S690QL ultra high strength steel

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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

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