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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