钢牌号及化学成分
一、结构钢牌号及化学成分
1、普通碳素结构钢牌号及化学成分：
化学成分（%）
执行标准
牌号
C
Q1950.06～0.12Q215A0.09～0.15Q315B0.09～0.15Q235A0.14～0.22GB700-1988
Q335B0.12～0.20Q235C≤0.18Q235D≤0.17Q255A0.18～0.28Q255B0.18～0.28Q2750.28～0.382、优质碳素结构钢牌号及化学成分：执行标准牌号
C
GB/T69908F 0.05～0.11GB/T69910FGB/T69915F0.07～0.130.12～0.18GB/T69980.05～0.11GB/T699100.07～0.13GB/T69915GB/T699200.12～0.180.17～0.23GB/T699250.22～0.29GB/T699300.27～0.34GB/T699350.32～0.39
GB/T699
40
0.37～0.44
Si
Mn
0.12～0.300.25～0.500.12～0.300.25～0.550.12～0.300.25～0.550.12～0.300.30～0.650.12～0.300.30～0.700.12～0.300.35～0.800.12～0.300.35～0.800.12～0.300.40～0.700.12～0.300.40～0.700.15～0.350.5～0.80
化学成分（%）
Si
Mn
≤0.030.25～0.50≤0.07≤0.070.25～0.500.17～0.370.25～0.500.35～0.650.17～0.370.17～0.370.35～0.650.17～0.370.35～0.650.17～0.370.35～0.650.17～0.370.50～0.800.50～0.800.17～0.37
0.50～0.80
0.17～0.37
0.50～0.80
P
P 0.0350.0350.0350.0350.0350.0350.0350.0350.0350.0350.035
S
S 0.0350.0350.0350.0350.0350.0350.0350.0350.0350.0350.035
Cr0.10.150.250.10.150.250.250.250.250.250.25
≤0.045≤0.045≤0.045≤0.045≤0.045≤0.040≤0.030≤0.045≤0.045≤0.045≤0.050≤0.050≤0.045≤0.050≤0.045≤0.040≤0.030≤0.050≤0.045≤0.050
GB/T699450.42～0.50GB/T699500.47～0.55GB/T699550.52～0.60GB/T699600.57～0.65GB/T699650.62～0.70GB/T699700.67～0.75GB/T699750.72～0.80GB/T699800.77～0.85GB/T699850.82～0.90GB/T699Mn150.12～0.18GB/T699Mn200.17～0.23GB/T699Mn250.22～0.29GB/T699Mn300.27～0.34GB/T699Mn350.32～0.39GB/T699Mn400.37～0.44GB/T699Mn450.42～0.50GB/T699Mn500.48～0.56GB/T699Mn600.57～0.65GB/T699Mn650.62～0.70GB/T699Mn700.67～0.753、低合金高度结构钢号及化学成分：执行标准牌号C≤GB/T1591Q295A0.16GB/T1591Q395B0.16GB/T1591Q345A0.2GB/T1591Q345B0.2GB/T1591Q345C0.2GB/T1591
Q345D
0.18
0.17～0.370.17～0.370.17～0.370.17～0.370.17～0.370.17～0.370.17～0.370.17～0.370.17～0.370.17～0.370.17～0.370.17～0.370.17～0.370.17～0.370.17～0.370.17～0.370.17～0.370.17～0.370.17～0.370.17～0.37Mn0.80～1.500.80～1.500.10～1.600.10～1.600.10～1.600.10～1.60
0.50～0.800.50～0.800.50～0.800.50～0.800.50～0.800.50～0.800.50～0.800.50～0.800.50～0.800.70～1.000.70～1.000.70～1.000.70～1.000.70～1.000.70～1.000.70～1.000.70～1.000.70～1.000.90～1.200.90～1.20Si0.550.550.550.550.550.55
0.0350.0350.250.0350.0350.250.0350.0350.250.0350.0350.250.0350.0350.250.0350.0350.250.0350.0350.250.0350.0350.250.0350.0350.250.0350.0350.250.0350.0350.250.0350.0350.250.0350.0350.250.0350.0350.250.0350.0350.250.0350.0350.250.0350.0350.250.0350.0350.250.0350.0350.250.0350.0350.25
化学成分（%）
PSCr
≤0.0450.0450.040.040.0450.0450.040.040.0350.0350.03
0.03
GB/T1591Q345E0.18GB/T1591Q345A0.2GB/T1591Q390B0.2GB/T1591Q390C0.2GB/T1591Q390D0.2GB/T1591Q390E0.2GB/T1591Q420A0.2GB/T1591Q420B0.2GB/T1591Q420C0.2GB/T1591Q420D0.18GB/T1591Q420E0.18GB/T1591Q460C0.2GB/T1591Q460D0.2GB/T1591Q460E0.24、合金机构钢牌号及化学成分
（1）、锰合金机构钢牌号及化学成分：执行标准
牌号
C
