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，显微组织为均匀的索氏体、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，显微组织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，抗疲劳性能相当好。
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：20MN2 30MN2 35MN2 40MN2 50MN2 20MNV 27SIMN 35SIMN 42SIMN 20SIMN2MOV 25SIMN2MOV 37SIMN2MOV 40B 45B 50B 40MNB 45MNB 20MNMOB 15MNVB 20MNVB 40MNVB 20MNTIB 25MNTIBRE 15CR 15CRA 20CR 30CR 35CR 40CR 45CR 50CR 38CRSI 12CRMO 15CRMO 20CRMO 30CRMO 30CRMOA 35CRMO 35CRMO 42CRMO 12CRMOV 35CRMOV 12CR1MOV 25CR2MOVA 25CR2MO1VA 38CRMOAL 40CRV 50CRVA 15CRMN 20CRMN 40CRMN 20CRMNSI 25CRMNSI 30CRMNSI 30CRMNSIA 35CRMNSIA 20CRMNMO 40CRMNMO 20CRMNTI 30CRMNTI 20CRNI 40CRNI 45CRNI 50CRNI 12CRNI2 12CRNI3 20CRNI3 30CRNI3 37CRNI3 12CR2NI4 20CRNIMO 40CRNIMOA 18CRNIMNMOA 45CRNIMOVA 18CR2NI4WA 25CR2NI4WA 45H 45AH 15CrH 15CrAH 20CrH 20CrAH 20CrLH 20CrLAH 40CrH U59455 U59457 A20155 A20157 A20205 A20207 A20215 A20217 A20405 40CrAH 45CrH 45CrAH 15CrMoH 15CrMoAH 20CrMoH 20CrMoAH 22CrMoH 22CrMoAH 42CrMoH 42CrMoAH 16CrMnH 16CrMnAH 20CrMnH 20CrMnAH 15CrMnBH 15CrMnBAH 17CrMnBH 17CrMnBAH 40MnBAH 40MnBH 45MnBH 45MnBAH 20MnVBH 20MnVBAH 20MnTiBH 20MnTiBAH 20CrMnMoH 20CrMnMoAH 20CrMnTiH 20CrMnTiAH 20CrNi3H 20CrNi3AH 12Cr2Ni4H 12Cr2Ni4AH 20CrNiMoH A20407 A20455 A20457 A30155 A30157 A30205 A30207 A30225 A30227 A30425 A30427 A22165 A22167 A22205 A22207 A25155 A25157 A25175 A25177 A71407 A71405 A71455 A71457 A73205 A73207 A74205 A74207 A34205 A34207 A26205 A26207 A42205 A42207 A43125 A43127 A50205 20CrNiMoAH 20CrNi2MoH 20CrNi2MoAH A50207 A50215 A50217 55Ti 60Ti 70Ti 法C10E C10R C15E C15R XC10 XC18 C16E C16R 17Cr3 17CrS3 28Cr4 28CrS4 16MnCr5 16MnCrS5 16MnCrB5 20MnCr5 20MnCrS5 10NiCr5-4 15NiCr13 16NiCr4 16NiCrS4 18NiCr5-4 16MC5 20MC5 16NCD13 20MoCr3 20MoCrS3 20MoCr4 20MoCrS4 17CrNi6-6 18CrMo4 18CrMoS4 22CrMoS3-5 18CrNiMo7-6 14NiCrMo13-4 17NiCrMo6-4 17NiCrMoS6-4 20NiCrMo2-2 20NiCrMoS2-2 16CN6 18CD4 18CND6 20NCD2 20NiCrMoS6-4 24CrMo13-6 31CrMo12 31CrMoV9 33CrMoV12-9 32CrAlMo7-10 34CrAlMo5-10 41CrAlMo7-10 34CrAlNi7 C22E C22R C35 C35E C35R C40 C40E C40R C45 C45E C45R C50E C50R C55 C55E C55R C60 C60E C60R 28Mn6 XC18 XC18U XC38H1 XC38H1U XC4H1 XC4H1U XC48H1 XC48H1U XC55H1 XC55H1U 34Cr4 34CrS4 37Cr4 37CrS4 38Cr2 32C4 32C4U 38C4 38C4U 38C241Cr4 41CrS4 46Cr2 25CrMo4 25CrMoS4 34CrMo4 34CrMoS4 42CrMo4 42CrMoS4 50CrMo4 20MnB5 30MnB5 38MnB5 27MnCrB5-2 33MnCrB5-2 39MnCrB6-2 30CrNiMo8 30CrNiMo16-6 42C4 42C4U 25CD4 25CD4U 34CD4 34CD3U 42CD4 42CD4U 20MB5 38MB5 30CND8 34CrNiMo6 35NiCr5 36NiCrMo16 39NiCrMo3 51CrV4 35NCD16 51V4 8N8 10CD6 10CD8.10 10CND6 10F2 10N3 10N8 10N12 10NC12 10NCD4 10NCD5 10NCD12 10ND4 10ND8 