【Daily Question】【AC Version for Static Equipment...Question 189】July 8, 2019 Multiple-choice questions...Fill-in-the-blank questions

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bg15.jpg【Daily Question】【AC Version for Static Equipment...Question 189】 July 8, 2019 Multiple-choice questions...Fill-in-the-blank questions...........................................................................Reward rules: 3 wealth points for participation, 5–10 wealth points for correct answers. ...........................................................................The microstructure of Q345R in the hot-rolled state is ( ). For Q245R steel plates used in shells in GB150-2011 with a thickness greater than ( ) mm, they should be used in the normalized state. ...........................................................................Answer: Ferrite plus pearlite ； 36. Extension: According to GB150.2-2011, page 42, section 4.1.4b), steel plates of Q245R and Q345R used for shells with a thickness greater than 36 mm should be used in the normalized state ； For use in housings, as specified in 1) of 6.2.2 on page 55 of HG20581/T-2011, Q245R and Q345R steel plates with a thickness greater than 30 mm, and Q370R steel plates with a thickness greater than 16 mm, should be used in the normalized state.