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GBT 1591 Q345C HSLA structural steel plates steel plate

GBT 1591 Q345C HSLA structural steel plates have good comprehensive mechanical properties, low temperature performance and good plasticity and weldability. Q345C steel plates are used as raw materials for medium and low pressure vessel, oil tank, vehicle, crane, mining machinery, power station, bridge and other structures, mechanical parts, building structures, general metal structures, etc.

GBT 1591 Q345C HSLA structural steel plates chemical composition and mechanical property:

Grade C % Si % Mn P % S %  
Q345C ≤ 0.20 ≤ 0.55 1.00-1.60 ≤ 0.035 ≤0.035
Grade Thickness Yield Strength (Mpa) Tensile Strength Elongation Impact Energy
(mm) (MPa) (%) Min
Q345C ≤ 16 345 470-630 22 0 34J
  >16-35 325 470-630 22 0 34J
  >35 295 470-630 22 0 34J
The min impact energy is longitudinal energy

GBT 1591 Q345C HSLA structural steel plates are added with V、Ti、Nb microalloying elements. Those elements can refine grain, improve the toughness and comprehensive mechanical properties of Q345C steel plate.

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