The pipe material is Q235; is there a version of the valve body made of Q235 as well?
Thread Content
I encountered it twice; the first time it was a control valve, and the user specified Q235 for the valve body； The second time it was a butterfly valve and a ball valve; it was also stated that they are made of Q235 material, with welding as the method of connection ； I searched for a long time but couldn’t find a valve body made of Q235; do I need to switch to WCB instead? Can WCB be welded to Q235 pipes? Is there still a grade corresponding to Q235 that can be used as the material for the valve body? Depressed~
Refer to GB/T 12224-2015 Steel Valves – General Requirements
Users are not necessarily aware that the naming of valve materials follows the conventions used for ordinary steel; it is necessary to clarify this point with them
Any low-carbon steel can be welded
It still reflects that the manufacturers are not familiar with the standards, and their technical staff only have a superficial understanding of them
Basically, any material with a low carbon content can be welded; the key lies in the choice of welding rod. For example, WCB plus stainless steel, or STL; QT450 plus stainless steel or copper – all of these can be welded. Q235 and WCB can also be welded, and they are both low-carbon steels. It depends on the technician’s understanding of the welding materials
We can say that 235 and WCB have the same alloy composition, and welding is not an issue either; however, their standard designations are different. ================================= WCB is cast carbon steel, while the forged version of WCB is A105. What is written on the valve indicates the material of the valve body. WCB is an American grade, equivalent to ZG280-520 in China.
Yes, there are too many domestic standards, which makes things a bit complicated