Steel - Wikipedia, The Free Encyclopedia

5/23/2015 SteelWikipedia,thefreeencyclopedia

http://en.wikipedia.org/wiki/Steel 1/17

Thesteelcableofacollierywindingtower

SteelFromWikipedia,thefreeencyclopedia

Steelsarealloysofironandcarbon,widelyusedinconstructionandotherapplicationsbecauseoftheirhightensilestrengthsandlowcosts.Carbon,otherelements,andinclusionswithinironactashardeningagentsthatpreventthemovementofdislocationsthatotherwiseoccurinthecrystallatticesofironatoms.

Thecarbonintypicalsteelalloysmaycontributeupto2.1%ofitsweight.Varyingtheamountofalloyingelements,theirformationinthesteeleitherassoluteelements,orasprecipitatedphases,retardsthemovementofthosedislocationsthatmakeironsoductileandweak,andthuscontrolsqualitiessuchasthehardness,ductility,andtensilestrengthoftheresultingsteel.Steel'sstrengthcomparedtopureironisonlypossibleattheexpenseofductility,ofwhichironhasanexcess.

Althoughsteelhadbeenproducedinbloomeryfurnacesforthousandsofyears,steel'suseexpandedextensivelyaftermoreefficientproductionmethodsweredevisedinthe17thcenturyforblistersteelandthencruciblesteel.WiththeinventionoftheBessemerprocessinthemid19thcentury,aneweraofmassproducedsteelbegan.ThiswasfollowedbySiemensMartinprocessandthenGilchristThomasprocessthatrefinedthequalityofsteel.Withtheirintroductions,mildsteelreplacedwroughtiron.

Furtherrefinementsintheprocess,suchasbasicoxygensteelmaking(BOS),largelyreplacedearliermethodsbyfurtherloweringthecostofproductionandincreasingthequalityofthemetal.Today,steelisoneofthemostcommonmaterialsintheworld,withmorethan1.3billiontonsbeingproducedannually.Itisamajorcomponentinbuildings,infrastructure,tools,ships,automobiles,machines,appliances,andweapons.Modernsteelisgenerallyidentifiedbyvariousgradesdefinedbyassortedstandardsorganizations.

Contents

1Definitionsandrelatedmaterials2Materialproperties

2.1Heattreatment3Steelproduction4Historyofsteelmaking

4.1Ancientsteel4.2WootzsteelandDamascussteel4.3Modernsteelmaking

4.3.1Processesstartingfrombariron4.3.2Processesstartingfrompigiron



4.3.2Processesstartingfrompigiron5Steelindustry6Recycling7Contemporarysteel

7.1Carbonsteels7.2Alloysteels7.3Standards

8Uses8.1Historical8.2Longsteel8.3Flatcarbonsteel8.4Stainlesssteel8.5Lowbackgroundsteel

9Seealso10References

10.1Bibliography11Furtherreading12Externallinks

Definitionsandrelatedmaterials

Thecarboncontentofsteelisbetween0.002%and2.1%byweightforplainironcarbonalloys.Thesevaluesvarydependingonalloyingelementssuchasmanganese,chromium,nickel,iron,tungsten,carbonandsoon.Basically,steelisanironcarbonalloythatdoesnotundergoeutecticreaction.Incontrast,castirondoesundergoeutecticreaction.Toolittlecarboncontentleaves(pure)ironquitesoft,ductile,andweak.Carboncontentshigherthanthoseofsteelmakeanalloycommonlycalledpigironthatisbrittleandnotmalleable.Alloysteelissteeltowhichalloyingelementshavebeenintentionallyaddedtomodifythecharacteristicsofsteel.Commonalloyingelementsinclude:manganese,nickel,chromium,molybdenum,boron,titanium,vanadium,andniobium.[1]Additionalelementsmaybepresentinsteel:manganese,phosphorus,sulfur,silicon,andtracesofoxygen,nitrogen,andcopper.

Alloyswithahigherthan2.1%carboncontent,dependingonotherelementcontentandpossiblyonprocessing,areknownascastiron.Castironisnotmalleableevenwhenhot,butitcanbeformedbycastingasithasalowermeltingpointthansteelandgoodcastabilityproperties.[1]Steelisalsodistinguishablefromwroughtiron(nowlargelyobsolete),whichmaycontainasmallamountofcarbonbutlargeamountsofslag.Notethatthepercentagesofcarbonandotherelementsquotedareonaweightbasis.

Materialproperties

IroniscommonlyfoundintheEarth'scrustintheformofanore,usuallyanironoxide,suchasmagnetite,hematiteetc.Ironisextractedfromironorebyremovingtheoxygenthroughcombinationwithapreferredchemicalpartnersuchascarbonthatislosttotheatmosphereascarbondioxide.Thisprocess,knownassmelting,wasfirstappliedtometalswithlowermeltingpoints,suchastin,whichmeltsatapproximately250C(482F)andcopper,whichmeltsatapproximately1,100C(2,010F).Incomparison,castironmeltsatapproximately1,375C(2,507F).[2]Smallquantitiesofironweresmeltedinancienttimes,inthe



Ironcarbonphasediagram,showingtheconditionsnecessarytoformdifferentphases

solidstate,byheatingtheoreburiedinacharcoalfireandweldingthemetaltogetherwithahammer,squeezingouttheimpurities.Withcare,thecarboncontentcouldbecontrolledbymovingitaroundinthefire.

AllofthesetemperaturescouldbereachedwithancientmethodsthathavebeenusedsincetheBronzeAge.Sincetheoxidationrateofironincreasesrapidlybeyond800C(1,470F),itisimportantthatsmeltingtakeplaceinalowoxygenenvironment.Unlikecopperandtin,liquidorsolidirondissolvescarbonquitereadily.Smeltingresultsinanalloy(pigiron)thatcontainstoomuchcarbontobecalledsteel.[2]Theexcesscarbonandotherimpuritiesareremovedinasubsequentstep.

