S690QL ultra high strength steel – EN 10025

S690QL is a high strength quenched and tempered steel grade that complies to steel specification EN 10025. The designation S690QL refers to a minimum yield strength of 690 MPa.

The combination of good availability and pricing and high strength combined with ease of fabrication has made S690QL steel plate a popular grade for both mobile applications such as cranes and lifting equipment and fixed steel structures. The high strength nature of this steel means that structures can be designed lighter and for mobile application this means increase in payload and operational efficiency.

Typical chemical composition of S690QL % Max

C

SI

Mn

P

S

N

B Cr Cu Mo Nb Ni Ti V Zr
0.2 0.80 1.70 0.025 0.015 0.015 0.005 1.50 0.50 0.70 0.06 2.0 0.05 0.12 0.15

 

Mechanical Properties of S690QL
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

at 0°C

at -20°C

at -40°C

at -60°C

S690QL Longitudinal 50J 40J 30J
S690QL Transverse 35J 30J 27J

 

Call 01902 712 360 for for full specifications and availability of S690QL.

High Strength Quenched and Tempered Steel Plate, High Yield Quenched and Tempered Steel Plate, High Strength Structural Steel Plate, High Yield Structural Steel Plate, High Strength Low Alloy Steel Plate, HSLA