A313A313M

StandardSpecificationfor

StainlessSteelSpringWire1ThisstandardisissuedunderthefixeddesignationA313/A313M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.

1.Scope*

1.1Thisspecificationcoversausteniticandage-hardenablestainlesssteelroundspringwireintendedespeciallyforthemanufactureofsprings.

1.2Thevaluesstatedininch-poundunitsorSIunitsaretoberegardedseparatelyasthestandard.Withinthetextandtables,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththespecification.

1.3Unlesstheorderspecifiesan“M”designation,thematerialshallbefurnishedtoinch-poundunits.

2.ReferencedDocuments2.1ASTMStandards:

A555/A555MSpecificationforGeneralRequirementsforStainlessSteelWireandWireRods2A751TestMethods,Practices,andTerminologyforChemicalAnalysisofSteelProducts2E527PracticeforNumberingMetalsandAlloys(UNS)32.2SocietyofAutomotiveEngineersStandard:J1086NumberingMetalsandAlloys43.OrderingInformation

3.1Itistheresponsibilityofthepurchasertospecifyallrequirementsthatarenecessaryformaterialorderedunderthisspecification.Suchrequirementsmayinclude,butarenotlimitedtothefollowing:3.1.1Quantity(weight),

3.1.2Nameofmaterial(stainlesssteelspringwire),3.1.3Finish(see8.1),

3.1.4Dimension(diameter),

ThisspecificationisunderthejurisdictionofASTMCommitteeA01onSteel,StainlessSteelandRelatedAlloys,andisthedirectresponsibilityofSubcommitteeA01.17onFlat-RolledandStainlessSteel.

CurrenteditionapprovedMay10,2003.PublishedJune2003.Originallyapprovedin1947.Lastpreviouseditionapprovedin1998asA313/A313M–98.2AnnualBookofASTMStandards,Vol01.03.3AnnualBookofASTMStandards,Vol01.01.4AvailablefromSocietyofAutomotiveEngineers(SAE),400CommonwealthDr.,Warrendale,PA15096.

13.1.5Typedesignation(Table1),

3.1.6ASTMdesignationanddateofissue,

3.1.7Supplementaryrequirementsforgovernmentprocure-ment,and

3.1.8Specialrequirements.

NOTE1—Atypicalorderingdescriptionisasfollows:

2000lb(1000kg)StainlessSteelSpringWire,cold-drawnClass1,brightfinish,0.032-in.(0.82mm)diameter,in100-lb(50kg)16-in.(0.4m)coils,Type302toASTMA313,dated____.

4.GeneralRequirementsforDelivery

4.1Inadditiontotherequirementsofthisspecification,allrequirementsofthecurrenteditionofSpecificationA555/A555Mshallapply.FailuretocomplywiththegeneralrequirementsofSpecificationA555/A555Mconstitutesnon-conformancewiththisspecification.

5.Manufacture

5.1Types302Class1,304,305,316,321,347,andGradesS20430andXM-28shallbecolddrawntoproducetherequiredmechanicalproperties.

5.2Type631,Type302Class2,andGradeXM-16shallbefurnishedinthecold-drawnconditionreadyforfabrication.FollowingfabricationType631andGradeXM-16shallbeageorprecipitationhardenedtoproducetheirmaximumstrengthproperties.ThetensilestrengthstobeobtainedfollowingtheprescribedheattreatmentareshowninTable2andTable3forhardenedwire.Type302Class2shallbestressrelievedfollowingfabricationandmeettherequirementsshowninTable4.Thenominalas-drawntensilestrengthsareprovidedasaguideforthespringmanufacturer.

6.ChemicalComposition

6.1ThesteelshallconformtotherequirementsastochemicalcompositionprescribedinTable1.

6.2MethodsandpracticesrelatingtochemicalanalysisrequiredbythisspecificationshallbeinaccordancewithTestMethods,Practices,andTerminologyA751.7.MechanicalRequirements7.1TensileProperties:

*ASummaryofChangessectionappearsattheendofthisstandard.

Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.

1

TABLE1ChemicalRequirements

UNSDesig-nationAType

Carbon

Manganese

Phosphorus

Sulfur

Silicon

Composition,B%Chromium

Nickel

Molybdenum

Nitrogen

OtherElements

AusteniticGrades

SSSSSSS24100302003040030500316003210034700

XM-28302304305316321347

0.150.120.080.120.070.080.08

11.0–14.02.002.002.002.002.002.00

0.0600.0450.0450.0450.0450.0450.045

0.0300.0300.0300.0300.0300.0300.030

1.001.001.001.001.001.001.00

16.5–19.017.0–19.018.0–20.017.0–19.016.5–18.017.0–19.017.0–19.0

0.50–2.508.0–10.08.0–10.510.5–13.010.5–13.59.0–12.09.0–13.0

0.20–0.450.100.10

2.00–2.50

0.10

Ti53Cmin

(Cb+Ta)103Cmin

Age-HardenableGrades

S17700S45500

631XM-16

0.090.05

1.000.50

0.0400.040

0.0300.030

1.000.50

16.0–18.011.0–12.5

6.50–7.87.50–9.5

0.50max

Al0.75–1.50Ti0.80–1.40Cu1.50–2.50(Cb+Ta)0.10–0.50

Cu2.0–4.0

S20430

AB...0.156.5–9.00.0600.0301.0015.5–17.51.50–3.500.05–0.25

NewdesignationsestablishedinaccordancewithPracticeE527andSAEJ1086,PracticeforNumberingMetalsandAlloys(UNS).Maximumunlessrangeisshown.

TABLE2TensileStrengthRequirementsforType631ADiameter,in.[mm]

ColdDrawnCondition

C,ksi[MPa]Nominal

295290285275270265257255245242238236230228226224222218213207203

[2035][2000][1965][1895][1860][1825][1770][1760][1690][1670][1640][1625][1585][1570][1560][1545][1530][1505][1470][1425][1400]

335330325320310305297292282279274272260258256254252248242235230

ConditionCH-900B,ksi[MPa]min[2310][2275][2240][2205][2135][2100][2050][2015][1945][1925][1890][1875][1795][1780][1765][1750][1740][1710][1670][1620][1585]

365360355350340335327322312309304302290288286284282278272265260

max[2515][2480][2450][2415][2345][2310][2255][2220][2150][2130][2095][2080][2000][1985][1970][1960][1945][1915][1875][1825][1795]

0.010[0.25]to0.015[0.38],incl

Over0.015[0.38]to0.020[0.51],inclOver0.020[0.51]to0.029[0.74],inclOver0.029[0.74]to0.041[1.04],inclOver0.041[1.04]to0.051[1.30],inclOver0.051[1.30]to0.061[1.55],inclOver0.061[1.55]to0.071[1.80],inclOver0.071[1.80]to0.086[2.18],inclOver0.086[2.18]to0.090[2.29],inclOver0.090[2.29]to0.100[2.54],inclOver0.100[2.54]to0.106[2.69],inclOver0.106[2.69]to0.130[3.30],inclOver0.130[3.30]to0.138[3.50],inclOver0.138[3.50]to0.146[3.71],inclOver0.146[3.71]to0.162[4.11],inclOver0.162[4.11]to0.180[4.57],inclOver0.180[4.57]to0.207[5.26],inclOver0.207[5.26]to0.225[5.72],inclOver0.225[5.72]to0.306[7.77],inclOver0.306[7.77]to0.440[11.2],inclOver0.440[11.2]to0.625[15.88],incl

ABWhenwireisspecifiedinstraightenedandcutlengths,theminimumtensilestrengthshallbe90%ofthevalueslistedinthetable.Agedat900°F[482°C]for1handaircooled.

7.1.1Types302Class1and304shallconformtotherequirementsshowninTable5.

7.1.2Types305,316,321,and347shallconformtotherequirementsshowninTable6.

