Q620D steel plate is quenched and tempered high-strength steel plate. Q indicates the yield of the steel plate, and 620 indicates that the yield strength of the steel plate is not less than 620MPa. C/D/E/F means impact temperature, D means impact temperature is -20℃.
Chemical composition of Q620D steel plate
C: ≤0.20
Si: ≤0.80
Mn: ≤1.70
P: ≤0.025
S: ≤0.015
Cu: ≤0.50
Nb: ≤0.06
V: ≤0.12
B: ≤0.005
Mo: ≤0.70
Cr: ≤1.50
Ni:≤2.00
Ti: ≤0.65
Mechanical properties of Q620D steel plate
Tensile strength σb (MPa): ≥985(100)
Yield strength σs (MPa): ≥835(85)
Elongation δ5 (%): ≥12
Reduction of area ψ (%): ≥45
Impact energy Akv (J): ≥63
Impact toughness value αkv (J/cm): ≥78(8)
Hardness: ≤229HB
The implementation standard of Q620D steel plate is GB/T16270-2009 standard.
The delivery state of Q620D steel plate is quenched and tempered (quenching and tempering), and the delivery state can also be specified according to technical requirements.
