The difference between Q345GJC construction steel plate and ordinary low alloy Q345B plate

Q345GJC construction steel is used in construction. Z-direction performance Q345GJC-Z15/Q345GJC-Z25/Q345GJC-Z35 can be added according to customer requirements.

Q345B is a kind of steel material. It is a carbon alloy steel (C<0.2%) with good comprehensive properties, good low temperature performance, good cold stamping performance, good welding performance and machinability. Q345B plate is widely used in bridges, vehicles, ships, buildings, pressure vessels, etc. Q represents the yield of this material, and 345 in the back refers to the yield value of this material, which is around 345MPa. And will decrease the yield value as the thickness of the material increases.

Q345B steel plate can be used in hot-rolled and air-cooled state, mainly used in the manufacture of bridges, ships, vehicles, boilers, high-pressure vessels, large steel structures, etc.

According to the latest national low alloy standards, Q355B replaces Q345B steel plate.

Q345GJC construction steel plate has the properties of easy welding, earthquake resistance, low temperature impact resistance and so on. It is mainly used in large-span stadiums, airports, convention and exhibition centers, etc.