7.1.3Type631shallconformtotherequirementsshowninTable2whenheattreated900°F[482°C]for1handaircooled.7.1.4GradeXM-16shallconformtotherequirementsshowninTable3whenheattreated850°F[454°C]for1⁄2handaircooled.

7.1.5GradeXM-28shallconformtotherequirementsshowninTable7.

7.1.6Type302Class2shallconformtotherequirementsshowninTable4.

7.1.7GradeS20430shallconformtotherequirementsshowninTable8.7.2WrapTest:7.2.1Wire0.162in.[4.11mm]andsmallerindiametershallwindonitselfasanarborwithoutbreaking.

7.2.2Wirelargerthan0.162in.[4.11mm]indiametershallwindwithoutbreakingonamandrelhavingadiametertwicethediameterofthewire.7.3Uniformity(CoilTest):

7.3.1Intheas-colddrawncondition,aspecimencoilshallbewoundonanarborofthesizespecifiedinTable9toformatightlywoundcoil.

7.3.2Afterwinding,thespecimencoilshallbestretchedtoapermanentsetfourtimesitsas-woundlength.Afterthistreatment,thespecimencoilshallshowuniformpitchwithnosplitsorfractures.

7.4Cast—Alooporringshallbecutfromthebundleandallowedtofallonthefloor.Thewireshalllieflatandnotspringuporshowawavycondition.

TABLE3TensileStrengthRequirementsforGradeXM-16ADiameter,in.[mm]

ColdDrawn,ksi[MPa]

Nominal

245235225220215210200195190180

[1690][1620][1550][1515][1480][1450][1380][1345][1310][1240]

320310305295290285278272265260

AgeHardenedB,ksi[MPa]min[2205][2135][2100][2035][2000][1965][1915][1875][1825][1795]

350340335325320315308302295290

max[2415][2345][2310][2240][2205][2170][2125][2080][2035][2000]

0.010[0.25]to0.040[1.02],incl

Over0.040[1.02]to0.050[1.27],inclOver0.050[1.27]to0.060[1.52],inclOver0.060[1.52]to0.075[1.90],inclOver0.075[1.90]to0.085[2.16],inclOver0.085[2.16]to0.095[2.41],inclOver0.095[2.41]to0.110[2.79],inclOver0.110[2.79]to0.125[3.17],inclOver0.125[3.17]to0.150[3.81],inclOver0.150[3.81]to0.500[12.7],incl

ABWhenwireisstraightenedandcutlengths,theminimumtensilestrengthshallbe90%ofthevalueslistedinthetable.Agedat850°F[454°C]for1⁄2handaircooled.

TABLE4TensileStrengthRequirementforType302Class2

ksi[MPa]

Diameter,in.[mm]

ColdDrawnNominal290[2000]

StressRelievedAmin290[2000]

max340[2345]

0.050[1.30]to0.160[4.00],incl

Aexceeding50bendsperminute,andinnocaseshallthespeedbesogreatastocauseundueheatingofthewire.Thetestspecimenshallbebentbackandforththroughatotalangleof180°untilfailureoccurs.Each90°movementineitherdirectionshallbecountedasonebend.ThewireshallwithstandtheminimumnumberofbendsspecifiedinTable5andTable6.

8.Finish

8.1Stainlesssteelspringwireissuppliedwithdifferenttypesoffinishsuchasbright,copper,lead,oxide,andother.9.Keywords

9.1austeniticstainlesssteel;precipitationhardeningstain-lesssteel;stainlesssteelspringwire

Stressrelievedat800to850°F[430to455°C]for1⁄2handaircooled.

