What is Q420 steel material

What is Q420 steel material?

First of all, Q420 steel material is a kind of low-alloy high-strength steel. It is mainly used for building and engineering structures by adding a small amount of alloy elements into the steel. Q420 steel material is the steel with yield strength of 420 MPa, and Q is the abbreviation of yield strength.

Q420 steel material chemical composition: 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 steel material: yield strength ≥ 340 MPa, tensile strength 500-680 MPa, elongation after fracture ≥ 18%, impact energy 34J.

Q420 steel material has good mechanical properties and weldability, good cold and hot workability. The strength and toughness of the steel are improved by adding micro alloying elements.

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