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S690QL

S690QL

S690 QL steel is a high yield structural steel grade produced in compliance with EN 10025:6:2004. The material is heat treated using the quench and temper process and has good bending and welding properties.

Due to the materials high strength nature, using S690QL will promote leaner designed structures with increased payload capacity and energy efficiency.

Please refer to the technical details below referring to S690QL.

S690 QL steel Grade Designation

· S = Structural Steel

· 690 = minimum yield strength (MPa)

· Q = Quenching & Tempering

· L = Low notch toughness testing temperature

S690 QL steel Chemical Composition
S = Structural Steel
690 = minimum yield strength (MPa)
Q = Quenching & Tempering
L = Low notch toughness testing temperature

S690 QL steel Chemical Composition

Grade C Si Mn P S N B Cr Cu Mo Nb* Ni Ti* V* Zr*
S690QL 0.20 0.80 1.70 0.025 0.015 0.015 0.0050 1.50 0.50 0.70 0.06 2.0 0.05 0.12 0.15

* At least 0.015% of grain-refining element present. Aluminium is also one of these elements.
S690 QL steel Mechanical Properties

Designation Mechanical Properties (ambient temperature)
Steel Name Steel Number Min. Yield Strength Reh MPa Tensile Strength Rm MPa Min. % elongation after fracture
Nominal thickness (mm) Nominal thickness (mm)
≥3 ≤50 ≥50 ≤100 ≥100 ≤150 ≥3 ≤50 ≥50 ≤100 ≥100 ≤150
S690QL 1.8931 690 650 630 770/940 760/930 710/900 14

V Notch Impact Testing

Grade Sample Orientation @ 0°C @-20°C @-40°C @-60°C
S690QL Longitudinal 50 J 40 J 30 J ––
Traverse 35 J 30 J 27 J ––

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