Othermaterialsareoftenaddedtotheiron/carbonmixturetoproducesteelwithdesiredproperties.Nickelandmanganeseinsteeladdtoitstensilestrengthandmaketheausteniteformoftheironcarbonsolutionmorestable,chromiumincreaseshardnessandmeltingtemperature,andvanadiumalsoincreaseshardnesswhilemakingitlesspronetometalfatigue.[3]

Toinhibitcorrosion,atleast11%chromiumisaddedtosteelsothatahardoxideformsonthemetalsurfacethisisknownasstainlesssteel.Tungsteninterfereswiththeformationofcementite,allowingmartensitetopreferentiallyformatslowerquenchrates,resultinginhighspeedsteel.Ontheotherhand,sulfur,nitrogen,andphosphorusmakesteelmorebrittle,sothesecommonlyfoundelementsmustberemovedfromthesteelmeltduringprocessing.[3]

Thedensityofsteelvariesbasedonthealloyingconstituentsbutusuallyrangesbetween7,750and8,050kg/dm3(484,000and503,000lb/cuft),or7.75and8.05g/cm3(4.48and4.65oz/cuin).[4]

Eveninanarrowrangeofconcentrationsofmixturesofcarbonandironthatmakeasteel,anumberofdifferentmetallurgicalstructures,withverydifferentpropertiescanform.Understandingsuchpropertiesisessentialtomakingqualitysteel.Atroomtemperature,themoststableformofpureironisthebodycenteredcubic(BCC)structurecalledferriteoriron.Itisafairlysoftmetalthatcandissolveonlyasmallconcentrationofcarbon,nomorethan0.005%at0C(32F)and0.021wt%at723C(1,333F).At910Cpureirontransformsintoafacecenteredcubic(FCC)structure,calledausteniteoriron.TheFCCstructureofaustenitecandissolveconsiderablymorecarbon,asmuchas2.1%[5](38timesthatofferrite)carbonat1,148C(2,098F),whichreflectstheuppercarboncontentofsteel,beyondwhichiscastiron.[6]



Whensteelswithlessthan0.8%carbon(knownasahypoeutectoidsteel),arecooled,theausteniticphase(FCC)ofthemixtureattemptstoreverttotheferritephase(BCC).ThecarbonnolongerfitswithintheFCCstructure,resultinginanexcessofcarbon.Onewayforcarbontoleavetheausteniteisforittoprecipitateoutofsolutionascementite,leavingbehindasurroundingphaseofBCCironthatislowenoughincarbontotaketheformofferrite,resultinginaferritematrixwithcementiteinclusions.CementiteisahardandbrittleintermetalliccompoundwiththechemicalformulaofFe3C.Attheeutectoid,0.8%carbon,thecooledstructuretakestheformofpearlite,namedforitsresemblancetomotherofpearl.Onalargerscale,itappearsasalamellarstructureofferriteandcementite.Forsteelsthathavemorethan0.8%carbon,thecooledstructuretakestheformofpearliteandcementite.[7]

Perhapsthemostimportantpolymorphicformofsteelismartensite,ametastablephasethatissignificantlystrongerthanothersteelphases.Whenthesteelisinanausteniticphaseandthenquenchedrapidly,itformsintomartensite,astheatoms"freeze"inplacewhenthecellstructurechangesfromFCCtoadistortedformofBCCastheatomsdonothavetimeenoughtomigrateandformthecementitecompound.Dependingonthecarboncontent,themartensiticphasetakesdifferentforms.Belowapproximately0.2%carbon,ittakesanferriteBCCcrystalform,butathighercarboncontentittakesabodycenteredtetragonal(BCT)structure.Thereisnothermalactivationenergyforthetransformationfromaustenitetomartensite.Moreover,thereisnocompositionalchangesotheatomsgenerallyretaintheirsameneighbors.[8]

Martensitehasalowerdensitythandoesaustenite,sothatthetransformationbetweenthemresultsinachangeofvolume.Inthiscase,expansionoccurs.Internalstressesfromthisexpansiongenerallytaketheformofcompressiononthecrystalsofmartensiteandtensionontheremainingferrite,withafairamountofshearonbothconstituents.Ifquenchingisdoneimproperly,theinternalstressescancauseaparttoshatterasitcools.Attheveryleast,theycauseinternalworkhardeningandothermicroscopicimperfections.Itiscommonforquenchcrackstoformwhensteeliswaterquenched,althoughtheymaynotalwaysbevisible.[9]

Heattreatment

Therearemanytypesofheattreatingprocessesavailabletosteel.Themostcommonareannealing,quenching,andtempering.Annealingistheprocessofheatingthesteeltoasufficientlyhightemperaturetosoftenit.Thisprocessgoesthroughthreephases:recovery,recrystallization,andgraingrowth.Thetemperaturerequiredtoannealsteeldependsonthetypeofannealingtobeachievedandtheconstituentsofthealloy.[10]

Quenchingandtemperingfirstinvolvesheatingthesteeltotheaustenitephasethenquenchingitinwateroroil.Thisrapidcoolingresultsinahardbutbrittlemartensiticstructure.[8]Thesteelisthentempered,whichisjustaspecializedtypeofannealing,toreducebrittleness.Inthisapplicationtheannealing(tempering)processtransformssomeofthemartensiteintocementite,orspheroiditeandhencereducestheinternalstressesanddefects.Theresultisamoreductileandfractureresistantsteel.[11]

Steelproduction

Whenironissmeltedfromitsore,itcontainsmorecarbonthanisdesirable.Tobecomesteel,itmustbereprocessedtoreducethecarbontothecorrectamount,atwhichpointotherelementscanbeadded.Inmodernfacilities,thisliquidisthencontinuouslycastintolongslabsorcastintoingots.Approximately



Ironorepelletsfortheproductionofsteel

BloomerysmeltingduringtheMiddleAges

96%ofsteeliscontinuouslycast,whileonly4%isproducedasingots.[12]

Theingotsarethenheatedinasoakingpitandhotrolledintoslabs,blooms,orbillets.Slabsarehotorcoldrolledintosheetmetalorplates.Billetsarehotorcoldrolledintobars,rods,andwire.Bloomsarehotorcoldrolledintostructuralsteel,suchasIbeamsandrails.Inmodernsteelmillstheseprocessesoftenoccurinoneassemblyline,withorecominginandfinishedsteelcomingout.[13]Sometimesafterasteel'sfinalrollingitisheattreatedforstrength,howeverthisisrelativelyrare.[14]

