What is DIN EN 10028-6 P690QH Steel Plate?

With the minimum yield strength at 690 Mpa for steel thickness equal and belows 50mm,Weldable fine grain P690QH, P690QH steel plate, and P690QH steel sheet is mainly used to manufacture liquid boilers and pressure vessels and tanks in heavy industry all over the world. For improving the steel welding properity, excessive post weld heat treatment conditions can decrease the mechanical properties. So our engineers recommended that the end user would like to add this test PWHT as an additional technical terms when they purchase boiler steel plate p690qh.