7.5BendTest—Whenspecifiedinthepurchaseorder,Types302,304,305,316,321,and347shallbetestedbythebendtest.Apiecenotmorethan10in.[254mm]longshallbeselectedfromeachtestsample.ThesespecimensshallbetestedinabendingmachineconformingsubstantiallytoFig.1.Bendsshallbemadeatasnearlyauniformrateaspossible,not

TABLE5TensileStrengthRequirementsforTypes302Class1and304ADiameter,in.[mm]

Upto0.009[0.23],incl

Over0.009[0.23]to0.010[0.25],inclOver0.010[0.25]to0.011[0.28],inclOver0.011[0.28]to0.012[0.30],inclOver0.012[0.30]to0.013[0.33],inclOver0.013[0.33]to0.014[0.36],inclOver0.014[0.36]to0.015[0.38],inclOver0.015[0.38]to0.016[0.41],inclOver0.016[0.41]to0.017[0.43],inclOver0.017[0.43]to0.018[0.46],inclOver0.018[0.46]to0.020[0.51],inclOver0.020[0.51]to0.022[0.56],inclOver0.022[0.56]to0.024[0.61],inclOver0.024[0.61]to0.026[0.66],inclOver0.026[0.66]to0.028[0.71],inclOver0.028[0.71]to0.031[0.79],inclOver0.031[0.79]to0.034[0.86],inclOver0.034[0.86]to0.037[0.94],inclOver0.037[0.94]to0.041[1.04],inclOver0.041[1.04]to0.045[1.14],inclOver0.045[1.14]to0.050[1.27],inclOver0.050[1.27]to0.054[1.37],inclOver0.054[1.37]to0.058[1.47],inclOver0.058[1.47]to0.063[1.60],inclOver0.063[1.60]to0.070[1.78],inclOver0.070[1.78]to0.075[1.90],inclOver0.075[1.90]to0.080[2.03],inclOver0.080[2.03]to0.087[2.21],inclOver0.087[2.21]to0.095[2.41],inclOver0.095[2.41]to0.105[2.67],inclOver0.105[2.67]to0.115[2.92],inclOver0.115[2.92]to0.125[3.17],inclOver0.125[3.17]to0.135[3.43],inclOver0.135[3.43]to0.148[3.76],inclOver0.148[3.76]to0.162[4.11],inclOver0.162[4.11]to0.177[4.50],inclOver0.177[4.50]to0.192[4.88],inclOver0.192[4.88]to0.207[5.26],inclOver0.207[5.26]to0.225[5.72],inclOver0.225[5.72]to0.250[6.35],inclOver0.250[6.35]to0.278[7.06],inclOver0.278[7.06]to0.306[7.77],inclOver0.306[7.77]to0.331[8.41],inclOver0.331[8.41]to0.362[9.19],inclOver0.362[9.19]to0.394[10.00],inclOver0.394[10.00]to0.438[11.12],inclOver0.438[11.12]to0.500[12.70],inclOver0.500[12.70]

ABendTestMinimumNumberof

Bends

.......................................8888888887777777555333311111111111

325320318316314312310308306304300296292291289285282280275272267265261258252250246242238232227222217210205198194188182175168161155150145140135130

ksi[MPa]

min[2240][2205][2190][2180][2165][2150][2135][2125][2110][2095][2070][2040][2015][2005][1995][1965][1945][1930][1895][1875][1840][1825][1800][1780][1735][1725][1695][1670][1640][1600][1565][1530][1495][1450][1415][1365][1335][1295][1255][1205][1160][1110][1070][1035][1000][965][930][895]

355350348346344342340338336334330326322320318315310308304300295293289285281278275271268262257253248241235228225220214205198192186180175170165160

max[2450][2415][2400][2385][2370][2360][2345][2330][2315][2300][2275][2250][2220][2205][2190][2170][2135][2125][2095][2070][2035][2020][1990][1965][1935][1915][1895][1870][1850][1805][1770][1745][1710][1660][1620][1570][1550][1515][1475][1415][1365][1325][1280][1240][1205][1170][1140][1105]

Whenwireisspecifiedinstraightenedandcutlengths,theminimumtensilestrengthshallbe90%ofthevalueslistedinthetable.