Historyofsteelmaking

Ancientsteel

Steelwasknowninantiquity,andmayhavebeenproducedbymanagingbloomeriesandcrucibles,orironsmeltingfacilities,inwhichtheycontainedcarbon.[15][16][17]

TheearliestknownproductionofsteelarepiecesofironwareexcavatedfromanarchaeologicalsiteinAnatolia(KamanKalehoyuk)andarenearly4,000yearsold,datingfrom1800BC.[18][19]HoraceidentifiessteelweaponslikethefalcataintheIberianPeninsula,whileNoricsteelwasusedbytheRomanmilitary.[20]

SouthIndianandMediterraneansourcesincludingAlexandertheGreat(3rdc.BC)recountthepresentationandexporttotheGreeksof100talentsofSouthIndiansteel.ThereputationofSericironofSouthIndia(wootzsteel)amongsttheGreeks,Romans,Egyptians,EastAfricans,ChineseandtheMiddleEastgrewconsiderably,ahighqualityhighcarbonironandsteelimportedfromTamilpeopleofthedynastyChera.[17]MetalproductionsitesinSriLankautilizedthesenoveltechniquesusinguniquewindfurnacesdrivenbythemonsoonwinds,capableofproducinghighcarbonsteel,aswellasimportedartefactsofancientironandsteelfromKodumanal.LargescaleWootzsteelproductioninTamilakamusingcruciblestheyinventedandcarbonsourcessuchastheplantAvramoccurredbythesixthcenturyBC,thepioneeringprecursortomodernsteelproductionandmetallurgy.[16][17]

SteelwasproducedinlargequantitiesinSpartaaround650BC.[21][22]

TheChineseoftheWarringStatesperiod(403221BC)hadquenchhardenedsteel,[23]whileChineseoftheHandynasty(202BC220AD)createdsteelbymeltingtogetherwroughtironwithcastiron,gaininganultimateproductofacarbonintermediatesteelbythe1stcenturyAD.[24][25]TheHayapeopleofEast



Africainventedatypeoffurnacetheyusedtomakecarbonsteelat1,802C(3,276F)nearly2,000yearsago.EastAfricansteelhasbeensuggestedbyRichardHookertodatebackto1400BC.[26][27]

WootzsteelandDamascussteel

EvidenceoftheearliestproductionofhighcarbonsteelintheIndianSubcontinentarefoundinKodumanalinTamilNaduarea,GolcondainAndhraPradeshareaandKarnataka,andinSamanalawewaareasofSriLanka.[28]ThiscametobeknownasWootzsteel,producedinSouthIndiabyaboutsixthcenturyBCandexportedglobally.[29][30]Thesteeltechnologyexistedpriorto326BCintheregionastheyarementionedinliteratureofSangamTamil,ArabicandLatinasthefineststeelintheworldexportedtotheRomans,Egyptian,ChineseandArabsworldsatthattimewhattheycalledSericIron.[31]A200BCTamiltradeguildinTissamaharama,intheSouthEastofSriLanka,broughtwiththemsomeoftheoldestironandsteelartefactsandproductionprocessestotheislandfromtheclassicalperiod.[32][33][34][35]TheChineseandlocalsinAnuradhapura,SriLankahadalsoadoptedtheproductionmethodsofcreatingWootzsteelfromtheCheraDynastyTamilsofSouthIndiabythe5thcenturyAD.[36][37]InSriLanka,thisearlysteelmakingmethodemployedauniquewindfurnace,drivenbythemonsoonwinds,capableofproducinghighcarbonsteel.[38][39]SincethetechnologywasacquiredfromtheTamiliansfromSouthIndia,theoriginofsteeltechnologyinIndiacanbeconservativelyestimatedat400500BC.[29][39]

Wootz,alsoknownasDamascussteel,isfamousforitsdurabilityandabilitytoholdanedge.Itwasoriginallycreatedfromanumberofdifferentmaterialsincludingvarioustraceelements,apparentlyultimatelyfromthewritingsofZosimosofPanopolis.However,thesteelwasanoldtechnologyinIndiawhenKingPoruspresentedasteelswordtotheEmperorAlexanderin326BC.Itwasessentiallyacomplicatedalloywithironasitsmaincomponent.Recentstudieshavesuggestedthatcarbonnanotubeswereincludedinitsstructure,whichmightexplainsomeofitslegendaryqualities,thoughgiventhetechnologyofthattime,suchqualitieswereproducedbychanceratherthanbydesign.[40]Naturalwindwasusedwherethesoilcontainingironwasheatedbytheuseofwood.TheancientSinhalesemanagedtoextractatonofsteelforevery2tonsofsoil,[38]aremarkablefeatatthetime.OnesuchfurnacewasfoundinSamanalawewaandarchaeologistswereabletoproducesteelastheancientsdid.[38][41]

Cruciblesteel,formedbyslowlyheatingandcoolingpureironandcarbon(typicallyintheformofcharcoal)inacrucible,wasproducedinMervbythe9thto10thcenturyAD.[30]Inthe11thcentury,thereisevidenceoftheproductionofsteelinSongChinausingtwotechniques:a"berganesque"methodthatproducedinferior,inhomogeneous,steel,andaprecursortothemodernBessemerprocessthatusedpartialdecarbonizationviarepeatedforgingunderacoldblast.[42]

Modernsteelmaking

Sincethe17thcenturythefirststepinEuropeansteelproductionhasbeenthesmeltingofironoreintopigironinablastfurnace.[43]Originallyemployingcharcoal,modernmethodsusecoke,whichhasprovenmoreeconomical.[44][45][46]

Processesstartingfrombariron



ABessemerconverterinSheffield,England

ASiemensMartinsteelovenfromtheBrandenburgMuseumofIndustry.

