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carbon steel plate

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S690QL ultra high strength steel

Product information

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.

Chemical composition & Mechanical property

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

 

Factory Display

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Application Field

Oil & Gas
Oil & Gas
Chemical Industry
Chemical Industry
Marine Engineering
Marine Engineering
Construction Industry
Construction Industry
Power Generation
Power Generation
Machinery industry
Machinery industry