10Pb2 10PbF2 12C3 12CD4 12CD10 12M5 12MF12NC2 12NC15 12ND16 14NC12 14NCD6 15CD2 15CD3.5 15NCD2 15ND8 15ND14 16N6 16NC11 16NC12 16NCD4 16NCD5 16NCD17 18C2 18C3 18C4 18CND6 18N3 18NC12 18NC13 20CD4 20CD8 20CD12 20CDV6 20F2 20N8 20N12 20NC2 20NC11 20ND8 20ND16 20Pb2 22N8 25NC6 25NC11 25NCD4 25NCD5 25NCD15 25NCD16 28C4 28CDV5 30CAD6.12 30N8 30NC6 30NC12 30NC16 30NCD2 30NCD2 30NCD8 30NCD11 30NCD12 30NCD15 30NCD16 32CDV12 32CND8 32CND11 32M5 32NC2 35C2 35MF4 35N3 35NC6 35NC11 35NCD2 35NCD4 35NCD5 35NCD14 35Pb2 38CMND8 38MS5 40CD4 40M5 40N3 40NC17 40NCD2 40NCD2TS 40NCD18 40NCD19 41S7 45C2 45C6 45CDV4 45M5 45NC2 45S8 50C4 50S7 55C2 55M5 60S7 70N8 100CDV4 105WC20 XC6 XC15 XC35 XC38TS XC48TS XC65 XC70 XC80 XC85 XC130 Z2NKD18.8 Z12N5 Z18N5 Z35NMC12.05 Z120M12 德C10 C10Pb C10GPb C15 C15Pb C15GPb C10E1.03011.03021.04011.04031.1121 C15E C16E 10NiCr5-4 14NiCr10 14NiCr14 15NiCr3 14NiCr18 16NiCr4 16NiCrS4 18NiCr5-4 17CrNi6-6 15CrNi6 18CrNi8 20NiCrMo2-2 21NiCrMo2 17NiCrMo6-4 17NiCrMoS6-4 20NiCrMoS6-4 18CrNiMo7-6 17CrNiMo6 17CrNiMo6 14NiCrMo13-4 13Cr2 15Cr3 17Cr3 17CrS3 20Cr4 20CrS4 28Cr4 28CrS4 16MnCr5 16MnCrS5 20MnCr5 20MnCrS5 16MnCrB5 18CrMo4 18CrMoS4 15CrMo5 20CrMo5 23CrMoB3-3 20CrMoS2 20CrMo2 20MoCr3 20MoCrS3 20MoCr4 20MoCrS4 25MoCr4 25MoCrS4 22CrMoS3-51.11411.11481.58051.57321.57521.58600.57141.57151.58101.59181.59191.5920
1.65231.65261.65661.65691.65711.65871.66571.70121.70151.70161.70141.70271.70281.70301.70361.71311.7139 171471.7149
1.71601.72431.72441.72621.72641.72711.73111.73201.73191.73211.73231.73251.7326
1.7333 34CrAl6 34CrAlS5 32CrAlMo7-10 34CrAlMo5-10 41CrAlMo7-10 41CrAlmo7-10 31CrMo12 24CrMo13-6 31CrMoV9 15CrMoV5-9 33CrMoV12-91.85041.85061.85051.85071.85091.85151.85161.85191.85211.8522 40CrMoV13-9 34CrAlNi7-10
1.85231.8550 C22 C25 C30 C35 C40 C45 C50 C55 C60 C22E CK22 C25E CK25 C30E CK30 C35E CK35 C40E CK40 C45E CK45 C50E CK50 C55E CK55 C60 E CK60 40Mn4 90Mn4 20Mn5 30Mn5 36Mn5 36Mn5 28Mn61.04021.04061.05281.05011.05111.05031.05401.05351.06011.1151
1.11491.11581.11631.11781.11791.11811.11801.11861.11891.1191 112011.12061.12411.12031.12091.12211.12231.11571.12731.12331.11651.11671.1170 38MnSi4 46MnSi4 37MnSi5 50MnSi4 53MnSi4 42MoV7 36NiCr61.51201.51211.51221.51311.51411.5223
1.5710 36NiCr10 31NiCr14 35NiCr18 28NiCrMo4 22NiCrMo4-7 35NiCrM16 28NiCrMoV8-5 33NiCrMo14-5 33NiCrMoV14-5 32Cr2 44Cr2 46Cr2 28Cr4 34Cr4 37Cr4 41Cr4 25CrMo41.57361.57551.58641.65131.67551.67731.69321.69561.7020
1.70214.70031.70231.35611.70061.70251.70301.70361.70331.70371.70371.70381.70351.70391.7218
1.7213 34CrMo4 42CrMo4 43CrMo4 48CrMo4 50CrMo4 32CrMo12 36CrNiMo4 34CrNiMo6 30CrNiMo8 51CrV4 58CrV4 42CrV6 30CrMoV9 14CrMoV6-9 X120Mn121.72201.72261.72251.72271.35631.35651.72281.73611.65111.6582
