Q345C steel composition

Q345C steel plate refers to high strength, especially in the normalizing or normalizing and tempering state, it has high comprehensive mechanical properties. Q345C steel plate is a kind of weldable low-carbon engineering structural material, which is generally produced by continuous rolling mill.

 

Chemical composition of Q345C steel:
C: ≤0.20, Si: ≤0.50, Mn: ≤1.70, P: ≤0.030, S: ≤0.030, NB: ≤0.070, V: ≤0.15, Ti: ≤0.20, Cr: ≤0.30, Ni: ≤0.50, Cu: ≤0.30, N: ≤0.012, Mo: ≤0.10

Q345C steel's carbon content is less than 0.25%, mainly relying on the solid solution of alloying elements (Mn, Si, Al, Cr, etc.), grain refinement (Nb, V, Ti, etc.), precipitation hardening (Nb, V, Ti, etc.) , Phase transformation strengthening (Mn, Si, Mo, etc.) and controlled rolling, controlled cooling and other new processes and new technologies, so that the yield strength of Q345C steel plate is σ0.2=300~800MPa, the yield ratio is 0.65~0.95. Q345C steel has very good processing formability and welding performance, as well as excellent low temperature toughness.

 

Executive standard: GB/T1591-2008, GB/T3274-2007
Product Name: Low Alloy Steel Plate
Delivery status: hot rolled or normalized + tempered, the specific delivery status is indicated in the product quality certificate.