Chemical composition and mechanical properties of Q620MC steel plate

Q620MC steel plate is a low alloy high-strength structural steel plate for general structure and engineering. The title of the steel plate consists of four parts: the Chinese phonetic alphabet Q representing the word "yield" of the yield strength, the regular lower upper yield strength value, the delivery code, and the quality grade (B, C, D, E, F).

Performance specification for Q620MC steel plate: GB/T1591.

Q620MC steel plate chemical composition:
C: ≤0.18; Si: ≤0.6; Mn: ≤2.6; P: ≤0.03; S: ≤0.03；
Nb: 0.01-0.11; V: 0.01-0.12; Ti: 0.006-0.05; Cr: ≤1.0；
Ni: ≤0.8; Cu: ≤0.8; Mo: ≤0.3; N: ≤0.015; Als: ≥0.015.

Q620MC steel plate mechanical properties:
Upper yield strength (MPa): ≥620;
Tensile strength (MPa): 710-880;
Elongation A (%): ≥15.