What is Q690E steel material

What is Q690E steel material?
Steel grade Q690E is a kind of low-alloy high-strength steel. Q690E steel material is named after its yield strength value, Q is the abbreviation of yield strength, that is, the yield strength of Q690E steel material is 690 MPa, and E indicates the impact temperature of Q690E steel material is - 40℃.

Chemical composition of Q690E steel material:
C≤0.18, Si ≤0.60, Mn ≤2.0, P ≤0.030, S≤0.025, Nb≤0.11, V≤0.12, Ti≤0.20, Cr≤1.00, Ni≤0.80, Cu≤0.80, N≤0.015, Mo≤0.30, B≤0.004, Al≤0.015.
Mechanical properties of Q690E steel material: yield strength ≥690 MPa, tensile strength 730-940 MPa, elongation after fracture ≥14%, impact energy 31J.

Application of Q690E steel material:
Q690E steel material has high strength, good plasticity and toughness, good weldability, good cold and hot properties. Q690E steel material is mainly used for manufacturing various large-scale engineering structural components and construction machinery.

With high strength and good toughness, Q690E steel material can reduce the self weight of components and meet the requirements of large-scale and lightweight engineering components and equipment under the condition of ensuring strength, stiffness and reliability.