How to determine the allowable stress of Q345R (HIC) steel plate?
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Q345R (HIC) steel is based on Q345R with measures to control the Mn, S, and P content. The reduction in Mn content will definitely affect the strength of Q345, so my question is: How to determine the allowable stress of Q345R (HIC)? Can't you directly press Q345R to get it?
Controlling the Mn, S, and P content cannot reduce the strength of Q345...
The allowable stress is basically the same, but the application scenarios are different and the required harmful impurity content is different.
So why is the allowable stress of Q345R higher than that of Q245R?
Will the Mn content affect the strength of Q345R?
It has an impact, but it cannot be lower than the minimum allowable stress of Q345R
I always feel that the Mn content has a great influence on the allowable stress of Q345R.
I always feel that the Mn content has a great influence on the allowable stress of Q345R.
HIC steel must limit the Mn content, because too high Mn content will cause excessive MnS content, which will affect the steel plate's resistance to wet hydrogen sulfide corrosion. As for the decrease in mechanical properties caused by reducing the Mn content, the steel mill will adjust the production plan, such as the heat treatment process, so that the mechanical properties of the steel plate meet the standard requirements. No matter how the steel factory adjusts its composition and performance, the steel plates shipped from the factory must meet the standards. Its allowable stress can be selected according to the standards. Dance steel Panglong