What are the production specifications of Q345B steel plate?

Appearance of Q345B steel plate: Q345B steel plate should have an excellent appearance, and there must be no defects that are harmful to the product application, such as no plating, holes, cracks and sludge, excessive plating thickness, scratches, chromic acid stains, white rust wait.

The physical properties of Q345B steel plate:

(1) Compressive strength test. Generally speaking, only Q345B steel plate for construction, drawing and deep drawing have requirements for compressive strength characteristics. Among them, Q345B steel plate for structural use are specified with yield limit, compressive strength and elongation; for tensile use, only elongation is specified.

(2) Bending experiment: The bending experiment is a key new item considering the performance of the metal sheet. It is generally stipulated that after the Q345B steel plate is bent 180, the zinc layer on both sides of the surface cannot be removed, and the plate base must not be cracked or cracked.