Intheseprocessespigironwas"fined"inafineryforgetoproducebariron,whichwasthenusedinsteelmaking.[43]

TheproductionofsteelbythecementationprocesswasdescribedinatreatisepublishedinPraguein1574andwasinuseinNurembergfrom1601.AsimilarprocessforcasehardeningarmourandfileswasdescribedinabookpublishedinNaplesin1589.TheprocesswasintroducedtoEnglandinabout1614andusedtoproducesuchsteelbySirBasilBrookeatCoalbrookdaleduringthe1610s.[47]

Therawmaterialforthisprocesswerebarsofiron.Duringthe17thcenturyitwasrealizedthatthebeststeelcamefromoregroundsironofaregionnorthofStockholm,Sweden.Thiswasstilltheusualrawmaterialsourceinthe19thcentury,almostaslongastheprocesswasused.[48][49]

Cruciblesteelissteelthathasbeenmeltedinacrucibleratherthanhavingbeenforged,withtheresultthatitismorehomogeneous.Mostpreviousfurnacescouldnotreachhighenoughtemperaturestomeltthesteel.TheearlymoderncruciblesteelindustryresultedfromtheinventionofBenjaminHuntsmaninthe1740s.Blistersteel(madeasabove)wasmeltedinacrucibleorinafurnace,andcast(usually)intoingots.[49][50]

Processesstartingfrompigiron

ThemodernerainsteelmakingbeganwiththeintroductionofHenryBessemer'sBessemerprocessin1855,therawmaterialforwhichwaspigiron.[51]Hismethodlethimproducesteelinlargequantitiescheaply,thusmildsteelcametobeusedformostpurposesforwhichwroughtironwasformerlyused.[52]TheGilchristThomasprocess(orbasicBessemerprocess)wasanimprovementtotheBessemerprocess,madebyliningtheconverterwithabasicmaterialtoremovephosphorus.

Another19thcenturysteelmakingprocesswastheSiemensMartinprocess,whichcomplementedtheBessemerprocess.[49]Itconsistedofcomeltingbariron(orsteelscrap)withpigiron.

ThesemethodsofsteelproductionwererenderedobsoletebytheLinzDonawitzprocessofbasicoxygensteelmaking(BOS),developedinthe1950s,andotheroxygensteelmakingmethods.Basicoxygensteelmakingissuperiortoprevioussteelmakingmethodsbecausetheoxygenpumpedintothefurnacelimitsimpuritiesthatpreviouslyhadenteredfromtheairused.[53]Today,electricarcfurnaces(EAF)areacommonmethodofreprocessingscrapmetaltocreatenewsteel.Theycanalsobeusedforconvertingpigirontosteel,buttheyusealotofelectricalenergy(about440kWhpermetricton),andarethusgenerallyonlyeconomicalwhenthereisaplentifulsupplyofcheapelectricity.[54]

Steelindustry



Whitehotsteelpouringoutofanelectricarcfurnace.

Steelproductionbycountryin2007

Itiscommontodaytotalkabout"theironandsteelindustry"asifitwereasingleentity,buthistoricallytheywereseparateproducts.Thesteelindustryisoftenconsideredanindicatorofeconomicprogress,becauseofthecriticalroleplayedbysteelininfrastructuralandoveralleconomicdevelopment.[55]

In1980,thereweremorethan500,000U.S.steelworkers.By2000,thenumberofsteelworkersfellto224,000.[56]

TheeconomicboominChinaandIndiahascausedamassiveincreaseinthedemandforsteelinrecentyears.Between2000and2005,worldsteeldemandincreasedby6%.Since2000,severalIndian[57]andChinesesteelfirmshaverisentoprominencelikeTataSteel(whichboughtCorusGroupin2007),ShanghaiBaosteelGroupCorporationandShagangGroup.ArcelorMittalishowevertheworld'slargeststeelproducer.

In2005,theBritishGeologicalSurveystatedChinawasthetopsteelproducerwithaboutonethirdoftheworldshareJapan,Russia,andtheUSfollowedrespectively.[58]

In2008,steelbegantradingasacommodityontheLondonMetalExchange.Attheendof2008,thesteelindustryfacedasharpdownturnthatledtomanycutbacks.[59]

Theworldsteelindustrypeakedin2007.Thatyear,ThyssenKruppspent$12billiontobuildthetwomostmodernmillsintheworld,inCalvert,AlabamaandSepetiba,RiodeJaneiro,Brazil.TheworldwideGreatRecessionstartingin2008,however,sharplylowereddemandandnewconstruction,andsopricesfell.ThyssenKrupplost$11billiononitstwonewplants,whichsoldsteelbelowthecostofproduction.Finallyin2013,ThyssenKruppofferedtheplantsforsaleatunder$4billion.[60]

Recycling



AsteelplantintheUnitedKingdom.

BethlehemSteelinBethlehem,Pennsylvaniawasoneoftheworld'slargestmanufacturersofsteelbeforeits2003closureandlaterconversionintoacasino.

Steelisoneoftheworld'smostrecycledmaterials,witharecyclingrateofover60%globally[61]intheUnitedStatesalone,over82,000,000metrictons(81,000,000longtons)wasrecycledintheyear2008,foranoverallrecyclingrateof83%.[62]

Contemporarysteel

Carbonsteels

Modernsteelsaremadewithvaryingcombinationsofalloymetalstofulfillmanypurposes.[3]Carbonsteel,composedsimplyofironandcarbon,accountsfor90%ofsteelproduction.[1]Lowalloysteelisalloyedwithotherelements,usuallymolybdenum,manganese,chromium,ornickel,inamountsofupto10%byweighttoimprovethehardenabilityofthicksections.[1]Highstrengthlowalloysteelhassmalladditions(usually



Arollofsteelwool

Somemoremodernsteelsincludetoolsteels,whicharealloyedwithlargeamountsoftungstenandcobaltorotherelementstomaximizesolutionhardening.Thisalsoallowstheuseofprecipitationhardeningandimprovesthealloy'stemperatureresistance.[1]Toolsteelisgenerallyusedinaxes,drills,andotherdevicesthatneedasharp,longlastingcuttingedge.OtherspecialpurposealloysincludeweatheringsteelssuchasCorten,whichweatherbyacquiringastable,rustedsurface,andsocanbeusedunpainted.[69]Maragingsteelisalloyedwithnickelandotherelements,butunlikemoststeelcontainslittlecarbon0.01%).Thiscreatesaverystrongbutstillmalleablesteel.[70]

