Q345GJ Building Steel

Q345GJ is a kind of steel for building structure. The size, shape, weight and allowable deviation of steel plate should meet the requirements of GB/T 709, and the negative deviation of thickness is limited to 0.3mm.

Q345GJ Mechanical Property

Yield strength ReH/ (MPa)
Thickness 6-16 ≥345
Thickness 16-35 345-465
Thickness 35-50 335-455
Thickness 50-100 325-445
Tensile strength Rm/ (MPa): 490-610
Elongation A (%): ≥ 22
Carbon equivalent
Carbon equivalent (CE) CE(%)=C+ Mn/6 +(Cr+Mo+V)/5+(Ni+Cu)/15

Q345GJ Steel Delivery Status

The delivery status of the steel plate is: hot rolling, normalizing, normalizing rolling, normalizing + tempering, quenching + tempering or TMCP: temperature-deformation controlled rolling and controlled cooling.

Q345GJ Package

The packaging, marking and quality certificate of the steel plate shall comply with the provisions of GB∕T247.