Boiler Vessel Plate Q245R Q345R?Q245R and Q345R are two materials commonly used in boiler vessel plates, which are important in terms of chemical composition, mechanical properties and welding
Pick upThere are differences in terms of performance and so on.
First of all, in terms of chemical composition, Q245R has a lower carbon content, usually at 017%~0.24% between.
Q345R has a higher carbon content, usually in the range of 022%~0.29% between. This makes the Q345R more powerful and.
toughness, while also making it less sensitive to embrittlement in the weld heat-affected zone.
Secondly, in terms of mechanical properties, the tensile strength and yield strength of Q345R are higher than those of Q245R. For example, the tensile strength of Q345R is usually between 400 520MPa, while the tensile strength of Q245R is usually in.
Between 370 and 490MPa. This means that the Q345R is better able to withstand heavy loads and pressures.
In addition, in terms of welding performance, due to the higher carbon content of Q345R, it has lower hardenability, so it is not welded.
Prone to cold cracks. At the same time, Q345R has relatively loose restrictions on harmful elements such as sulfur and phosphorus, making it weld joints.
Have good toughness.
Therefore, on the whole, the Q345R boiler vessel plate has higher strength, toughness and welding performance, which can be better.
Adapt to high temperature, high pressure and heavy load working environment. In contrast, the Q245R boiler vessel plate is strong and tough.
It is slightly inferior to the Q345R, but its cost is lower, and it is suitable for some occasions where strength is not required. In practice, the right boiler plate material can be selected according to the specific requirements.