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合金结构钢的牌号及化学成分 摘自GB/T3077—1999)化学成分(质量分数),%

(表一)牌号20Mn20.20Mn20.17~0.240.17~0.371.40~1.8030Mn20.27~0.340.17~0.371.40~1.8035Mn20.32~0.390.17~0.371.40~1.8040Mn20.37~0.440.17~0.371.40~1.8045Mn20.42~0.490.17~0.371.40~1.8050Mn20.47~0.550.17~0.371.40~1.8020MnV0.17~0.240.17~0.371.30~1.600.07~0.1227SiMn0.24~0.321.10~1.401.10~1.4035SiMn0.32~0.401.10~1.401.10~1.4042SiMn0.39~0.451.10~1.401.10~1.4020Mn2MoV0.17~0.230.92~1.202.20~2.600.30~0.400.05~0.1225Mn2MoV0.22~0.280.92~1.202.20~2.600.30~0.400.05~0.1237Mn2MoV0.33~0.390.60~0.901.60~1.900.40~0.500.05~0.1240B0.37~0.440.17~0.370.60~0.900.0005~0.003545B0.42~0.490.17~0.370.60~0.900.0005~0.003550B0.47~0.550.17~0.370.60~0.900.0005~0.003540MnB0.37~0.440.17~0.371.10~1.400.0005~0.003545MnB0.42~0.490.17~0.371.10~1.400.0005~0.0035

Si(硅)

Mn(锰)

Mo(钼)

V(钒)

B(硼)

(表二)化学成分(质量分数),%牌号C(碳)

Si

Mn(锰)

Mo(钼)

Cr(铬)

V(钒)

Ti(钛)

B() 其他20MnMo

0.16~0.22

0.17~0.37

0.90~1.20

0.20~0.30

0.40~0.10

0.0005~0.003515MnVB15MnVB0.12~0.180.17~0.371.20~1.600.07~0.120.40~0.100.0005~0.003520MnVB0.17~0.230.17~0.371.20~1.400.07~0.120.0005~0.003540MnVB0.37~0.440.17~0.371.10~1.400.05~0.100.0005~0.003520MnTiBRE0.17~0.240.17~0.341.30~1.600.0005~0.003525MnTiBRE0.22~0.280.20~0.451.30~1.600.0005~0.0035 RE:0.0515Cr0.12~0.180.17~0.370.40~0.700.70~1.0020Cr0.17~0.240.17~0.370.50~0.800.70~1.0030Cr0.27~0.340.17~0.370.50~0.800.80~1.1035Cr0.32~0.390.17~0.370.50~0.800.80~1.1040Cr0.37~0.440.17~0.370.50~0.800.80~1.1045Cr0.42~0.490.17~0.370.50~0.800.80~1.1050Cr0.47~0.540.17~0.370.50~0.800.80~1.1038CrSi0.35~0.431.00~1.300.30~0.601.30~1.6012CrMo0.08~0.150.17~0.370.40~0.700.40~0.550.40~0.7015CrMo0.12~0.180.17~0.370.40~0.700.40~0.550.80~1.1020CrMo0.17~0.240.17~0.370.40~0.700.15~0.250.80~1.10(表三)牌号C(碳)Si(硅)Mn(锰)化学成分质量分),%Mo(钼) Cr(铬V其他30CrMo0.26~0.340.17~0.370.40~0.700.15~0.250.80~1.1035CrMo0.32~0.400.17~0.370.40~0.700.15~0.250.80~0.7042CrMo0.38~0.450.17~0.370.50~0.800.15~0.250.90~1.2012CrMoV0.08~0.150.17~0.370.40~0.700.25~0.350.30~0.600.15~0.3035CrMoV0.30~0.380.17~0.370.40~0.700.20~0.301.00~1.300.10~0.2012CrMoV0.08~0.150.17~0.370.40~0.700.25~0.350.90~1.200.15~0.3025CrMoVA25CrMoVA0.22~0.290.17~0.370.40~0.700.25~0.351.50~1.800.15~0.3025CrMo1VA0.22~0.290.17~0.370.50~0.800.90~1.102.10~2.500.30~0.5038CrMoAl0.35~0.420.20~0.450.30~0.600.15~0.251.35~1.65Al:0.70~1.1040CrV0.37~0.440.17~0.370.50~0.800.80~1.100.10~0.2050CrVA0.47~0.540.17~0.370.50~0.800.80~1.100.10~0.2015CrMn0.12~0.180.17~0.371.10~1.400.40~0.70(表四)牌号化学成分(质量分数),%C(碳)Si(硅)Mn(锰)Mo(钼)Cr(铬)Ni(镍)V(钒)钛) 其他20CrMn0.17~0.230.17~0.370.90~1.2040CrMn0.37~0.450.17~0.370.90~1.200.90~1.2020CrMnSi0.17~0.230.90~1.200.80~1.100.80~1.1025CrMnSi0.22~0.290.90~1.200.80~1.100.80~1.1030CrMnSi0.27~0.340.90~1.200.80~1.1035CrMnSiA0.32~0.391.10~1.400.80~1.101.10~1.4020CrMnMo0.17~0.230.17~0.370.90~1.200.20~0.301.10~1.4040CrMnMo0.37~0.450.17~0.370.90~1.200.20~0.300.90~1.2020CrMnTi0.17~0.230.17~0.370.80~1.101.00~1.300.40~0.1030CrMnTi0.24~0.320.17~0.370.80~1.101.00~1.300.40~0.1020CrNi0.17~0.230.17~0.370.40~0.700.45~0.751.00~1.4040CrNi0.37~0.440.17~0.370.50~0.800.45~0.751.00~1.4045CrNi0.42~0.490.17~0.370.50~0.800.45~0.751.00~1.4050CrNi0.47~0.540.17~0.370.50~0.800.45~0.751.00~1.4012CrNi20.10~0.170.17~0.370.30~0.600.60~0.901.50~2.0012CrNi312CrNi30.10~0.170.17~0.370.30~0.600.60~0.902.75~3.2520CrNi30.17~0.240.17~0.370.30~0.600.60~0.902.75~3.2530CrNi30.27~0.340.17~0.370.30~0.600.60~0.902.75~3.2537CrNi30.34~0.410.17~0.370.30~0.601.20~1.603.00~3.5012Cr2Ni40.10~0.170.17~0.370.30~0.601.25~1.753.25~3.7520Cr2Ni40.17~0.230.17~0.370.30~0.601.25~1.753.25~3.7520CrNiMo0.17~0.230.17~0.370.60~0.950.20~0.300.40~0.700.35~0.7540CrNiMoA0.37~0.440.17~0.370.50~0.800.15~0.250.60~0.901.25~1.7545CrNiMoVA0.42

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