Super304H(,,100031)[]Super304H,Super304H,Super304H,[]Super304H:TK223.1+1:B:1000-7229(2003)09-0011-04PropertiesofMaterialSuper304HUsedforESCBoilersSunYezhu(HuanengInternationalPowerLtd.Company,Beijing,100031)[Abstract]AfterdemonstratingthepropertiesofSuper304H,suchaschemicalcompositions,enhancementmechanism,mechani2calproperty,creepfractureproperty,agingproperty,anti-steamoxidizationpropertyandmachiningpropertieslikeweldingandbending,aswellaspracticesinpowerplantsSuper304Hhasbeenprovedapplicableformaterialsoflargecapacity,highparametersESCunits.Whilethematerialisusedforthepreviousunits,thethickness,steelconsumption,structuralbearingweightandthermalstressofthecomponentsscanbereducedandmanufacturecostandconstructiondifficultycanberelaxed.Itprovestobeofgoodeconomy.[Keywords]Super304H;extrasupercritical;boilerpipe;property,,,Super304H1Super304H,Super304H1Super304HSuper304H:C0.07%0.13%;Si0.3%;Mn0.5%;P0.045%;S0.03%;Cr17.0%19.0%;Ni7.5%10.5%;Cu2.5%3.5%;Nb0.3%0.6%;N0.05%0.12%Super304H,CuNb,0.12%Super304H,M23C6,Nb(C,N)NbCrN1Su2per304HNb,Super304HSuper304H,2Super304H2.11Super304H,0.2%18Cr-8Ni,TP347H:2003-06-181124920039ElectricPowerConstructionVol.24No.9Sep,20031Super304H/mmTS/MPaYS/MPaEL/%/HRB(0)/(Jcm-2)A54.08.06543226782.9222B54.08.06112866679.7235:(1):;(2):5mm10mm2mmV1Super304H6002,3,0.2%2.5,6.5600600,Su2per304HTP321HTP347H22.2Super304H410,4:,105hLarson-Miller:Super304H105hTP347H20%,3600452.3500700104h,0,,,,Super304H,,Super304H9%Ni,,Si2.4521242%CSiMnPSNiCrCuMoNbNGTAWTP-304H0.100.233.200.0010.00416.1618.363.040.850.620.20SMAW304H0.110.782.850.0100.00215.3019.002.701.000.730.10:GTAW:;SMAW:Super304HTP347H,TP347HTP321H2.5Nb,Super304H,TP347H3/MPa550/MPaT-304H61845562146362.62.6.1Super304H:Super304HTP347H2.6.2,Super304HSuper304H,2,3;6,2.6.3Super304H(PWHT)Cl-,,PWHT,PWHTPWHT772.6.4Super304HSuper304HT91:ERNiCr3;200300;PWHT73075030min,2.72.7.1Super304H2.5Dr;1.5Dr;1.5Dr2.7.2:,3%;9%,TP347H,2.7.3(1):8Super304H,20%,2.5Dr(20%),,,Cl-,,PWHT(2)11201150,,,3Super304HSuper304H,IHISuper304H4319Super304H84Super304H/mm2593/59324.1MPa27.245.119941600/61025.0MPa45.063.519972600/61025.0MPa45.019981600/60024.5MPa45.050.820001600/61025.0MPa50.870.0IHI20004600/60025.0MPa50.8IHI20001600/60024.5MPa45.063.519952600/60024.5MPa45.019962593/59324.1MPa54.063.519981595/59524.5MPa45.057.020014Super304HSuper304H,,Super304H,,,5Super304H,TP347H,,5:Super304H126%,79%,74%,Super304H,Super304H,,,,()(),5,5Super304H650/MPa/mm/%/%T912950.816.01.3475TP304H4250.812.51.1587TP347H5450.810.3100100Super304H7850.87.679126,,:Super304HTP347HFG;,Super304H,,,Super304H55.1Super304H(0.1C18Cr9Ni3CuNbN),Nb,Su2per304H,,6505.2,:Super304H,5.3Super304H,,Super304H61Takao.etc,PropertiesandexperiencesofanewausteniticstainlesssteelSuper304H(0.1C-18Cr-9Ni-3Cu-Nb-N)forboilertubeappli2cation.Appl.Mech.Eng.,(3)269289,1974.(:)4124