HAYNES 230 ALLOY

1 HIGH-TEMPERATURE ALLOYSHAYNES 230 ALLOYC ontentsPrincipal Features3 Creep and Stress-Rupture Strength4 ASME Vessel Code7 Low Cycle Fatigue8 Tensile Properties9 Thermal Stability10 Resistance To Grain Growth11 Physical Properties12 Oxidation14 Nitriding18 Carburization18 Field Experience20 Hydrogen Embrittlement20 Aqueous Corrosion20 Fabrication22 Microstructure23 Welding24 Health and Safety26 Machining27 Typical Applications2, 17, 19, 21A Ni-Cr-W-Mo ALLOY that com-bines excellent high-temperaturestrength and oxidation resistancewith superior long term stabilityand good 2007, HAYNES International, Lycoming gas turbine engine combustor made of HAYNES 230 acid catalyst grids support made from HAYNES 230 ALLOY plate and bar.

2 Excellent creep strengthat 1700 F (927 C) makes the ALLOY highly suitable for this APPLICATIONS3 PRINCIPAL FEATURESE xcellent High-Tempera-ture Strength, ThermalStability, and Environ-ment ResistanceHAYNES 230 ALLOY is a nickel-chromium-tungsten- molybde -num ALLOY that combinesexcellent high-temperaturestrength, outstanding resis-tance to oxidizing environmentsup to 2100 F (1149 C) forprolonged exposures, premierresistance to nitriding environ-ments, and excellent long-termthermal stability. It is readilyfabricated and formed, and iscastable. Other attractivefeatures include lower thermalexpansion characteristics thanmost high-temperature alloys,and a pronounced resistance tograin coarsening with pro-longed exposure to FabricatedHAYNES 230 ALLOY has excellentforming and welding character-istics.

3 It may be forged orotherwise hot-worked, provid-ing it is held at 2150 F(1177 C) for a time sufficient tobring the entire piece to tem-perature. As a consequence ofits good ductility, 230 ALLOY isalso readily formed by cold-working. All hot- or cold-worked parts should beannealed and rapidly cooled inorder to restore the bestbalance of ALLOY can be welded by avariety of techniques, includinggas tungsten arc (GTAW), gasmetal arc (GMAW), and resis-tance 230 ALLOY is furnishedin the solution heat-treatedcondition, unless otherwisespecified. The ALLOY is solutionheat-treated in the range of2150 to 2275 F (1177 to1246 C) and rapidly cooled orwater-quenched for at temperatureslower than the solution heat-treating temperatures willproduce some carbide precipi-tation in 230 ALLOY , which maymarginally affect the ALLOY sstrength and 230 ALLOY may be castusing traditional air-melt sandmold or vacuum-melt invest-ment casting foundry levels at the high end ofthe specification range arerecommended for enhancedfluidity.

4 Castings may be usedin either the as-cast or solu-tion-heat-treated conditiondepending upon in ConvenientFormsHAYNES 230 ALLOY is producedin the form of plate, sheet,strip, foil, billet, bar, wirewelding products, pipe, tubing,and remelt 230 ALLOY combinesproperties which make it ideallysuited for a wide variety ofcomponent applications in theaerospace and power indus-tries. It is used for combustioncans, transition ducts,flameholders, thermocouplesheaths, and other importantgas turbine components. In thechemical process industry,230 ALLOY is used for catalystgrid supports in ammoniaburners, high-strength thermo-couple protection tubes, high-temperature heat exchangers,ducts, high-temperaturebellows, and various other keyprocess the industrial heating indus-try, applications for 230 alloyinclude furnace retorts, chainsand fixtures, burner flameshrouds, recuperator internals,dampers, nitriding furnaceinternals, heat-treating baskets,grates, trays, sparger tubes,thermocouple protection tubes,cyclone internals, and SpecificationsHAYNES 230 ALLOY is coveredby ASME Section VII, Division , sheet, strip, bar.

5 Forging,tubing, pipe, and fittings arecovered by ASME specifica-tions SB 435, SB 572, SB 564,SB 619, SB 622, SB 626, andSB 366 and ASTM specifica-tions B 435, B 572, B 564, B619, B 622, B 626, and B specifications are 17744No. (all forms) andNiCr22W14Mo (all forms). TheUNS number for the ALLOY isN06230. Sheet, strip and plateare also covered by AMSspecification 5878, while barand forging are covered by AMSspecification Vessel CodeHAYNES 230 ALLOY is coveredby ASME Vessel Code case for Section I and SectionVlll Division 1 construction to1650 F (899 C).NiCrWMoFeCoMnSiAlCLaB57a221423*5* **Maximum aAs balanceNominal Chemical Composition, Weight Percent4 Stress-Rupture Lives for Various Alloys at Fixed Test Conditions (Bar and Plate)*Comparison of Stress to Produce 1% Creep in 1000 Hours (Sheet)Hours to Rupture1400 Ksi1600 Ksi1800 KsiAlloy(760 C/103 MPa)(871 C/31 MPa)(982 C/14 MPa)

6 230 alloy8,20065,0005,000625 alloy19,00014,0002,400X alloy9005,0002,100 ALLOY 800H1301,200920 INCONEL ALLOY 601501,2001,000253 MA alloy140900720 ALLOY 60015280580 Type 316 Stainless Steel100240130RA330 alloy30230130 Type 304 Stainless Steel1010072*Based upon Larson-Miller extrapolationCREEP AND STRESS-RUPTURE STRENGTHHAYNES 230 ALLOY is a solid-solution-strengthened materialwhich combines excellent high-temperature strength with goodfabricability at room tempera-ture. It is particularly effectivefor very long-term applicationsat temperatures of 1200 F(649 C) or more, and is ca-pable of outlasting stainlesssteels and nickel alloys by asmuch as 100 to 1 dependingupon the temperature.

