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EN 10025-6 S620Q, S620QL and S620QL1 steel

S620Q, S620QL and S620QL1 steel are European standard quenched and tempered high yield strength structural steel, S represents structural steel, Q represents delivery conditions, 620 is yield value, unit MPa. S620Q, S620QL and S620QL1 steel equivalent grade is Q620.

Chemical composition of S620Q, S620QL and S620QL1 steel plates:

C Si Mn P S Ni Cr Mo Cu Nb V Ti N Zr B
≤0.2 ≤0.8 ≤1.7 ≤0.025 ≤0.015 ≤2 ≤1.5 ≤0.7 ≤0.5 ≤0.06 ≤0.12 ≤0.05 ≤0.015 ≤0.15 ≤0.005

Mechanical properties of S620Q, S620QL and S620QL1 steel plates:
S620QL1 steel plate thickness 3 - 50mm
ReH(MPa)≥620
Rm(MPa) 700-890
A(%)≥15
Akv (J) ≥ 30 longitudinal; Transverse: Akv ≥ 27J

S620QL1 steel plate thickness > 50 - 100mm
ReH(MPa)≥580
Rm(MPa) 700-890
A(%)≥15
Akv (J) ≥ 30 longitudinal; Transverse: Akv ≥ 27J

S620QL1 steel plate thickness > 100 - 150mm
ReH(MPa)≥560
Rm(MPa) 650-830
A(%)≥15
Akv (J) ≥ 30 longitudinal; Transverse: Akv ≥ 27J

S620Q steel impact temperature -20℃; S620QL steel impact temperature -40℃; S620QL1 steel impact temperature -60℃.

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