Q690E is a low alloy high-strength structural steel that is commonly used for the fabrication of heavy machinery and engineering structures that require high levels of strength and toughness. Known for its high strength and excellent fatigue resistance, this steel is particularly suitable for application scenarios where high loads and repeated stresses are applied. In the field of construction machinery, Q690E steel is widely used in the manufacture of a variety of large structural components, such as excavators, cranes, road rollers and other major load-bearing components.
The chemical composition of Q690E steel mainly includes elements such as carbon, silicon, manganese, phosphorus and sulfur. The content of these elements is precisely controlled to achieve the required high strength and excellent fatigue resistance. In addition, a certain amount of alloying elements, such as chromium, nickel, copper, etc., are usually added to further improve the performance of the steel.
Q690E steel has high yield strength and tensile strength, with standard values of ≥690MPa and ≥770MPa, respectively.This steel also has good elongation and toughness, and can maintain stable mechanical properties when subjected to high loads. In addition, Q690E steel has excellent fatigue resistance and can maintain a long service life under repeated stress.
Q690E steel is usually produced by hot rolling or normalizing rolling process. During the manufacturing process, strict quality control is required to ensure that the steel's various performance indicators meet the standard requirements. In addition, in order to further improve the performance of the steel, quenching, tempering and other heat treatment processes can also be used.
