What are the properties of Q690E alloy?

Q690E alloy steel is a kind of pearlitic heat-resistant steel. It has high structural stability and thermal strength during long-term use at high temperatures. Q690E alloy has low overheating sensitivity during heat treatment and has no tendency to temper brittleness. This steel has high plasticity during cold deformation and can The machinability is good; the weldability is average, but the wall thickness parts need to be preheated to 200～300℃, and stress relief treatment is required after welding. This kind of steel is usually used under high temperature normalizing and high temperature tempering, and the service temperature is -40～560℃. This steel is mainly used in steam turbines for main steam pipes with steam parameters up to 540℃, turning guide vane ring, steam turbine baffle, baffle outer ring and various superheater tubes, ducts and corresponding forgings with tube wall temperature ≤570℃ .

Q690E alloy steel is mainly used in steam turbines for main steam pipes with steam parameters up to 540℃, turning guide vane ring, steam turbine baffle, baffle outer ring and various superheater tubes, ducts and corresponding forgings with tube wall temperature ≤570℃ .