钢管标准ASTM A276-2008
TABLE2Continued
DiameterorThickness,
in.(mm)
TensileStrength,minksi
414414S41425S41500420S42010431
440A,440B,and440C
ATTTAAAA
hot- nishedorcold- nishedhot- nishedorcold- nishedhot- nishedhot- nishedorcold- nishedhot- nishedcold- nishedhot- nishedcold- nishedhot- nishedorcold- nishedhot- nishedcold- nished
allallallallallallallallallallall
...115120115...............
MPa...790825795...............
YieldStrength,A
minksi...909590...............
MPa...620655620...............
Elonga-tionin2in.(50mm)B
or4Dmin%
...151515...............
Reduc-tionofArea,C,Dmin,%...454545.....................
BrinellHard-ness,Emax298...321295241255235255285269285
TypeConditionFinish
......
TABLE3ResponsetoHeatTreatment
Type
A
fx
HeatTreatmentTemperatureB°F(°C),min175017501750182518501875187518751875
(955)(955)(955)(995)(1010)(1020)(1020)(1020)(1020)
AirAirOilAirOilOilAirOilAir
w.bz
403410414420S42010431440A440B440C
A
Samplesfortestingshallbeintheformofasectionnotexceeding3 8in.(9.50mm)inthickness.B
Temperaturetoleranceis625°F
(14°C).
ww
10.Keywords
10.1austeniticstainlesssteel;austenitic-ferriticduplexstainlesssteel;ferriticstainlesssteel;martensiticstainlesssteel;stainlesssteelbars;stainlesssteelshapes
w.
Quenchant
HardnessHRC,min
353542504840555658
Yieldstrengthshallbedeterminedbythe0.2%offsetmethodinaccordancewithTestMethodsandDe nitionsA370.Analternativemethodofdeterminingyieldstrengthmaybeusedbasedonatotalextensionunderloadof0.5%.B
Forsomespeci cproducts,itmaynotbepracticabletousea2-in.or50-mmgagelength.Theuseofsub-sizetestspecimens,whennecessary,ispermissibleinaccordancewithTestMethodsandDe nitionsA370.C
Reductionofareadoesnotapplyon atbars3 16in.(4.76mm)andunderinthicknessasthisdeterminationisnotgenerallymadeinthisproductsize.D
Thematerialshallbecapableofmeetingtherequiredreductionofareawherelisted,butactualmeasurementandreportingofthereductionofareaarenotrequiredunlessspeci edinthepurchaseorder.E
OrequivalentRockwellhardness.F
ForextrudedshapesofallCr-NigradesofConditionA,theyieldstrengthshallbe25ksi(170MPa)minandtensilestrengthshallbe70ksi(480MPa)min.G
Forshapeshavingsectionthicknessof1 2in.(12.5mm)orless,30%min.elongationisacceptable.H
MaterialshallbecapableofbeingheattreatedtoamaximumBrinellhardnessof250whenoilquenchedfrom1750°F(953°C).
A
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