1.65801.81591.81611.75611.77071.7735
1.3401 国C10 C15E4 C15M2 20Cr4 20CrS4 16MnCr5 16MnCrS5 20MnCr5 20MnCrS5 20NiCrMo2 20NiCrMoS2 18CrNiMo7 31CrMo12 33CrAlMo54 41CrAlMo74 31CrMo12 33CrAlmo54 41CrAlMo74 C18 C20 C28E4 C20M2 C25 C25E4 C25M2 C30 C30E4 C30M2 C35 C35E4 C35M2 C40 C40E4 C40M2 C45 C45E4 C45M2 C50 C50E4 C50M2 C55 C55E4 C55M2 C60 C60E4 C60M2 28Mn6 36Mn6 42Mn6 34Cr4 34CrS4 37Cr4 37CrS4 41Cr4 41CrS4 25CrMo4 25CrMoS4 34CrMo4 34CrMoS4 42CrMo4 42CrMoS4 50CrMo4 36CrNiMo4 36CrNiMo6 31CrNiMo8 51CrV6 日SMN420 SMN433 SMN438 SMN443 SMNC420 SMNC443 SCR415 SCR420 SCR430 SCR435 SCR440 SCR445 SCM415 SCM418 SCM420 SCM421 SCM425 SCM425 SCM430 SCM432 SCM435 SCM440 SCM445 SCM822 SNC415 SNC631 SNC815 SNC836 SNCM220 SNCM240 SNCM415 SNCM420 SNCM415 SNCM420 SNCM431 SNCM439 SNCM447 SNCM616 SNCM625 SNCM815 SACM645 SMn420H SMN433H SMn438H SMn433H SMnC420H SMnC443H SCr415H SCr420H SCr430H SCr435H SCr440H SCM415H SCM418H SCM420H SCM425H SCM435H SCM440H SCM445H SCM822H SNC415H SNC631H SNC815H SNCM220H SNCM220H SNCM420H 韩SCr415H SCr420H SCr430H SCr435H SCr440H SNC415H SNC631H SNC815H SNCM220H SNCM420H SCM415H SCM418H SCM420H SCM435H SCM440H SCM445H SCM822H SMn420H SMn433H SMn438H SMn443H SMnC420H SMnC443H SCr21H SCr22H SCr2H SCr3H SCr4H SNC21H SNC2H SNC22H SNCM21H SNCM23H SCM21H SCM22H SCM3H SCM4H SCM5H SCM24H SMn21H SMn1H SMn2H SMn3H SMnC21H SMnC3H 瑞2085 2090 2101 2102 2103 2106 2107 2108 2110 2112 2114 2116 2117 2120 2121 2122 2127 2128 2130 2131 2132 2134 2135 2142 2143 2144 2145 2165 2168 2172 2173 2174 2203 2216 2218 2225 2228 2230 2231 2233 2234 2240 2244 2245 2253 2254 2258 2506 2510 2511 2512 2514 2515 2520 2523 2530 2532 2534 2536 2541 2614 2615 2624 2625 2532 2634 2642 2644 2652 2654 2662 2664 2912 2940 英605M36 606M36 635M15 655M13 655M17 708H37 708M40 709M40 722M24 805A22 805H22 805M17 808M17 817M40 820H17 822H17 822M17 826M40 835H15 835M15 835M30 945M38 523H15 523M15 527A17 527H17 527M17 590A15 590H17 590M17 635A14 635H15 635M15 637A16 637H17 637M17 655H13 655M13 655H17 655H20 655H23 655M17 655M20 655M23 708H20 351 352 36A 34 35 708M20 708M40 709H40 720M32 722M24 805A17 805A20 805A22 805H17 805H20 805H22 805M17 805M20 805M22 808H17 808M17 815H17 815M17 820H17 820M17 822H17 822M17 832H13 832M13 832M13 835H15 835M15 987M39 905M39 美国 A2317 A2330 A2340 A2345 E2512 E2515 E2514 2317 2330 2335 2340 2345 2512 2515 2517 A3115 A3120 A3130 335 3140 A3141 A3145 A3150 A3240 E3310 E3316 3115 3120 3130 3135 3140 X3140 3145 3150 3215 3220 3230 3240 3245 3250 3310 3312 3316 3325 3335 3340 3415 3435 3450 4012 4017 4023 4024 