Q345R is low-alloy manganese pressure vessel steel under GB 713, with minimum yield strength 345 MPa, the mainstream high-strength vessel plate for medium and high-pressure industrial equipment. Higher manganese content than Q245R significantly improves tensile strength and low-temperature toughness, suitable for thicker wall pressure components with heavy load requirements.
Strict chemical composition limits harmful trace elements, and its carbon equivalent is controlled for easy on-site welding without complex preheating for medium thickness plates. Mechanical properties deliver tensile strength 470–630 MPa, meeting design standards for large-volume fixed roof tanks, floating roof tanks and chemical reactors operated under variable pressure conditions.
It is the most popular domestic vessel steel exported globally, widely adopted in oil storage, liquefied gas separation equipment, power station deaerators and mining processing pressure containers. Contractors from Saudi Arabia, UAE, Indonesia and Brazil prefer Q345R for large-scale tank farm projects due to stable supply and competitive factory price. We offer customized cutting, rolling and non-destructive testing services for bulk export orders.
