Performance and application of Q690E steel plate

Executive standard of Q690E steel plate: GB/T16270 standard.

Q690E steel plate delivery status:
According to different requirements, normalizing+tempering or normalizing+quenching or hot rolling can also be carried out. The flaw detection requires 1 detection, 2 detection and 3 detection. The thickness Z-direction performance is as per the technical requirements of Z15, Z25 and Z35. Different delivery conditions will directly affect or change the composition performance and use of the steel plate. Therefore, the selection of technical requirements should be consistent with the current use.

Chemical composition of Q690E steel plate:
Carbon (C) ≤0.18, manganese (Mn) ≤2.00, silicon (Si) ≤0.60, phosphorus (P): ≤0.025, sulfur (S): ≤0.020, niobium (Nb): ≤0.11, vanadium (V): ≤0.12, titanium (Ti): ≤0.20, chromium (Er): ≤1.00, nickel (Ni): ≤0.80, copper (Eu): ≤0.80, nitrogen (N): ≤0.015, molybdenum (Mo): ≤0.30, boron (B): ≤0.004, aluminum (Al): ≥0.015

Mechanical properties of Q690E steel plate:
Tensile Strength σb (MPa):
Nominal thickness (mm) ≤40, tensile strength σb (MPa) 770-940 MPa
Nominal thickness (mm)>40 -63, tensile strength σb (MPa) 750-920 MPa
Nominal thickness (mm)>63 -80, tensile strength σb (MPa) 730-900 MPa

Yield Strength σs (MPa)
Nominal thickness (mm) ≤16, yield strength σs ≥690 MPa
Nominal thickness (mm)>16 - 40, yield strength σs ≥670 MPa
Nominal thickness (mm)>40 -63, yield strength σs ≥660 MPa
Nominal thickness (mm)>63 -80, yield strength σs ≥640 MPa

Use of Q690E steel plate:
Q690E steel plate is commonly used in lifting equipment, port machinery, bridge construction, steel structure, ships, pressure vessels, construction machinery, metallurgical equipment, mining machinery, hydraulic machinery, deck machinery, mining transportation equipment, large support equipment, high-rise building structures, and road machinery.