4027 4028 4032 4037 4042 4047 4063 4068 A4068 G13400 G40120 G40230 G40240 G40270 G40280 G40320 G40270 G40420 G40470 G40630 4118 A4119 A4125 TS4130 TS4132 E4132 TS4135 E4135 TS4137 E4137 TS4140 4119 4120 4121 4125 4130 4131 4135 4137 4140 G41400 G41370 G41350 G41310 G41300 G41210 G41200 G41180 4142 TS4142 4145 TS4145 4147 TS4147 4150 TS4150 4161 42B35 42B40 42B45 45B50 4320 4337 4145 4150 4161 43BV12 43BV14 4317 4320 4320 G41420 G41450 G41470 G41500 G41610 G43200 G43370 E4337 4340 E4340 4613 E4617 4618 4620 E4620 4340 E4340 4419 4422 4427 4520 4608 46B12 4615 4617 E4617 4620 X4620 4621 G43376 G43400 G43406 G44190 G44220 G44270 G45200 G46150 G46170 G46200 G46210 A4640 E4640 4715 4720 4815 4820 50B15 50B20 50B30 50B35 4626 4640 4615 4718 4720 5015 50B40 50B44 5045 G46260 G47150 G47180 G42500 G48150 G48170 G48200 G50150 G50401 G50441 50B46 TS50B50 TS50B60 5120 5130 5132 5140 5150 5046 50B46 50B50 50B60 5060 5115 6117 5120 5130 5132 5135 5140 5145 5147 5150 5152 G50460 G50461 G50601 G50600 G51150 G51170 G51200 G51300 G51320 G51350 G51440 G51450 G51470 G51500 5160 51B60 5195 5155 6150 6152 80B20 5155 5160 51B60 5195 6115 6117 6118 6120 6125 6130 6135 6140 6145 6150 6195 7260 G51550 G51600 G1601 G61180 G61200 G61500 80B25 80B30 80B35 80B40 TS80B40 80B45 TS80B45 80B50 80B55 80B60 8117 TS8117 8120 TS8120 8122 8123 8115 8117 8120 G81150 8125 TS8125 TS8126 8127 TS8127 8128 8130 TS8130 8132 TS8132 81B35 8135 TS8135 8137 TS8137 8140 TS8140 81B40 8127 8130 8132 8135 8137 8140 TS81B40 8142 TS8142 TS8145 8145 8147 TS81B45 TS8147 8150 TS8150 81B50 8155 TS8155 8160 TS8160 8165 8615 8142 8145 81B45 8147 8150 81B50 8155 8160 8616 G86150 G81450 TS8615 8617 TS8617 8620 TS8622 8625 TS8625 TS8627 8630 TS8630 TS8632 TS8635 8637 8617 8620 8622 8625 8627 8630 8632 8635 8637 G86170 G86200 G86220 G86250 G86270 G86300 G86370 TS8637 8640 TS8640 TS8641 TS8642 8645 TS8645 TS86B45 TS8647 8650 TS8653 8640 8641 8642 8645 86B45 8647 8650 8653 8655 G86400 G86450 G86451 G86500 G86550 TS8655 8660 8720 8747 8822 9259 8660 8715 8717 8719 8720 8735 8740 8742 8745 8750 8822 9250 9254 9255 9259 G86600 G87200 G87350 G87400 G87420 G88220 G92540 G92550 G92590 9260 E9310 E9314 E9315 E9317 94B20 9260 9261 9262 9310 9314 9315 9317 94B15 94B17 94B30 9437 9440 94B40 9442 9445 9447 9747 G92600 G92620 G93106 G94151 G94171 G94301 G94401 E51100 E52100 9763 9840 9845 9850 50100 51100 52100 71360 E71400 71660 G98400 G98500 G50986 G51986 G52986 G71406 1330 1335 1340 1345 4012 4023 4024 4027 G13300 G13350 G13400 G13450 G40120 G40230 G40240 G40270 1038H 1045H 1522H 1526H 1541H 15B21H 15B35H 15B37H 15B41H 15B48H 15B62H H10380 H10450 H15220 