TABLE6TensileStrengthRequirementsforTypes305,316,321,and347ADiameter,in.[mm]

BendTestMinimumNumberof

Bends

.........88877775533311111

245240235235230225220215210205200195185180170160155150140135130125

ksi[MPa]

min[1690][1655][1620][1620][1585][1550][1515][1480][1450][1415][1380][1345][1275][1240][1170][1105][1070][1035][965][930][895][860]

275270265265260255250245240235230225215210200190185180170165160155

max[1895][1860][1825][1825][1790][1760][1725][1690][1655][1620][1585][1550][1480][1450][1380][1310][1275][1240][1170][1140][1105][1070]

Upto0.010[0.25],inclOver0.010[0.25]to0.015Over0.015[0.38]to0.024Over0.024[0.61]to0.041Over0.041[1.04]to0.047Over0.047[1.19]to0.054Over0.054[1.37]to0.062Over0.062[1.57]to0.072Over0.072[1.82]to0.080Over0.080[2.03]to0.092Over0.092[2.34]to0.105Over0.105[2.67]to0.120Over0.120[3.05]to0.148Over0.148[3.76]to0.166Over0.166[4.22]to0.177Over0.177[4.50]to0.207Over0.207[5.26]to0.225Over0.225[5.72]to0.250Over0.250[6.35]to0.312Over0.312[7.92]to0.375Over0.375[9.53]to0.500Over0.500[12.70]

A[0.38],incl[0.61],incl[1.04],incl[1.19],incl[1.37],incl[1.57],incl[1.83],incl[2.03],incl[2.34],incl[2.67],incl[3.05],incl[3.76],incl[4.22],incl[4.50],incl[5.26],incl[5.72],incl[6.35],incl[7.92],incl[9.53],incl[12.70],incl

Whenwireisspecifiedinstraightenedandcutlengths,theminimumtensilestrengthshallbe90%ofthevalueslistedinthetable.

TABLE7TensileStrengthRequirementsforGradeXM-28ADiameter,in.[mm]

min

Upto0.009[0.23],incl

Over0.009[0.23]to0.010[0.25],inclOver0.010[0.25]to0.011[0.28],inclOver0.011[0.28]to0.012[0.30],inclOver0.012[0.30]to0.013[0.33],inclOver0.013[0.33]to0.014[0.36],inclOver0.014[0.36]to0.015[0.38],inclOver0.015[0.38]to0.016[0.41],inclOver0.016[0.41]to0.017[0.43],inclOver0.017[0.43]to0.018[0.46],inclOver0.018[0.46]to0.020[0.51],inclOver0.020[0.51]to0.022[0.56],inclOver0.022[0.56]to0.024[0.61],inclOver0.024[0.61]to0.026[0.66],inclOver0.026[0.66]to0.028[0.71],inclOver0.028[0.71]to0.032[0.81],inclOver0.032[0.81]to0.037[0.94],inclOver0.037[0.94]to0.041[1.04],inclOver0.041[1.04]to0.047[1.19],inclOver0.047[1.19]to0.054[1.37],inclOver0.054[1.37]to0.087[2.21],inclOver0.087[2.21]to0.120[3.05],inclOver0.120[3.05]to0.166[4.22],inclOver0.166[4.22]to0.192[4.88],inclOver0.192[4.88]to0.225[5.72],inclOver0.225[5.72]to0.278[7.06],inclOver0.278[7.06]to0.331[8.41],inclOver0.331[8.41]to0.394[10.00],inclOver0.394[10.00]to0.500[12.70],incl

ATABLE8TensileStrengthRequirementforGradeS20430

Diameter,in.[mm]

ksi[MPa]

min230[1585]215[1480]

max260[1795]245[1690]

ksi[MPa]

max355350348346344342340338336334330326322319316312307303300295290285280270260245230215190

[2450][2415][2400][2385][2370][2360][2345][2330][2315][2305][2275][2250][2220][2200][2180][2150][2120][2090][2070][2035][2000][1965][1930][1860][1795][1690][1585][1480][1310]

