合金结构钢由于具有合适的淬透性，经适宜的金属热处理后，显微***为均匀的索氏体、贝氏体或极细的珠光体，因而具有较高的抗拉强度和屈强比（一般在0.85左右），较高的韧性和疲劳强度，和较低的韧性－脆性转变温度，可用于制造截面尺寸较大的机器零件。合金结构钢一般分为调质结构钢和表面硬化结构钢。①调质结构钢这类钢的含碳量一般约为0.25％～0.55％，对于既定截面尺寸的结构件，在调质处理（淬火加回火）时，如果沿截面淬透，则力学性能良好，如果淬不透，显微***中出现有自由铁素体，则韧性下降。对具有回火脆性倾向的钢如锰钢、铬钢、镍铬钢等，回火后应快冷。这类钢的淬火临界直径，随晶粒度和合金元素含量的增加而增大，例如，40Cr和35SiMn钢约为30～40mm，而40CrNiMo和30CrNi2MoV钢则约为60～100mm，常用于制造承受较大载荷的轴、连杆等结构件。②表面硬化结构钢用以制造表层坚硬耐磨而心部柔韧的零部件,如齿轮、轴等。为使零件心部韧性高,钢中含碳量应低，一般在0.12～0.25％，同时还有适量的合金元素，以保证适宜的淬透性。氮化钢还需加入易形成氮化物的合金元素（如Al、Cr、Mo等）。渗碳或碳氮共渗钢，经850～950℃渗碳或碳氮共渗后，淬火并在低温回火(约200℃)状态下使用。氮化钢经氮化处理(480～580℃)，直接使用，不再经淬火与回火处理。冶炼工艺稳定，淬透性好，碳氮共渗工艺性能良好，热处理后的变形量小，无回火脆性，加工制造性能和焊接性能均良好。要求具有较高的屈服强度、抗拉强度和疲劳强度，还有足够的塑性和韧性。良好的加工性，加工变形微小，耐磨性良好，***性能相当好。用于轴类、活塞类零配件、汽车、飞机各种特殊耐磨零配件等。合金结构钢：20MN230MN235MN240MN250MN220MNV27SIMN35SIMN42SIMN20SIMN2MOV25SIMN2MOV37SIMN2MOV40B45B50B40MNB45MNB20MNMOB15MNVB20MNVB40MNVB20MNTIB25MNTIBRE15CR15CRA20CR30CR35CR40CR45CR50CR38CRSI12CRMO15CRMO20CRMO30CRMO30CRMOA35CRMO35CRMO42CRMO12CRMOV35CRMOV12CR1MOV25CR2MOVA25CR2MO1VA38CRMOAL40CRV50CRVA15CRMN20CRMN40CRMN20CRMNSI25CRMNSI30CRMNSI30CRMNSIA35CRMNSIA20CRMNMO40CRMNMO20CRMNTI30CRMNTI20CRNI40CRNI45CRNI50CRNI12CRNI212CRNI320CRNI330CRNI337CRNI312CR2NI420CRNIMO40CRNIMOA18CRNIMNMOA45CRNIMOVA18CR2NI4WA25CR2NI4WA45H45AH15CrH15CrAH20CrH20CrAH20CrLH20CrLAH40CrHU59455U59457A20155A20157A20205A20207A20215A20217A2040540CrAH45CrH45CrAH15CrMoH15CrMoAH20CrMoH20CrMoAH22CrMoH22CrMoAH42CrMoH42CrMoAH16CrMnH16CrMnAH20CrMnH20CrMnAH15CrMnBH15CrMnBAH17CrMnBH17CrMnBAH40MnBAH40MnBH45MnBH45MnBAH20MnVBH20MnVBAH20MnTiBH20MnTiBAH20CrMnMoH20CrMnMoAH20CrMnTiH20CrMnTiAH20CrNi3H20CrNi3AH12Cr2Ni4H12Cr2Ni4AH20CrNiMoHA20407A20455A20457A30155A30157A30205A30207A30225A30227A30425A30427A22165A22167A22205A22207A25155A25157A25175A25177A71407A71405A71455A71457A73205A73207A74205A74207A34205A34207A26205A26207A42205A42207A43125A43127A5020520CrNiMoAH20CrNi2MoH20CrNi2MoAHA50207A50215A5021755Ti60Ti70Ti法C10EC10RC15EC15RXC10XC18C16EC16R17Cr317CrS328Cr428CrS416MnCr516MnCrS516MnCrB520MnCr520MnCrS510NiCr5-415NiCr1316NiCr416NiCrS418NiCr5-416MC520MC516NCD1320MoCr320MoCrS320MoCr420MoCrS417CrNi6-618CrMo418CrMoS422CrMoS3-518CrNiMo7-614NiCrMo13-417NiCrMo6-417NiCrMoS6-420NiCrMo2-220NiCrMoS2-216CN618CD418CND620NCD220NiCrMoS6-424CrMo13-631CrMo1231CrMoV933CrMoV12-932CrAlMo7-1034CrAlMo5-1041CrAlMo7-1034CrAlNi7C22EC22RC35C35EC35R***0***0E***0R***5***5E***5RC50EC50RC55C55EC55RC60C60EC60R28Mn6XC18XC18UXC38H1XC38H1UX***H1X***H1UX***8H1X***8H1UXC55H1XC55H1U34Cr434CrS437Cr437CrS438Cr232***32***U38***38***U38C241Cr441CrS446Cr225CrMo425CrMoS434CrMo434CrMoS442CrMo442CrMoS450CrMo420MnB530MnB538MnB527MnCrB5-233MnCrB5-239MnCrB6-230CrNiMo830CrNiMo16-642***42***U25CD425CD4U34CD434CD3U42CD442CD4U20MB538MB530CND834CrNiMo635NiCr536NiCrMo1639NiCrMo351CrV435NCD1651V48N810CD610CD8.1010CND610F210N310N810N1210NC1210NCD410NCD510NCD1210ND410ND810Pb210PbF212C312CD412CD1012M512MF12NC212NC1512ND1614NC1214NCD615CD215CD3.515NCD215ND815ND1416N616NC1116NC1216NCD416NCD516NCD1718C218C318***18CND618N318NC1218NC1320CD420CD820CD1220CDV620F220N820N1220NC220NC1120ND820ND1620Pb222N825NC625NC1125NCD425NCD525NCD1525NCD1628***28CDV530CAD6.1230N830NC630NC1230NC1630NCD230NCD230NCD830NCD1130NCD1230NCD1530NCD1632CDV1232CND832CND1132M532NC235C235MF435N335NC635NC1135NCD235NCD435NCD535NCD1435Pb238CMND838MS540CD440M540N340NC1740NCD240NCD2TS40NCD1840NCD1941S745C245C645CDV445M545NC245S850***50S755C255M560S770N8100CDV4105WC20XC6XC15XC35XC38TSX***8TSXC65XC70XC80XC85XC130Z2NKD18.8Z12N5Z18N5Z35NMC12.05Z120M12德C10C10PbC10GPbC15C15PbC15GPbC10E1.03011.03021.04011.04031.1121C15EC16E10NiCr5-414NiCr1014NiCr1415NiCr314NiCr1816NiCr416NiCrS418NiCr5-417CrNi6-615CrNi618CrNi820NiCrMo2-221NiCrMo217NiCrMo6-417NiCrMoS6-420NiCrMoS6-418CrNiMo7-617CrNiMo617CrNiMo614NiCrMo13-413Cr215Cr317Cr317CrS320Cr420CrS428Cr428CrS416MnCr516MnCrS520MnCr520MnCrS516MnCrB518CrMo418CrMoS415CrMo520CrMo523CrMoB3-320CrMoS220CrMo220MoCr320MoCrS320MoCr420MoCrS425MoCr425MoCrS422CrMoS3-51.11411.11481.58051.57321.57521.58600.57141.57151.58101.59181.59191.59201.65231.65261.65661.65691.65711.65871.66571.70121.70151.70161.70141.70271.70281.70301.70361.71311.7139171471.71491.71601.72431.72441.72621.72641.72711.73111.73201.73191.73211.73231.73251.73261.733334CrAl634CrAlS532CrAlMo7-1034CrAlMo5-1041CrAlMo7-1041CrAlmo7-1031CrMo1224CrMo13-631CrMoV915CrMoV5-933CrMoV12-91.85041.85061.85051.85071.85091.85151.85161.85191.85211.852240CrMoV13-934CrAlNi7-101.85231.8550C22C25C30C35***0***5C50C55C60C22ECK22C25ECK25C30ECK30C35ECK35***0ECK40***5ECK45C50ECK50C55ECK55C60ECK6040Mn490Mn420Mn530Mn536Mn536Mn528Mn61.04021.04061.05281.05011.05111.05031.05401.05351.06011.11511.11491.11581.11631.11781.11791.11811.11801.11861.11891.1191112011.12061.12411.12031.12091.12211.12231.11571.12731.12331.11651.11671.117038MnSi446MnSi437MnSi550MnSi453MnSi442MoV736NiCr61.51201.51211.51221.51311.51411.52231.571036NiCr1031NiCr1435NiCr1828NiCrMo422NiCrMo4-735NiCrM1628NiCrMoV8-533NiCrMo14-533NiCrMoV14-532Cr244Cr246Cr228Cr434Cr437Cr441Cr425CrMo41.57361.57551.58641.65131.67551.67731.69321.69561.70201.70214.70031.70231.35611.70061.70