Eglinsteelusesacombinationofoveradozendifferentelementsinvaryingamountstocreatearelativelylowcoststeelforuseinbunkerbusterweapons.Hadfieldsteel(afterSirRobertHadfield)ormanganesesteelcontains1214%manganesewhichwhenabradedstrainhardenstoformanincrediblyhardskinwhichresistswearing.Examplesincludetanktracks,bulldozerbladeedgesandcuttingbladesonthejawsoflife.[71]

In2015abreakthroughincreatingastronglightaluminiumsteelalloywhichmightbesuitableinapplicationssuchasaircraftwasannouncedbyresearchersatPohangUniversityofScienceandTechnology.AddingsmallamountsofnickelwasfoundtoresultinprecipitationasnanoparticlesofbrittleB2intermetalliccompoundswhichhadpreviouslyresultedinweakness.TheresultwasacheapstronglightsteelalloywhichisslatedfortrialproductionatindustrialscalebyPOSCO,aKoreansteelmaker.[72][73]

Standards

Mostofthemorecommonlyusedsteelalloysarecategorizedintovariousgradesbystandardsorganizations.Forexample,theSocietyofAutomotiveEngineershasaseriesofgradesdefiningmanytypesofsteel.[74]TheAmericanSocietyforTestingandMaterialshasaseparatesetofstandards,whichdefinealloyssuchasA36steel,themostcommonlyusedstructuralsteelintheUnitedStates.[75]

Uses

Ironandsteelareusedwidelyintheconstructionofroads,railways,otherinfrastructure,appliances,andbuildings.Mostlargemodernstructures,suchasstadiumsandskyscrapers,bridges,andairports,aresupportedbyasteelskeleton.Eventhosewithaconcretestructureemploysteelforreinforcing.Inaddition,itseeswidespreaduseinmajorappliancesandcars.Despitegrowthinusageofaluminium,itisstillthemainmaterialforcarbodies.Steelisusedinavarietyofotherconstructionmaterials,suchasbolts,nails,andscrewsandotherhouseholdproductsandcookingutensils.[76]

Othercommonapplicationsincludeshipbuilding,pipelines,mining,offshoreconstruction,aerospace,whitegoods(e.g.washingmachines),heavyequipmentsuchasbulldozers,officefurniture,steelwool,tools,andarmourintheformofpersonalvestsorvehiclearmour(betterknownasrolledhomogeneousarmourinthisrole).

Historical



Acarbonsteelknife

Asteelbridge

Asteelpylonsuspendingoverheadpowerlines

BeforetheintroductionoftheBessemerprocessandothermodernproductiontechniques,steelwasexpensiveandwasonlyusedwherenocheaperalternativeexisted,particularlyforthecuttingedgeofknives,razors,swords,andotheritemswhereahard,sharpedgewasneeded.Itwasalsousedforsprings,includingthoseusedinclocksandwatches.[49]

Withtheadventofspeedierandthriftierproductionmethods,steelhasbecomeeasiertoobtainandmuchcheaper.Ithasreplacedwroughtironforamultitudeofpurposes.However,theavailabilityofplasticsinthelatterpartofthe20thcenturyallowedthesematerialstoreplacesteelinsomeapplicationsduetotheirlowerfabricationcostandweight.[77]Carbonfiberisreplacingsteelinsomecostinsensitiveapplicationssuchasaircraft,sportsequipmentandhighendautomobiles.

Longsteel

AsreinforcingbarsandmeshinreinforcedconcreteRailroadtracksStructuralsteelinmodernbuildingsandbridgesWiresInputtoreforgingapplications

Flatcarbonsteel

MajorappliancesMagneticcoresTheinsideandoutsidebodyofautomobiles,trains,andships.

Stainlesssteel

CutleryRulersSurgicalinstrumentsWatchesGunsRailpassengervehicles

Lowbackgroundsteel

SteelmanufacturedafterWorldWarIIbecamecontaminatedwithradionuclidesduetonuclearweaponstesting.Lowbackgroundsteel,steelmanufacturedpriorto1945,isusedforcertainradiationsensitiveapplicationssuchasGeigercountersandradiationshielding.



Astainlesssteelgravyboat

Seealso

CarbonsteelGlobalsteelindustrytrendsIroninfolkloreKnifemetalMachinabilityPelletizingRolling

RollingmillRustBeltSecondindustrialrevolutionSiliconsteel

SteelabrasiveSteelmillGalvanisingDamascussteelWootzsteelTamahagane,usedinSamuraiswords.Tinplate

References

1. Ashby,MichaelF.andJones,DavidR.H.(1992)[1986].EngineeringMaterials2(withcorrectionsed.).Oxford:PergamonPress.ISBN0080325327.

2. Smelting.EncyclopdiaBritannica.2007.3. "AlloyingofSteels"(http://materialsengineer.com/EAlloyingSteels.htm).MetallurgicalConsultants.200606

28.Retrieved20070228.4. Elert,Glenn."DensityofSteel"(http://hypertextbook.com/facts/2004/KarenSutherland.shtml).Retrieved

20090423.5. Sourcesdifferonthisvaluesoithasbeenroundedto2.1%,howevertheexactvalueisratheracademicbecause

plaincarbonsteelisveryrarelymadewiththislevelofcarbon.See:Smith&Hashemi2006,p.3632.08%.Degarmo,Black&Kohser2003,p.752.11%.Ashby&Jones19922.14%.

6. Smith&Hashemi2006,p.363.7. Smith&Hashemi2006,pp.365372.8. Smith&Hashemi2006,pp.373378.9. "Quenchhardeningofsteel"(http://steel.keytometals.com/default.aspx?ID=CheckArticle&NM=12).Retrieved

20090719.10. Smith&Hashemi2006,p.249.11. Smith&Hashemi2006,p.388.12. Smith&Hashemi2006,p.36113. Smith&Hashemi2006,pp.361362.14. Bugayevetal.Savin,p.22515. Wagner,DonaldB."EarlyironinChina,Korea,andJapan"

(http://www.staff.hum.ku.dk/dbwagner/KoreanFe/KoreanFe.html).Retrieved20070228.