325320318316314312310308306304300296292289286282277273270265260255250240230215200185160[2240][2205][2195][2180][2165][2150][2135][2125][2110][2095][2070][2040][2015][1995][1970][1945][1910][1880][1860][1825][1795][1760][1725][1655][1585][1480][1380][1275][1105]

Over0.080[2.03]to0.095[2.41],incl

Over0.095[2.41]to0.105[2.67],incl

TABLE9ArborDiameterSizeforUniformityTest

WireDiameter,in.[mm]0.034[0.85]andunderOver0.034[0.85]to0.045Over0.045[1.20]to0.055Over0.055[1.40]to0.125Over0.125[3.20]to0.180

[1.20],[1.40],[3.20],[4.60],

inclinclinclincl

ArborDiameter,in.[mm]

0.1020.1450.2120.2500.350

[2.60][3.70][5.40][6.40][9.00]

Whenwireisspecifiedinstraightenedandcutlengths,theminimumtensilestrengthshallbe85%ofthevalueslistedinthetable.

DiameterofWire,in.[mm]Over0.026to0.105[0.65to2.70],inclOver0.105to0.162[2.70to4.10],inclOver0.162to0.180[4.10to4.60],incl

ClearanceC60.005,in.[mm]

0.688[17.50]0.813[20.50]0.938[24.00]

FIG.1SchematicArrangementofBendingMachine

SUPPLEMENTARYREQUIREMENTS

Unlessotherwisespecifiedinthepurchaseorder,thefollowingsupplementaryrequirementsshallapplywhenthisspecificationisusedingovernmentprocurementofType631springwireuptoandincluding0.162in.[4.11mm]indiameter.

S1.WrappingTest

S.1.1Awirespecimenshallbewrappedfivecompleteturnsaroundamandrelequaltothediameterofthewirewithoutanysurfacebreaksorcracksoccurringinthewire.Onespecimenshallbetakenfromeverytencoilsinthelot.

S2.SurfaceExamination

S2.1Awirespecimenshallbeetchedelectrolyticallyina75%phosphoricacidsolutionwithacurrentdensityof1A/in2.

forasufficienttimetoremoveupto1%ofthediameter.Afteretchingthesurfaceofthewirespecimenitshallbeexaminedundera10powermicroscopeforsplits,seams,pits,diemarks,scratches,orotherimperfectionstendingtoimpairthefatigueresistanceofsprings.Appropriatehighermagnificationshouldbeusedforsizesbelow0.125in.[3.17mm].Lubricatingcoatings,whichareinsolubleinacidetchsolution,shallberemovedbeforeetching.

SUMMARYOFCHANGES

CommitteeA01hasidentifiedthelocationofselectedchangesmadetothisstandardsincethelastissue(A313/A313M-98)thatmayimpacttheuseofthisstandard(approvedMay10,2003).

(1)ThecompositionofS30200wasrevisedinTable1.

ASTMInternationaltakesnopositionrespectingthevalidityofanypatentrightsassertedinconnectionwithanyitemmentionedinthisstandard.Usersofthisstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtheriskofinfringementofsuchrights,areentirelytheirownresponsibility.Thisstandardissubjecttorevisionatanytimebytheresponsibletechnicalcommitteeandmustbereviewedeveryfiveyearsandifnotrevised,eitherreapprovedorwithdrawn.YourcommentsareinvitedeitherforrevisionofthisstandardorforadditionalstandardsandshouldbeaddressedtoASTMInternationalHeadquarters.Yourcommentswillreceivecarefulconsiderationatameetingoftheresponsibletechnicalcommittee,whichyoumayattend.IfyoufeelthatyourcommentshavenotreceivedafairhearingyoushouldmakeyourviewsknowntotheASTMCommitteeonStandards,attheaddressshownbelow.ThisstandardiscopyrightedbyASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.Individualreprints(singleormultiplecopies)ofthisstandardmaybeobtainedbycontactingASTMattheaboveaddressorat610-832-9585(phone),610-832-9555(fax),orservice@astm.org(e-mail);orthroughtheASTMwebsite(www.astm.org).