Q345B is a low-Alloy steel plate, hot-rolled in the delivery state, and implements the GB/T3274-2017 standard, GB/T3274-2017 is the production standard for carbon structural steel and alloy structural steel hot-rolled steel plates and strips, GB/T3274-2017 standard Obsolete in 2018, distinguishing between low alloy steel and carbon structural steel.
Q345B steel plate implements the new standard GB/T1591 steel plate and steel strip production standard. After the Q345B standard is updated, the steel plate grade is changed to Q355B. Q355B steel plate is also called 16Mn before Q345B. Q345B steel plate is a killed steel produced by converter or electric furnace, and its thickness is 8mm-700mm Among them, there are large welded structural parts and common steel plate grades for mechanical equipment parts.
Delivery status of Q345B steel plate: hot rolling, annealing, normalizing, controlled rolling, normalizing rolling, TMCP The default delivery status is hot rolling delivery.
Q345B steel plate is a low-alloy steel plate with a yield strength greater than or equal to 345MPa. Q345B steel plate has high toughness, good cutting performance, easy welding, and is often used in the manufacture of mechanical equipment, such as construction machinery, hydraulic machinery, lifting equipment, reducers, Q345B steel plates such as mining machinery and vehicles can also be used in the manufacture of atmospheric pressure vessels, steel structure buildings and non-special wear-resistant parts.
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