(http://www.staff.hum.ku.dk/dbwagner/KoreanFe/KoreanFe.html).Retrieved20070228.16. HildaEllisDavidson.TheSwordinAngloSaxonEngland:ItsArchaeologyandLiterature.pp.2017. S.SrinivasanS.Ranganathan."WootzSteel:anadvancedmaterialoftheancientworld"

(http://materials.iisc.ernet.in/~wootz/heritage/WOOTZ.htm).Bangalore:DepartmentofMetallurgy,IndianInstituteofScience.

18. Akanuma,H.(2005)."ThesignificanceofthecompositionofexcavatedironfragmentstakenfromStratumIIIatthesiteofKamanKalehyk,Turkey".AnatolianArchaeologicalStudies14:147158.

19. "IronwarepieceunearthedfromTurkeyfoundtobeoldeststeel"(http://www.hindu.com/thehindu/holnus/001200903261611.htm).TheHindu(Chennai,India).20090326.Retrieved20090327.

20. "Noricusensis,"Horace,Odes,i.16.921. "SteelSecretofSpartansWellKept"(http://news.google.com/newspapers?

nid=1314&dat=19611012&id=HzRWAAAAIBAJ&sjid=yecDAAAAIBAJ&pg=5413,4078390).22. "LyleBorst,89,NuclearPhysicistWhoWorkedonABombProject"

(http://www.nytimes.com/2002/08/12/nyregion/lyleborst89nuclearphysicistwhoworkedonabombproject.html).

23. Wagner,DonaldB.(1993).IronandSteelinAncientChina:SecondImpression,WithCorrections.Leiden:E.J.Brill.p.243.ISBN9004096329.

24. Needham,Joseph(1986).ScienceandCivilizationinChina:Volume4,Part3,CivilEngineeringandNautics.Taipei:CavesBooks,Ltd.p.563.

25. Gernet,69.26. "CivilizationsinAfrica:TheIronAgeSouthoftheSahara"

(https://web.archive.org/web/20070619033436/http://www.wsu.edu/~dee/CIVAFRCA/IRONAGE.HTM).WashingtonStateUniversity.Archivedfromtheoriginal(http://www.wsu.edu/~dee/CIVAFRCA/IRONAGE.HTM)on20070619.Retrieved20070814.

27. Africa'sAncientSteelmakers(http://www.time.com/time/magazine/article/0,9171,912179,00.html?promoid=googlep).TimeMagazine,Sept.25,1978.

28. Wilford,JohnNoble(19960206)."AncientSmelterUsedWindToMakeHighGradeSteel"(http://www.nytimes.com/1996/02/06/science/ancientsmelterusedwindtomakehighgradesteel.html?n=Top%2FNews%2FScience%2FTopics%2FArchaeology%20and%20Anthropology).TheNewYorkTimes.

29. SharadaSrinivasanSrinivasaRanganathan(2004).India'sLegendaryWootzSteel:AnAdvancedMaterialoftheAncientWorld(http://materials.iisc.ernet.in/~wootz/heritage/WOOTZ.htm).NationalInstituteofAdvancedStudies.OCLC82439861(https://www.worldcat.org/oclc/82439861).

30. AnnFeuerbach,'Aninvestigationofthevariedtechnologyfoundinswords,sabresandbladesfromtheRussianNorthernCaucasus'IAMS25for2005,pp.2743(p.29)(https://www.es.ucl.ac.uk/iams/jour_25/iams25_Feuerbach.pdf)

31. SharadaSrinivasan(1994)."Wootzcruciblesteel:anewlydiscoveredproductionsiteinSouthIndia".PapersfromtheInstituteofArchaeology5:4959.doi:10.5334/pia.60(https://dx.doi.org/10.5334%2Fpia.60).

32. HobbiesVolume68,Issue5Page45.LghtnerPublishingCompany(1963)33. Mahathevan,Iravatham(24June2010)."AnepigraphicperspectiveontheantiquityofTamil"

(http://www.hindu.com/2010/06/24/stories/2010062451701100.htm).TheHindu(TheHinduGroup).Retrieved31October2010.

34. Ragupathy,P(28June2010)."TissamaharamapotsherdevidencesordinaryearlyTamilsamongpopulation"(http://www.tamilnet.com/art.html?catid=79&artid=32303).Tamilnet(Tamilnet).Retrieved31October2010.

35. http://www.archaeology.lk/http:/www.archaeology.lk/wpcontent/uploads/2011/02/DinithiVolume1Issue4.pdf36. Needham,Volume4,Part1,p.282.37. Manning,CharlotteSpeir."AncientandMedivalIndia.Volume2"(http://books.google.com/books?

id=nmESJR3a0RYC&pg=PA365).ISBN9780543929433.38. Juleff,G.(1996)."AnancientwindpoweredironsmeltingtechnologyinSriLanka".Nature379(3):6063.

Bibcode:1996Natur.379...60J(http://adsabs.harvard.edu/abs/1996Natur.379...60J).doi:10.1038/379060a0(https://dx.doi.org/10.1038%2F379060a0).

39. HerbertHeneryCoghlan.(1977).NotesonprehistoricandearlyironintheOldWorld.pp9910040. Sanderson,Katharine(20061115)."Sharpestcutfromnanotubesword".Newsnature(Nature).

doi:10.1038/news06111311(https://dx.doi.org/10.1038%2Fnews06111311).41. Wayman,MLandJuleff,G(1999)."CrucibleSteelmakinginSriLanka".HistoricalMetallurgy33(1):26.