251.70301.70361.70331.70371.70371.70381.70351.70391.72181.721334CrMo442CrMo443CrMo448CrMo450CrMo432CrMo1236CrNiMo434CrNiMo630CrNiMo851CrV458CrV442CrV630CrMoV914CrMoV6-9X120Mn121.72201.72261.72251.72271.35631.35651.72281.73611.65111.65821.65801.81591.81611.75611.77071.77351.3401国C10C15E4C15M220Cr420CrS416MnCr516MnCrS520MnCr520MnCrS520NiCrMo220NiCrMoS218CrNiMo731CrMo1233CrAlMo5441CrAlMo7431CrMo1233CrAlmo5441CrAlMo74C18C20C28E4C20M2C25C25E4C25M2C30C30E4C30M2C35C35E4C35M2***0***0E4***0M2***5***5E4***5M2C50C50E4C50M2C55C55E4C55M2C60C60E4C60M228Mn636Mn642Mn634Cr434CrS437Cr437CrS441Cr441CrS425CrMo425CrMoS434CrMo434CrMoS442CrMo442CrMoS450CrMo436CrNiMo436CrNiMo631CrNiMo851CrV6日***N420***N433***N438***N443***N***20***N***43SCR415SCR420SCR430SCR435SCR440SCR445SCM415SCM418SCM420SCM421SCM425SCM425SCM430SCM432SCM435SCM440SCM445SCM822SN***15SNC631SNC815SNC836SNCM220SNCM240SNCM415SNCM420SNCM415SNCM420SNCM431SNCM439SNCM447SNCM616SNCM625SNCM815SACM645***n420H***N433H***n438H***n433H***n***20H***n***43HSCr415HSCr420HSCr430HSCr435HSCr440HSCM415HSCM418HSCM420HSCM425HSCM435HSCM440HSCM445HSCM822HSN***15HSNC631HSNC815HSNCM220HSNCM220HSNCM420H韩SCr415HSCr420HSCr430HSCr435HSCr440HSN***15HSNC631HSNC815HSNCM220HSNCM420HSCM415HSCM418HSCM420HSCM435HSCM440HSCM445HSCM822H***n420H***n433H***n438H***n443H***n***20H***n***43HSCr21HSCr22HSCr2HSCr3HSCr4HSNC21HSNC2HSNC22HSNCM21HSNCM23HSCM21HSCM22HSCM3HSCM4HSCM5HSCM24H***n21H***n1H***n2H***n3H***nC21H***nC3H瑞20852090210121022103210621072108211021122114211621172120212121222127212821302131213221342135214221432144214521652168217221732174220322162218222522282230223122332234224022442245225322542258250625102511251225142515252025232530253225342536254126142615262426252532263426422644265226542662266429122940英605M36606M36635M15655M13655M17708H37708M40709M40722M24805A22805H22805M17808M17817M40820H17822H17822M17826M40835H15835M15835M30945M38523H15523M15527A17527H17527M17590A15590H17590M17635A14635H15635M15637A16637H17637M17655H13655M13655H17655H20655H23655M17655M20655M23708H2035135236A3435708M20708M40709H40720M32722M24805A17805A20805A22805H17805H20805H22805M17805M20805M22808H17808M17815H17815M17820H17820M17822H17822M17832H13832M13832M13835H15835M15987M39905M39美国A2317A2330A2340A2345E2512E2515E251423172330233523402345251225152517A3115A3120A31303353140A3141A3145A3150A3240E3310E331631153120313031353140X314031453150321532203230324032453250331033123316332533353340341534353450401240174023402440274028403240374042404740634068A4068G13400G40120G40230G40240G40270G40280G40320G40270G40