Temperature Properties after Thermal ExposureConditionMA 1200/8,000 hr. 1200/20,000 hr. 1200/30,000 hr. 1200/50,000 hr.0.2% YieldStrengthksi123.1128.0128.4129.9131.7Ultimate Tensile 61.233.9R.A. 1400/8,000 hr 1400/20,000 hr 1400/30,000 hr 1400/50,000 34.331.633.932.518.718.8 1600/8,000 hr. 1600/20,000 hr. 1600/30,000 hr. 1600/50,000 actStrengthft-lb5431.428.925.820.714.8*BIGM; AGL Elong, which tends to be lower; Other data are 4D Elong.R.A. Reduction of AreaRetained Room Temperature Tensile Ductility after 8000 HourExposure at TemperatureExposureTemperature F120014001600Room Temperature Room TemperatureTensile Elongation Tensile Elongation230 188%36.43236.2%29.110.822.2Room TemperatureTensile Elongation625Room TemperatureTensile ElongationX%181326%191930Haynes International - HAYNES 230 alloy

Resistance to Grain GrowthHAYNES 230 alloy exhibits excellent resistance to grain growth at high temperatures. As aconsequence of its very stable primary carbides, 230 alloy can be exposed at temperatures ashigh as 2200 F (1204 C) for up to 24 hours without exhibiting significant grain growth. Materialssuch as HAYNES 188 alloy or HASTELLOY X alloy exhibit greater grain growth under suchconditions, as would most iron-, nickel-, or cobalt-base alloys and stainless steels.ExposureTimeh01424Grain Size for Alloys Exposed at Temperature for Various Times*(ASTM Grain Size No.)2150 F(1177 C)2200 F (1204 C) 230188X4-4 1/24 - 4 1/24-54-53 1/23 1/24-54 - 4 1/22-52.43 1/20-14 - 4 1/24 - 4 1/23 1/233 1/20-144 - 4 1/20-21-300-40-1 1/2*Plate ProductHaynes International - HAYNES 230 alloy

Physical PropertiesPhysical PropertyBritish UnitsMetric Units3DensityRT0.324 lb/inRT8.97 g/cm3Melting Temperature 2375-2500 F1301-1371 CRT49.2 µohm-inRT C125.0 µohm-m200 F49.5 µohm-in100 C125.8 µohm-m400 F49.8 µohm-in200 C126.5 µohm-m600 F50.2 µohm-in300 C127.3 µohm-m800 F50.7 µohm-in400 C128.4 µohm-mElectrical Resistivity1000 F51.5 µohm-in500 C130.2 µohm-m1200 F51.6 µohm-in600 C131.2 µohm-m1400 F51.1 µohm-in700 C130.7 µohm-m1600 F50.3 µohm-in800 C129.1 µohm-m1800 F49.3 µohm-in900 C127.1 µohm-m1000 C125.0 µohm-mRT3.8 x 10-3in2/secRT24.2 x 10-3cm2/s200 F4.1 x 10-3in2/sec100 C26.8 x 10-3cm2/s400 F4.7 x 10-3in2/sec200 C29.9 x 10-3cm2/s600 F5.2 x 10-3in2/sec300 C32.9 x 10-3cm2/s800 F5.6 x 10-3in2/sec400 C35.7 x 10-3cm2/sThermal Diffusivity1000 F6.1 x 10-3in2/sec500 C38.5 x 10-3cm2/s1200 F6.5 x 10-3in2/sec600 C41.9 x 10-3cm2/s1400 F6.7 x 10-3in2/sec700 C43.0 x 10-3cm2/s1600 F6.7 x 10-3in2/sec800 C43.2 x 10-3cm2/s1800 F7.3 x 10-3in2/sec900 C44.4 x 10-3cm2/s1000 C48.2 x 10-3cm2/sRT62 Btu-in/ft2-hr- FRT8.9 W/m- C2200 F71 Btu-in/ft -hr- F100 C10.4 W/m- C400 F87 Btu-in/ft2-hr- F200 C12.4 W/m- C2600 F102 Btu-in/ft -hr- F300 C14.4 W/m- C2800 F118 Btu-in/ft -hr- F400 C16.4 W/m- CThermal1000 F133 Btu-in/ft2-hr- F500 C18.4 W/m- CConductivity21200 F148 Btu-in/ft -hr- F600 C20.4 W/m- C21400 F164 Btu-in/ft -hr- F700 C22.4 W/m- C1600 F179 Btu-in/ft2-hr- F800 C24.4 W/m- C21800 F195 Btu-in/ft -hr- F900 C26.4 W/m- C1000 C28.4 W/m- CRT Room TemperatureHaynes International - HAYNES 230 alloy

Physical Properties ContinuedPhysical PropertyBritish UnitsRT0.095 Btu/lb- F200 F0.099 Btu/lb- F400 F0.104 Btu/lb- F600 F0.108 Btu/lb- F800 F0.112 Btu/lb- F1000 F0.112 Btu/lb- F1200 F0.134 Btu/lb- F1400 F0.140 Btu/lb- F1600 F0.145 Btu/lb- F1800 F0.147 Btu/lb- F70-200 F6.5 µin/in - F70-400 F6.9 µin/in - F70-600 F7.2 µin/in - F70-800 F7.4 µin/in - F70-1000 F7.6 µin/in - F70-1200 F8.0 µin/in - F70-1400 F8.3 µin/in - F70-1600 F8.6 µin/in - F70-1800 F8.9 µin/in - FRT30.3 x 106 psi200 F30.1 x 106 psi400 F29.0 x 106 psi600 F27.8 x 106 psi800 F26.8 x 106 psi1000 F25.9 x 106 psi1200 F24.9 x 106 psi1400 F23.6 x 106 psi1600 F22.2 x 106 psi1800 F20.7 x 106 psi2000ºF19.1 x 106 psiSpecific HeatMean Coefficient ofThermal ExpansionDynamic Modulusof ElasticityMetric UnitsRT397 J/kg· C100 C419 J/kg· C200 C435 J/kg· C300 C448 J/kg· C400 C465 J/kg· C500 C473 J/kg· C600 C486 J/kg· C700 C574 J/kg· C800 C5595 J/kg· C900 C609 J/kg· C1000 C617 J/kg· C25-100 C11.8 x 10-6m/m· C25-200 C12.4 x 10-6m/m· C25-300 C12.8 x 10-6m/m· C25-400 C13.2 x 10-6m/m· C25-500 C13.6 x 10-6m/m· C25-600 C14.1 x 10-6m/m· C25-700 C14.7 x 10-6m/m· C25-800 C15.2 x 10-6m/m· C25-9