41. Wayman,MLandJuleff,G(1999)."CrucibleSteelmakinginSriLanka".HistoricalMetallurgy33(1):26.42. Hartwell,Robert(966)."Markets,TechnologyandtheStructureofEnterpriseintheDevelopmentoftheEleventh

CenturyChineseIronandSteelIndustry".JournalofEconomicHistory26:5354.43. Tylecote,R.F.Ahistoryofmetallurgy2edn,InstituteofMaterials,London1992,pp.9599and102105.44. Raistrick,A.ADynastyofIronfounders(1953York1989)45. Hyde,C.K.TechnologicalChangeandtheBritishironindustry(Princeton1977)46. Trinder,B.TheIndustrialRevolutioninShropshire(Chichester2000)47. Barraclough,K.C.SteelbeforeBessemer:IBlisterSteel:thebirthofanindustry(TheMetalsSociety,London,

1984),pp.4852.48. King,P.W.(2003)."TheCartelinOregroundsIron:tradingintherawmaterialforsteelduringtheeighteenth

century".JournalofIndustrialHistory6(1):2549.49. "Ironandsteelindustry".Britannica.EncyclopdiaBritannica.2007.50. K.C.Barraclough,SteelbeforeBessemer:IICrucibleSteel:thegrowthoftechnology(TheMetalsSociety,

London,1984).51. Swank,JamesMoore(1892).HistoryoftheManufactureofIroninAllAges.ISBN0833734636.52. Bessemerprocess2.EncyclopdiaBritannica.2005.p.168.53. Basicoxygenprocess.EncyclopdiaBritannica.2007.54. Jones,J.A.T.Bowman,B.andLefrank,P.A.ElectricFurnaceSteelmaking,inTheMaking,Shapingand

TreatingofSteel,pp.525660.R.J.Fruehan,Editor.1998,TheAISESteelFoundation:Pittsburgh.55. "SteelIndustry"(http://bx.businessweek.com/steelindustry/).Retrieved20090712.56. "CongressionalRecordV.148,Pt.4,April11,2002toApril24,2002(http://books.google.com/books?

id=iOgfSDKecCcC&pg=PA4557&dq&hl=en#v=onepage&q=&f=false)".UnitedStatesGovernmentPrintingOffice.

57. "India'ssteelindustrystepsontoworldstage"(http://csmonitor.com/2007/0212/p07s02wosc.html).Retrieved20090712.

58. "Longtermplanningneededtomeetsteeldemand"(http://www.webcitation.org/5twr3Sstf).TheNews.20080301.Archivedfromtheoriginal(http://www.hellenicshippingnews.com/index.php?option=com_content&task=view&id=1576&Itemid=46)on20101102.Retrieved20101102.

59. Uchitelle,Louis(20090101)."SteelIndustry,inSlump,LookstoFederalStimulus"(http://www.nytimes.com/2009/01/02/business/02steel.html?_r=1&partner=permalink&exprod=permalink).TheNewYorkTimes.Retrieved20090719.

60. JohnW.MillerandIkeHenning,"Thiessengetsoffersformills:FinalbidsforsteelcomplexesinAlabama,Brazilwilllikelyfallshortofthecompany'shopes,"WallStreetJournalMarch1,2013

61. Hartman,RoyA.(2009).Recycling(http://web.archive.org/web/20080414215636/http://encarta.msn.com/encyclopedia_761556346/Recycling.html).Encarta.Archivedfromtheoriginal(http://encarta.msn.com/encyclopedia_761556346/Recycling.html)on20080414.

62. Fenton,MichaelD(2008)."IronandSteelScrap".InUnitedStatesGeologicalSurvey.MineralsYearbook2008,Volume1:MetalsandMinerals.GovernmentPrintingOffice.ISBN1411330153.

63. "Highstrengthlowalloysteels"(http://resources.schoolscience.co.uk/Corus/16plus/steelch3pg1.html).Schoolscience.co.uk.Retrieved20070814.

64. "Dualphasesteel"(http://www.intota.com/experts.asp?strSearchType=all&strQuery=dual%2Dphase+steel).IntotaExpertKnowledgeServices.Retrieved20070301.

65. Werner,Ewald."TransformationInducedPlasticityinlowalloyedTRIPsteelsandmicrostructureresponsetoacomplexstresshistory"(http://www.wkm.mw.tum.de/Forschung/projekte_html/transtrip.html).Retrieved20070301.

66. Mirko,CentiSalicetiStefano."TransformationInducedPlasticity(TRIP),TwinningInducedPlasticity(TWIP)andDualPhase(DP)Steels"(https://web.archive.org/web/20080307200557/http://www.dimet.unige.it/resta/studenti/2002/27839/26/TWIP,TRIPandDualphase+mirko.doc).TampereUniversityofTechnology.Archivedfromtheoriginal(http://www.dimet.unige.it/resta/studenti/2002/27839/26/TWIP,TRIPandDualphase%20mirko.doc)on20080307.Retrieved20070301.

67. Galvanicprotection.EncyclopdiaBritannica.2007.68. "SteelGlossary"(http://steel.org).AmericanIronandSteelInstitute(AISI).Retrieved20060730.69. "SteelInterchange"(https://web.archive.org/web/20071222180444/http://aisc.org/MSCTemplate.cfm?



Bibliography

Ashby,MichaelF.Jones,DavidRaynerHunkin(1992).Anintroductiontomicrostructures,processinganddesign.ButterworthHeinemann.Bugayev,K.Konovalov,Y.Bychkov,Y.Tretyakov,E.Savin,IvanV.(2001).IronandSteelProduction(http://books.google.com/?id=MJdIVtmwuUsC).TheMinervaGroup,Inc.ISBN9780894991097.Retrieved20090719..Degarmo,E.PaulBlack,JT.Kohser,RonaldA.(2003).MaterialsandProcessesinManufacturing(9thed.).Wiley.ISBN0471656534.Gernet,Jacques(1982).AHistoryofChineseCivilization.Cambridge:CambridgeUniversityPress.VereinDeutscherEisenhttenleute(Ed.).SteelAHandbookforMaterialsResearchandEngineering,Volume1:Fundamentals.SpringerVerlagBerlin,HeidelbergandVerlagStahleisen,Dsseldorf1992,737p.ISBN3540529683,ISBN3514003777.VereinDeutscherEisenhttenleute(Ed.).SteelAHandbookforMaterialsResearchandEngineering,Volume2:Applications.SpringerVerlagBerlin,HeidelbergandVerlagStahleisen,Dsseldorf1993,839p.ISBN354054075x,ISBN3514003785.Smith,WilliamF.Hashemi,Javad(2006).FoundationsofMaterialsScienceandEngineering(4thed.).McGrawHill.ISBN0072953586.