420G40470G406304118A4119A4125TS4130TS4132E4132TS4135E4135TS4137E4137TS4140411941204121412541304131413541374140G41400G41370G41350G41310G41300G41210G41200G411804142TS41424145TS41454147TS41474150TS4150416142B3542B4042B4545***4320433741454150416143BV1243BV14431743204320G41420G41450G41470G41500G41610G43200G43370E43374340E43404613E461746184620E46204340E43404419442244274520460846B1246154617E46174620X46204621G43376G43400G43406G44190G44220G44270G45200G46150G46170G46200G46210A4640E4640471547204815482050B1550B2050B3050B3546264640461547184720501550B4050B445045G46260G47150G47180G42500G48150G48170G48200G50150G50401G5044150B46TS50***TS50B6051205130513251405150504650B4650***50B60506051156117512051305132513551405145514751505152G50460G50461G50601G50600G51150G51170G51200G51300G51320G51350G51440G51450G51470G51500516051B60519551556150615280B205155516051B605195611561176118612061256130613561406145615061957260G51550G51600G1601G61180G61200G6150080B2580B3080B3580B40TS80B4080B45TS80B4580***80B5580B608117TS81178120TS812081228123811581178120G811508125TS8125TS81268127TS812781288130TS81308132TS813281B358135TS81358137TS81378140TS814081B40812781308132813581378140TS81B408142TS8142TS814581458147TS81B45TS81478150TS815081***8155TS81558160TS8160816586158142814581B458147815081***815581608616G86150G81450TS86158617TS86178620TS86228625TS8625TS86278630TS8630TS8632TS86358637861786208622862586278630863286358637G86170G86200G86220G86250G86270G86300G86370TS86378640TS8640TS8641TS86428645TS8645TS86B45TS86478650TS8653864086418642864586B458647865086538655G86400G86450G86451G86500G86550TS865586608720874788229259866087158717871987208735874087428745875088229250925492559259G86600G87200G87350G87400G87420G88220G92540G92550G925909260E9310E9314E9315E931794B20926092619262931093149315931794B1594B1794B309437944094B409442944594479747G92600G92620G93106G94151G94171G94301G94401E51100E52100976398409845985050100511005210071360E7140071660G98400G98500G50986G51986G52986G7140613301335134013454012402340244027G13300G13350G13400G13450G40120G40230G40240G402701038H1045H1522H1526H1541H15B21H15B35H15B37H15B41H15B48H15B62HH10380H10450H15220H15240H15260H15410H15211H15351H15371H15411H15481H1536211330H1335H1340H1345H4027H4028H4032H4037H4042H4047H4118H4130H4135H4137H4140H4142H4145H4147H4150H4161H4320H4340HH4340H4419H4620H4621H4626H46264718H4720H4815H4817H4820H50B40H50B44H5046H50B46H50***H50B60H5120H5130H5132H5135H5140H5145H5147H5150H5155H5160H51B60H6118H6150H81B45H8617H8620H8622H8625H8627H8630H86B30H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