GB/T307720Mn20.17～0.24GB/T307730Mn20.27～0.34GB/T307735Mn20.32～0.39GB/T307740Mn20.37～0.44GB/T307745Mn20.42～0.49GB/T307750Mn20.47～0.55(2)、锰钒合金结构钢牌号及化学成分：GB/T1591Q345B0.2GB/T1591Q345C0.2GB/T1591Q345D0.18GB/T1591Q345E0.18
0.10～1.600.10～1.600.10～1.600.10～1.600.10～1.600.10～1.601.00～1.701.00～1.701.00～1.701.00～1.701.00～1.701.00～1.701.00～1.701.00～1.70Si0.17～0.370.17～0.370.17～0.370.17～0.370.17～0.370.17～0.370.10～1.600.10～1.600.10～1.600.10～1.60
0.550.550.550.550.550.550.550.550.550.550.550.550.550.55Mn～1.80～1.80～1.80～1.80～1.80～1.800.550.550.550.55
0.0250.0250.0450.0450.30.040.040.30.0350.0350.30.030.030.30.0250.0250.30.0450.0450.40.040.040.40.0350.0350.40.030.030.40.0250.0250.40.0350.0350.70.030.030.70.030.03
0.7
化学成分(%)PSCr
≤0.0350.0350.30.0350.0350.30.0350.0350.30.0350.0350.30.0350.0350.30.0350.0350.3
0.040.040.0350.0350.030.030.025
0.025
1.401.401.401.401.401.40GB/T1591Q345A0.2GB/T1591Q390B0.2GB/T1591Q390C0.2GB/T1591Q390D0.2GB/T1591Q390E0.2GB/T1591Q420A0.2GB/T1591Q420B0.2GB/T1591Q420C0.2GB/T1591Q420D0.18GB/T1591Q420E0.18GB/T1591Q460C0.2GB/T1591Q460D0.2GB/T1591Q460E0.24、合金机构钢牌号及化学成分
（1）、锰合金机构钢牌号及化学成分：执行标准
牌号
C
GB/T307720Mn20.17～0.24GB/T307730Mn20.27～0.34GB/T307735Mn20.32～0.39GB/T307740Mn20.37～0.44GB/T307745Mn20.42～0.49GB/T307750Mn20.47～0.55（2）、锰钒合金结构钢牌号及化学成分：执行标准
牌号
C
GB/T307720MnV1.70～0.24（3）、硅锰合金结构钢牌号及化学成分
0.10～1.600.10～1.600.10～1.600.10～1.600.10～1.601.00～1.701.00～1.701.00～1.701.00～1.701.00～1.701.00～1.701.00～1.701.00～1.70Si0.17～0.370.17～0.370.17～0.370.17～0.370.17～0.370.17～0.37
Si1.70～0.37
0.550.550.550.550.550.550.550.550.550.550.550.550.55Mn～1.80～1.80～1.80～1.80～1.80～1.80
Mn～1.60
0.0450.0450.040.040.0350.0350.030.030.0250.0250.0450.0450.040.040.0350.0350.030.030.0250.0250.0350.0350.030.030.030.03化学成分(%)PS0.0350.0350.0350.0350.0350.0350.0350.0350.0350.0350.035
0.035
化学成分(%)
PS
≤0.035
0.035
0.30.30.30.30.30.40.40.40.40.40.70.70.7
Cr≤0.30.30.30.30.30.3
Cr0.3
1.401.401.401.401.401.401.30化学成分(%)
执行标准牌号
CSiGB/T307727SiMn0.24～0.321.10～1.40GB/T307735SiMn0.32～0.401.10～1.40GB/T307742SiMn0.39～0.451.10～1.40
（4）、硅锰钼矾合金结构钢牌号及化学成分执行标准
牌号
C
Si
Mn
GB/T307720SiMn2MoV0.17～0.230.90～1.202.20～2.60GB/T307825SiMn3MoV0.22～0.280.90～1.202.20～2.60GB/T3078 37SiMn3MoV 0.33～0.39 0.90～1.20 1.60～1.90 0.035 0.035 0.3 0.3 0.3 0.40～0.50 0.05～0.12(5)、硼合金结构钢牌号及化学成分：
执行标准牌号CSi
MnGB/T307740B0.37～0.440.17～0.370.60～0.90GB/T307745B0.42～0.490.17～0.370.60～0.90GB/T307750B0.47～0.550.17～0.370.60～0.90（6）、锰硼合金结构钢牌号及化学成分：
执行标准牌号CSi
MnGB/T307740MnB0.37～0.440.17～0.371.10～1.40GB/T307745MnB0.42～0.490.17～0.371.10～1.40(7)、锰钼合金结构钢牌号及化学成分：
执行标准牌号CSi
MnMn1.10～1.401.10～1.401.10～1.40
P≤
0.0350.035P≤
0.0350.0350.035P≤
0.0350.035P≤
P
S
≤
0.0350.0350.0350.0350.035
0.035
化学成分(%)S
Cr0.0350.30.0350.3
化学成分(%)
SCr
0.0350.30.0350.30.0350.3化学成分(%)
SCr
0.0350.30.0350.3化学成分(%)
SCr
钢牌号及化学成分
