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美国AISI A3120合金结构钢的化学成分：
C碳：0.17-0.22
Si硅:0.20-0.35
Mn锰: 0.6-0.8
P磷: ≤0.025
S硫: ≤0.025
Cr铬: 0.55-0.75
Ni镍:1.10-1.40
合金结构钢：国产12Mn,18Nb,10MnSiCu,12MnV,14MnNb,16Mn,15MnV,15MnTi,16MnNb,20Mn2
30Mn2,35Mn2,40Mn2,45Mn2,50Mn2,20MnV,27SiMn,,20MnVB,40MnVB,20MnTiB,20SiMnVB,15Cr,15CrA,20Cr,30Cr,35Cr,40Cr,45Cr,
50Cr,38CrSi,40CrMn,20CrMnSi,25CrMnSi,Q345,Q295,Q390,Q420
美国：1320, 1330 ,1325, 1340, 1345,,5120, 5130, 5135, 5140, 5145, 5150, 4119, 4118, 4135 4140 ,6140, 5115, 5120, 4119, 4142, 3140, 3415, 3310, 3435 ,2515 ,3316, 8620 ,4340,E3310,E3316,4347
德国：20Mn6 ,30Mn5, 36Mn5 ,46Mn7, 50Mn7, 15MnV5, 20MnV6 ,42MnV7 ,37MnSi5, 46MnSi4, 15Cr3, 20Cr4 28Cr4, 34Cr4 ,
41Cr4, 13CrMo4.4 ，15CrMo5，20CrMo5，25CrMo4，51CrV4,
日本：SMn420,SMn433,SMn438,SMn443,SCr415,SCr420,SCr430,
SCr435,SCr440,SCr450,SCM415,SCM420,SCM435,SCM440,SCM430,SACM645,SMnC420,SMnC443,SNC236,SNC415,SNC815,SNC631,SNC836,SNCM220,以上材料仅供参考，如有需要，欢迎来电咨询！
