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European standard quenched and tempered steel S690Q plate

Posted:2022-01-14 10:36:33
S690Q plate
S690Q plate is a European standard quenched and tempered high yield strength structural steel, S represents structural steel, Q represents delivery conditions, 690 is the yield value, in MPa, which can be divided into S690Q, S690Q L and S690Q L1.

S690Q steel plate delivery status: quenching + tempering.

Melting analysis of chemical composition of S690Q steel plate:
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 S690Q plate:
Thickness Mechanical properties
3-50mm ReH(MPa) ≥690
Rm(MPa) 770-940
A(%) ≥14
Impact temperature -20
Longitudinal Akv(J) ≥30
>50-100mm ReH(MPa) ≥650
Rm(MPa) 760-930
A(%) ≥14
Impact temperature -20
Longitudinal Akv(J) ≥30
>100-150mm ReH(MPa) ≥630
Rm(MPa) 710-900
A(%) ≥14
Impact temperature -20
Longitudinal Akv(J) ≥30

European standard quenched and tempered steel S690Q plate steelmaking process:
Converter / electric furnace steelmaking → LF furnace refining → VD furnace vacuum degassing → continuous casting / mold casting / electroslag → cleaning and heating → rolling → flaw detection → heat treatment → steel plate finishing → sampling → performance inspection.
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