H15240 H15260 H15410 H15211 H15351 H15371 H15411 H15481 H153621 1330H 1335H 1340H1345H 4027H 4028H 4032H 4037H4042H 4047H 4118H 4130H 4135H 4137H 4140H4142H 4145H 4147H 4150H 4161H 4320H 4340H H4340H 4419H 4620H 4621H 4626H4626 4718H 4720H 4815H 4817H 4820H 50B40H 50B44H 5046H 50B46H 50B50H 50B60H 5120H 5130H 5132H 5135H 5140H 5145H 5147H 5150H 5155H 5160H 51B60H 6118H 6150H 81B45H 8617H 8620H 8622H 8625H 8627H 8630H 86B30H 8637H 8640H 8642H 8645H 86B45H 8650H 8655H 8660H 8720H 8740H 8822H 9260H 9310H 94B15H 94B17H 94B30H H13300 H13350 H13400 H13450 H40270 H40280 H40320 H40370 H40420 H40470 H41180 H41300 G41350 H41370 H41400 H41420 H41450 H41470 H41500 H41600 H43200 H43400 H43406 H44190 H46200 H46210 H46260 H47180 H47200 H48150 H48170 H48200 H50401 H50441 H50460 H50461 H50501 H50601 H51200 H51300 H51320 H51350 H51400 H51450 H51470 H51500 H51550 H51600 H51601 H61180 H61500 H81451 H86170 H86200 H86220 H86250 H86270 H86300 H86301 H86370 H86400 H86420 H86450 H86451 H86500 H86550 H86600 H87200 H87400 H88220 H92600 H93100 H94151 H94171 H94301 SAE 1046 SAE 1049 SAE 1050 SAE 1053 SAE 1055 SAE 1060 SAE 1065 SAE 1070 SAE 1074 SAE 1078 SAE 1080 SAE 1084 SAE 1085 SAE 1086 SAE 1090 SAE 1095 SAE 1522 SAE 1524 SAE 1526 SAE 1527 SAE 1536 SAE 1541 SAE 1547 SAE 1548 SAE 1552 SAE 1566 SAE 1117 SAE 1118 SAE 1126 SAE 1132 SAE 1137 SAE 1138 SAE 1140 SAE 1141 SAE 1144 SAE 1146 SAE 1151 SAE 1212 SAE 1213 SAE 12L14 SAE 1215 SAF 3310 SAF CBS600 SAF CBS1000M SAF 9310 SAF 9615 SAF 9317 SAF 9310 SAF 43BV12 SAF 9310 SAF 8615 SAF 8617 SAF 8620 SAF 94B17 SAF 8620 SAF 8620 SAF 8630 SAF 8630 SAF 8735 SAF 4615 SAF 4617 SAF 4620 SAF 4620H SAF 4037 SAF 17-22A SAF 17-22AV SAF 17-22A SAF 17-22A SAF Pyrowearalloy53 SAF 4640 SAF 4640 SAF 8735 SAF 81B40 SAF 8740 SAF 8740 SAF 8740mod SAF 8740 SAF 8740 SAF 8750 SAF 3135 SAF 9840 SAF 4130 SAF 4140 SAF 4130 SAF 4130 SAF 4135 SAF 8630 SAF 4132 SAF 8735 SAF 8740 SAF 4340 SAF 4130 SAF 4130 SAF 4130 SAF 4135 SAF 4130 SAF 4130 SAF 4135 SAF 4130 SAF 4142H SAF 4140mod SA F4140 SAF 4140 SAF 17-22A SAF 4140 SAF 4140 SAF X200 SAF HS-220 SAF 4340 SAF 4330mld SAF 4337 SAF 4337 SAF 4340 SAF 4340 SAF 4340 SAF 300M SAF Hy-tuf SAF 300M SAF 98B37mod SAF 98BV40mod SAF 52CB4330mod SAF 4335mod SAF 4335mod SAF 4335mod SAF D6AC SAF D4A SAF 4335mod SAF 4335mod SAF 4335mod SAF 4335mod SAF 17-22A SAF H-11 SAF D6AC SAF D6AC SAF 52100 SAF 50100 SAF 51100 SAF 52100 SAF 51100mod SAF 51100 SAF 52100 SAF 6150 SAF 9254 SAF 4340 SAF 6150 SAF 135mod SAF 135mod SAF 135mod SAF H-11 SA FH-11 SAF H-11 SAF M-50 SAF M-50 SAF Maraging250 SAF HP9-4-25 SAF 8630 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