Questions regarding Section 2.3 Chemical Composition of the tolerance specifications
Thread Content
2.3.1 Carbon steels and low-alloy steels used for welding 2.3.2 Carbon steels and low-alloy steels in steels specifically designed for pressure vessels Why are they divided into two categories? What is the difference between these two concepts?
For example, there are differences such as Q345B and Q345C for structural use, and Q345R for container plates
There are specific standards for steel used in pressure vessels, with more stringent requirements. The previous point refers to general-purpose materials; after all, when the pressure is low, it is not necessary to use specialized steel.