What is the Q890D steel?

GB/T 16270 Q890D steel is a high-strength structural steel. Due to the delivery state quenched and tempered, it is also called quenched and tempered high-strength steel. "Q" means yield, "890" means yield value (Q) is 890, and "D" means grade.

Q890D steel plate is used to manufacture coal mine hydraulic supports, heavy vehicles, engineering machinery and other steel structures that require good weldability. For example, drilling rigs, electric shovels, electric wheel dump trucks, mining trucks, excavators, loaders, bulldozers, various cranes, coal mine hydraulic supports and other structural parts used in mines and various engineering constructions are used in quenched and tempered high-strength steel. Low carbon equivalent composition design, Q890D steel plate has good welding performance; shot blasting treatment before quenching of steel plate, heating of radiant tube of quenching furnace, non-oxidizing atmosphere control and other measures, so that steel plate has good surface quality; The special roller table design of the quenching machine and the partitioned water supply cooling ensure uniform mechanical properties and good plate shape.