S690QL1 Quenched and Tempered Structural Steel

EN10025 S690QL1 Extra Toughness Steel Plate

Steel Number 1.8988 - EN10025:6:2004 S690QL1 has a minimum yield strength of 690Mpa in quenched and the original source Sexual deviations and disease with Viagra tempered conditions, it has extra tough with minimum impact values lower to -60ºC.

S690QL1 is an ideal cost efficiency steel plate, you may save cost by 35 to 40 % for material and fabrication as a 33mm thickness S690QL1 steel plate can compare to a 65mm thickness S355 steel plate.

S690QL1 has been developed for high stress and extra toughness application such as marine cranes, mobile cranes, lifting arms, oil and gas jack up rigs, mining equipments, earthmoving equipments, agricultural equipments,trailers, theme park rides, bridges, deep water rescue operation equipments and where the structural design need lighter weight with increase the efficiency of equipments. There are significant benefit by using this high strength quenched and tempered steels for maximum structural performance in extreme working environments.

Other steel product for S690Mpa high yield strength such as seamless tube RHS, SHS, CHS, Elliptical, Half-Elliptical, Flat-Oval, Octagonal, Hexagonal and Triangular are available in Beverly Steel.

S690QL1 Grade Designation

• S = Structural Steel

• 690 = minimum yield strength (MPa)

• Q = Quenching & Tempering

• L1= Lower notch toughness testing temperatures to -60ºC

Condition of Delivery

Water quenched and tempered.

S690QL1 Chemical Composition

C	Si	Mn	P	S	B	Cr	Cu	Mo
0.20	0.50	1.60	0.025	0.010	0.004	1.00	0.40	0.70
Nb	Ni	V
0.06	1.50	0.08

* Please note :The manufacturer reserves the right to change the chemical composition and CEV.

S690QL1 Quenched and Tempered Structural Steel

S690QL1 CEV - Carbon Equivalent Value

CEV = C + Mn/6 + (Cr+Mo+V)/5+(Cu+Ni)/15

Steel Plate Thickness	Maximum Ladle CEV(%)
8mm to 30mm	0.43
> 30mm to 40mm	0.55
> 40mm to 100mm	0.59
> 100mm to 130mm	0.61

* Please note :The manufacturer reserves the right to change the chemical composition and CEV.

S690QL1 Mechanical Properties

Plate Thickness	Yield Strength	Tensile Strength	Elongation
MM	ReH(Mpa)	Rm(Mpa)	A5% Minimum
≤ 50	690	770~940	14
> 50 to ≤ 100	650	760~930	14
> 100	630	710~900	14

S690QL1 V Notch Impact Test

Position of Samples	0 ºC	-20 ºC	-40 ºC	-60 ºC
Longitudinal	60 Joules	50 Joules	40 Joules	30 Joules
Transverse	40 Joules	35 Joules	30 Joules	27 Joules

S690QL1 Quenched and Tempered Structural Steel

Processing of S690QL1 High Strength Steel Plate

S690QL1 Cold Forming

S690QL1 steel plate is suitable for cold-forming adhering to a bending or folding radius > 4 times steel plate thickness longitudinal and > 3 times transverse to rolling direction. A subsequent stress relief annealing is possible up to a temperature of 580 ºC (degree C).

Minimum recommended inside bending radius
Axis of bend in transverse direction 3.0t	Axis of bend in longitudinal direction 4.0t

S690QL1 Hot-Forming

Hot-forming above 580°C is possible. A subsequent quenching and tempering has to be carried out according to the conditions of delivery.

S690QL1 Milling

Drilling with cobalt-alloyed high-speed steels HSSCO. Cutting speed should be approximately 17 - 19 m/min. If HSS drills are used, cutting speed should be approximately 3 – 5 m/min.

S690QL1 Flame-Cutting

The temperature of the material should be at least RT for flame-cutting. In addition, the following preheating temperatures are recommended for certain plate thicknesses: For plate thicknesses over 40mm, preheat to 100°C and for thicknesses over 80mm, preheat to 150°C.

S690QL1 Welding

S690QL1 steel is suitable for all current welding methods. The temperature of the material should be at least RT for welding. In addition, the following preheating temperatures are recommended for certain plate thicknesses:

20mm – 40mm: 75°C

Over 40mm: 100°C

60mm and over: 150°C

These indications are standard values only, in principle, indications of SEW 088 should be adhered to.

The t 8/5 times should be between 5 and 25 s, depending on the welding technique used. Should stress relief annealing be necessary for constructional reasons, this should be done in the temperature range of 530°C-580°C

S690QL1 Quenched and Tempered Structural Steel

Welding Method	Type of Electrode
E-Hand	FOX EV 85, FOX U 100 N OK 75.75	E11018-G E11018-M	Böhler ESAB
UP	U 100-UP, NiCrMo 2,5-UP//BB24 OK Autrod 13.44/ OK Flux 10.62	EF6, F11A8-EM4-M4	Böhler ESAB
MAG	70-IG/M2 OK Autrod 13.29, OK Tubrod 14.03	ER110S-G ER100S-G, E110T-G	Böhler ESAB

Country of Origin :

Japan, Korea, China, UK, Denmark, Germany, French, Austria, Finland and Sweden.

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Please note: the technical information above is for guidance only – for exact specifications please check with our sales team.