作业帮含碳0.206,含锰0.57,含钒98.99,屈服强度355.402,抗拉强度509.733,伸长率19.72%,该Q345B钢板合格吗.
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/28 21:30:12
含碳0.206,含锰0.57,含钒98.99,屈服强度355.402,抗拉强度509.733,伸长率19.72%,该Q345B钢板合格吗.
含碳0.206,含锰0.57,含钒98.99,屈服强度355.402,抗拉强度509.733,伸长率19.72%,该Q345B钢板合格吗.
含碳0.206,含锰0.57,含钒98.99,屈服强度355.402,抗拉强度509.733,伸长率19.72%,该Q345B钢板合格吗.
Q345化学成分：
Q345A：C≤0.20,Mn ≤1.70,Si≤0.50,P≤0.035,S≤0.035；
Q345B：C≤0.20,Mn ≤1.70,Si≤0.50,P≤0.035,S≤0.035；
Q345C：C≤0.20,Mn ≤1.70,Si≤0.50,P≤0.030,S≤0.030,Al≥0.015；
Q345D：C≤0.18,Mn ≤1.70,Si≤0.50,P≤0.030,S≤0.025,Al≥0.015；
Q345E：C≤0.18,Mn ≤1.70,Si≤0.50,P≤0.025,S≤0.020,Al≥0.015；
Q345A、B、C、D、E均含Nb≤0.07,V≤0.15,Ti≤0.20,Cr≤0.30,Ni≤0.012,Mo≤0.10.
Q345的屈服强度下限为345MPa
抗拉强度：490-675
伸长率：≥21
严格的说,不合格