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    S690 European Standard Steel

    S690 Fine Grain Structural Steel Plate

    S690 structural steel plate is a high strength, quenched and tempered fine-grain structural steel. With minimum yield strength of 690 N/mm2, this grade is intended for structural applications where weight savings is important. It is a Euronorm specification designed to achieve a 100,000 KSI minimum yield point. The specification itself is comparable to some ASTM standards (i.e. A514), but it is not required to comply with exactly the same tolerances. The tolerances for S690 plates can be found in EN-10029 and EN10064.

    Typical applications include:

    • Heavy road vehicles: chassis, dumper bodies
    • Crane construction: booms for mobile cranes
    • Structural steelworks: bridge components, components for offshore structures
    • Pressure vessels: fixed and transportable storage tanks, vessels
    • Power plants: penstocks, spiral cases
    • Mining equipment: roof supports
    • Load-handling equipment and masts

    For additional information, please contact a Leeco Steel representative.

     

    Symbols used for EN 10025 - S690
    Part 6 - Flat Products of High Yield Strength Structural Steels in the Quenched and Tempered Condition
    S… Structural Steel
    690 Minimum yield strength (Reh) in Mpa up to 16mm
    …Q.. Longitudinal Charpy V-notch impacts at a temperature not lower than minus 20 Celsius
    …QL.. Longitudinal Charpy V-notch impacts at a temperature not lower than minus 40 Celsius
    …QL1.. Longitudinal Charpy V-notch impacts at a temperature not lower than minus 60 Celsius
    Additional Options
    …Z.. Grade with improved properties perpendicular to the surface
       

     

    Mechanical Properties (1MPa =
    145.03 PSI)
    Grade Yield Strength (Mpa) in Nom. Thicknesses (mm)
      >3 - <16 >16 - <50 >50 - <63 >63 - <80 >80 - <100 >100 - <150 >150 - <200 >200 - <250
    S690QL 690 min. 690 min. 650 min. 650 min. 650 min. 630 min. - -
    S690Q 690 min. 690 min. 650 min. 650 min. 650 min. 630 min. - -
    S690QL1 690 min. 690 min. 650 min. 650 min. 650 min. 630 min. - -
    Grade Tensile Strength (Mpa) in Nom. Thicknesses (mm)
      >3 - <16 >16 - <50 >50 - <63 >63 - <80 >80 - <100 >100 - <150 >150 - <200 >200 - <250
    S690QL 770 - 940 770 - 940 760 - 930 760 - 930 760 - 930 710 - 900 - -
    S690Q 770 - 940 770 - 940 760 - 930 760 - 930 760 - 930 710 - 900 - -
    S690QL1 770 - 940 770 - 940 760 - 930 760 - 930 760 - 930 710 - 900 - -

     

    Chemical Composition
    Grade Thickness (mm) C Mn P S Si Cr Ni Mo V Cu Ti Nb N B Zr
    S690QL  <150 .20 max 1.70 max .20 max .010 max .80 max 1.50 max 2.0 max .70 max .12 max .50 max .05 max .06 max .015 max .0050 max .15 max
    S690Q  <150 .20 max 1.70 max .25 max .015 max .80 max 1.50 max 2.0 max .70 max .12 max .50 max .05 max .06 max .015 max .0050 max .15 max
    S690QL1  <150 .20 max 1.70 max .20 max .010 max .80 max 1.50 max 2.0 max .70 max .12 max .50 max .05 max .06 max .015 max .0050 max .15 max

     

    Charpy V-Notch Testing
    Grade Elongation in Nom. Thicknesses (mm) Grain @ Degrees Min. Absorbed Energy
      >3 - <16 >16 - <40 >40 - <63 >63 - <80 >80 - <100 >100 - <150 >150 - <200 >200 - <250      
    S690QL 14 min (Longitudinal) 14 min (Longitudinal) 14 min (Longitudinal) 14 min (Longitudinal) 14 min (Longitudinal) 14 min (Longitudinal) - - - -40 Celsiu 30 J
    S690Q 14 min (Longitudinal) 14 min (Longitudinal) 14 min (Longitudinal) 14 min (Longitudinal) 14 min (Longitudinal) 14 min (Longitudinal) - - - -20 Celsiu 30 J
    S690QL1 14 min (Longitudinal) 14 min (Longitudinal) 14 min (Longitudinal) 14 min (Longitudinal) 14 min (Longitudinal) 14 min (Longitudinal) - - - -60 Celsiu 30 J