What material is Q420 cutting steel plate

What material is Q420 cutting steel plate?
First of all, Q420 cutting steel plate is a kind of low alloy high strength steel plate, which is used for construction and engineering structure. Q420 cutting steel plate is the steel plate with yield strength of 420 MPa, and Q is the abbreviation of yield strength.

Chemical composition of Q420 cutting steel plate: C ≤ 0.20, Si ≤ 0.50, Mn ≤ 1.70, P ≤ 0.035, S ≤ 0.035, Nb ≤ 0.07, V ≤ 0.20, Ti ≤ 0.20, Cr ≤ 0.30, Ni ≤ 0.80, Cu ≤ 0.30, N ≤ 0.015, Mo ≤ 0.20.
The mechanical properties of Q420 cutting steel plate: yield strength ≥ 340 MPa, tensile strength 500-680 MPa, elongation after fracture ≥ 18%, impact energy 34J.

Q420 cutting steel plate has good mechanical properties, weldability and good cold and hot workability. The strength and toughness of Q420 cutting steel plate are improved by adding small amount of alloying elements.

Q420 cutting steel plate is mainly used for manufacturing mining machinery, heavy vehicles, ships, bridges, medium and high pressure boilers, vessels and other large welding and structural parts.