7 Alterna-tively, the higher strength of230 ALLOY allows for the use ofdesign section thicknesses asmuch as 75 percent thinnerthan lesser alloys with no lossin load-bearing - 2250 F (1232 C) Solution AnnealApproximate Initial Stress, Ksi (MPa)Test TemperatureCreep,to Produce Specified Creep in: F( C)Percent10 Hours100 Hours1,000 Hours10,000 Hours*1200(649) (330) (220) (150) (350) (250) (170) (460) (330) (250) (185)1300(704) (215) (145) (100) (235) (165) (115) (325) (235) (170) (130)1400(760) (120) (95) (75) (140) (100) (81) (220) (170) (125) (91)1500(816) (90) (71) (54) (97) (77) (59) (160) (120) (86) (58)1600(871) (69) (52) (38) (76) (58) (40) (115) (83) (57) (39)1700(927) (52) (37) (23) (57) (39) (25) (83) (55) (34) (22)1800(982) (37) (23) (12) (39) (25) (13) (55) (34) (18) ( )1900(1038) (52) (24) (11)----*Significant Extrapolation of DataPlate and Bar - 2250 F (1232 C) Solution AnnealApproximate Initial Stress, Ksi (MPa)

8 Test TemperatureCreep,to Produce Specified Creep in: F( C)Percent10 Hours100 Hours1,000 Hours10,000 Hours*1200(649) (405) (235) (160) (415) (270) (180) (120) (385) (295) (200)1300(704) (205) (140) (105) (240) (160) (125) (85) (360) (270) (200) (145)1400(760) (130) (97) (76) (150) (110) (79) (55) (255) (185) (140) (98)6 Plate and Bar - 2250 F (1232 C) Solution Anneal (con't)Approximate Initial Stress, Ksi (MPa)Test TemperatureCreep,to Produce Specified Creep in: F( C)Percent10 Hours100 Hours1,000 Hours10,000 Hours1500(816) (92) (73) (57) (105) (83) (63) (45) (180) (130) (97) (68)1600(871) (71) (55) (39) (81) (62)6 0(41) (30) (130) (95) (66) (43)1700(927) (54) (38) (23) (61) (43) (28) (18) (92) (65) (41) (24)1800(982) (38) (23) (11) (43) (26) (14) ( ) (65) (41) (21) (11)1900(1038)* (30) (14) ( ) (48) (24) (12)----2000(1093)* (16) ( ) (29) (14) ( )----2100(1149)* ( ) ( ) (16) ( ) ( )----*Based upon limited dataVacuum Investment Casting (As Cast)Approximate Initial Stress, Ksi (MPa)Test Temperatureto Produce Rupture in.

9 F( C)10 Hours100 Hours1,000 Hours10,000 Hours*1400(760) (220) (165) (125) (96)1500(816) (160) (120) (90) (68)1600(871) (115) (86) (64) (46)1700(927) (86) (62) (44) (31)1800(982) (62) (44) (30) (20)1900(1038) (45) (31) (20) (12)2000(1093) (32) (21) (12)----2100(1149) (22) (13) ( )----*Significant Extrapolation of Data7 ASME VESSEL CODE ALLOWABLE STRESSESC omparative Design Strength Values* HAYNES 230 ALLOY is ap-proved for ASME Vessel CodeSection I and Section VlllDivision 1 construction to1650 F (899 C) in Section II,Part D for plate, sheet, strip,bar, and forgings. (See alsoCode Case No. 2063 forSection I, Applications). Allow-able stresses are reprintedhere by permission of (1)Due to the relatively low yield strength of thismaterial, these higher stress values wereestablished at temperatures where the short timetensile properties govern to permit the use of thesealloys where slightly greater deformation isacceptable.

10 These higher stress values exceed67%, but do not exceed 90% of the yield strength attemperature. Use of these stresses may result indimensional changes due to permanent stress values are not recommended forflanges of gasketed joints or other applicationswhere slight amounts of distortion can causeleakage or 230 ALLOY exhibits significantdesign strength advantages over otherASME vessel code covered materials forSection Vlll Division 1 construction attemperatures up to 1650 F (899 C).ASME Vessel Section II, Part D, Table 1 BMetalMaximum Allowable Stress ValuesTemperaturesNot ExceedingStandardNote (1) F *All values taken from ASME Vessel Code Section VIII Division 1 or appropriate Code CYCLE FATIGUE PROPERTIESC omparative Low Cycle Fatigue PropertiesHAYNES 230 ALLOY exhibitsexcellent low cycle fatigueproperties at elevated tempera-ture.