Furtherreading

69. "SteelInterchange"(https://web.archive.org/web/20071222180444/http://aisc.org/MSCTemplate.cfm?Section=Steel_Interchange2&Template=/CustomSource/Faq/SteelInterchange.cfm&FaqID=2311).AmericanInstituteofSteelConstructionInc.(AISC).Archivedfromtheoriginal(http://aisc.org/MSCTemplate.cfm?Section=Steel_Interchange2&Template=/CustomSource/Faq/SteelInterchange.cfm&FaqID=2311)on20071222.Retrieved20070228.

70. "PropertiesofMaragingSteels"(http://steel.keytometals.com/default.aspx?ID=CheckArticle&NM=103).Retrieved20090719.

71. Hadfieldmanganesesteel.(http://answers.com/topic/hadfieldmanganesesteel)Answers.com.McGrawHillDictionaryofScientificandTechnicalTerms,McGrawHillCompanies,Inc.,2003.Retrievedon20070228.

72. "Wingsofsteel:Analloyofironandaluminiumisasgoodastitanium,atatenthofthecost"(http://www.economist.com/news/scienceandtechnology/21642107alloyironandaluminiumgoodtitaniumtenth).TheEconomist.February7,2015.RetrievedFebruary5,2015."E02715"

73. SangHeonKim,HansooKim&NackJ.Kim(February5,2015)."Brittleintermetalliccompoundmakesultrastronglowdensitysteelwithlargeductility"(http://www.nature.com/nature/journal/v518/n7537/full/nature14144.html).Nature(NaturePublishingGroup)518:7779.doi:10.1038/nature14144(https://dx.doi.org/10.1038%2Fnature14144).RetrievedFebruary5,2015."weshowthatanFeAltypebrittlebuthardintermetalliccompound(B2)canbeeffectivelyusedasastrengtheningsecondphaseinhighaluminiumlowdensitysteel,whilealleviatingitsharmfuleffectonductilitybycontrollingitsmorphologyanddispersion."

74. Bringas,JohnE.(2004).HandbookofComparativeWorldSteelStandards:ThirdEdition(https://web.archive.org/web/20070127135646/http://www.astm.org/BOOKSTORE/PUBS/DS67B_SampleChapter.pdf)(PDF)(3rd.ed.).ASTMInternational.p.14.ISBN0803133626.Archivedfromtheoriginal(http://astm.org/BOOKSTORE/PUBS/DS67B_SampleChapter.pdf)(PDF)on20070127.

75. SteelConstructionManual,8thEdition,secondrevisededition,AmericanInstituteofSteelConstruction,1986,ch.1page15

76. Ochshorn,Jonathan(20020611)."Steelin20thCenturyArchitecture"(http://www.ochshorndesign.com/cornell/writings/steel.html).EncyclopediaofTwentiethCenturyArchitecture.Retrieved20100426.

77. Materialsscience.EncyclopdiaBritannica.2007.



WikimediaCommonshasmediarelatedtoSteel.

LookupsteelinWiktionary,thefreedictionary.

MarkReutter,MakingSteel:SparrowsPointandtheRiseandRuinofAmericanIndustrialMight(https://books.google.com/books?id=bdkUfDoY24QC&printsec=frontcover&dq=Making+Steel:+Sparrows+Point+and+the+Rise+and+Ruin+of+American+Industrial+Might&hl=en&sa=X&ei=NxHuVIe6DIzcoASoICICQ&ved=0CB4Q6AEwAA#v=onepage&q=Making%20Steel%3A%20Sparrows%20Point%20and%20the%20Rise%20and%20Ruin%20of%20American%20Industrial%20Might&f=false)(2005).DiscussionwithMarkReutter,part1of3(http://therealnews.com/t2/index.php?option=com_content&task=view&id=31&Itemid=74&jumival=13277)(February2015),part2of3(http://therealnews.com/t2/index.php?option=com_content&task=view&id=31&Itemid=74&jumival=13284)(February2015),part3of3(http://therealnews.com/t2/index.php?option=com_content&task=view&id=31&Itemid=74&jumival=13298)(March2015),TheRealNewsDuncanBurn,TheEconomicHistoryofSteelmaking,18671939:AStudyinCompetition(http://questia.com/PM.qst?a=o&d=3914930).CambridgeUniversityPress,1961.HarukiyuHasegawa,TheSteelIndustryinJapan:AComparisonwithBritain(http://questia.com/PM.qst?a=o&d=108742046).1996.J.C.CarrandW.Taplin,HistoryoftheBritishSteelIndustry(http://questia.com/PM.qst?a=o&d=808791).HarvardUniversityPress,1962.H.LeeScamehorn,Mill&Mine:TheCf&IintheTwentiethCentury(http://questia.com/PM.qst?a=o&d=94821694).UniversityofNebraskaPress,1992.Needham,Joseph(1986).ScienceandCivilizationinChina:Volume4,Part1&Part3.Taipei:CavesBooks,Ltd.Warren,Kenneth,BigSteel:TheFirstCenturyoftheUnitedStatesSteelCorporation,19012001(http://eh.net/bookreviews/library/0558).UniversityofPittsburghPress,2001.

Externallinks

WorldSteelAssociation(worldsteel)(http://www.worldsteel.org/)steeluniversity.org:OnlinesteeleducationresourcesfromworldsteelandtheUniversityofLiverpool(http://steeluniversity.org/)Hugearchiveonsteels,CambridgeUniversity(http://www.msm.cam.ac.uk/phasetrans/2005/Fealloys.html)CookingwithSteels(http://www.wastedtalent.ca/comic/cookingsteel)MetallurgyfortheNonMetallurgistfromtheAmericanSocietyforMetals(http://books.google.com/books?id=brpxLtdCLYC&pg=PA26&lpg=PA26&d#v=onepage&q&f=true,)MATDATDatabaseofPropertiesofUnalloyed,LowAlloyandHighAlloySteelsobtainedfrompublishedresultsofmaterialtesting(http://www.matdat.com)Newsfeatureon"openhearth"steelworkersattheU.S.SteelFairlessMillsnearPhiladelphia(https://news.google.com/newspapers?id=ArNdAAAAIBAJ&sjid=0V0NAAAAIBAJ&pg=1275%2C782046)

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