Q690D steel plate is a national standard quenched and tempered high-strength steel plate, which belongs to the structural steel category. Q is the representation of yield strength, 690 is the minimum yield value, and D represents the grade. Q690D steel plate has higher yield strength and tensile strength.
The implementation standard of Q690D steel plate is GB/T16270-2009 standard. Q690D steel plate should be delivered in quenched and tempered state. Q690D steel plate can also be delivered according to the delivery status of some special requirements of customers, but it should be specified in the contract.
When the actual Q690D steel plate is inspected, the tensile and yield values will be slightly higher than the standard value by about 100Mpa. Q690 steel plate is widely used in the manufacture of some parts of coal mining machinery and engineering machinery, such as hydraulic supports, port cranes, and flatbed transport vehicles.
