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S690QL1 - High Strength, Quenched & Tempered Fine-Grain Structural Steel |
Technical Data: -
 Data Sheet (37kb) |
Works Designation
MAXIL® 690 Q / MAXIL® 690 QL / MAXIL® 690 QL1
DIN EN S690 Q / S 690 QL / S690 QL1
Condition of Delivery
Water quenched and tempered.
Typical Applications
Heavy road vehicles: chassis, dumper bodies. Cranes construction: booms of mobile cranes. Structural
steelworks: bridges, bridge components, components for offshore structures. Pressure vessels: fixed and
transportable storage tanks, vessels. Power plants: penstocks, spiral cases. Materials handling: lifting and mobile
equipment. Mining and earthmoving equipment: roof supports. Agricultural equipment and trailers.
Chemical Composition (heat analysis, %)
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
Al |
0.20 |
0.80 |
1.70 |
0.0.20 |
0.005 |
1.50 |
0.70 |
2.0 |
0.015 |
Mechanical Properties.
Plate thickness mm |
Re MPa |
Rm MPa |
A % |
≤ 50 |
690 |
770 - 940 |
14
|
> 50 ≤ 100 |
650 |
760 - 930 |
14 |
> 100 |
630 |
710 - 900 |
14 |
Notch Impact Energy
Steel Grade |
Position of Samples |
0°C |
- 20°C |
- 40°C |
- 60°C |
S690Q/MAXIL® 690 Q |
Longitudinal Transverse |
40 J 30 J |
30 J 27 J |
||
S690QL/MAXIL® 690 QL |
Longitudinal Transverse |
50 J 35 J |
40 J 30 J |
30 J 27 J |
|
S690QL1/MAXIL® 690 QL1 |
Longitudinal Transverse |
60 J 40 J |
50 J 35 J |
40 J 30 J |
30 J 27 J |
Number of Tests
Tensile test and impact test (3 samples), every 40 t, or per heat treatment unit respectively.
Processing
High Strength Steel S690QL1
Cold-Forming
S690QL1 is suitable for cold-forming adhering to a bending or folding radius of > 4 times plate thickness longitudinal and > 3 times transverse to rolling direction. A subsequent stress relief annealing is possible up to a temperature of 580°C.
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.
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.
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.
Welding
High Strength Steel S690QL1
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.
Filler:
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 |
Full specification and details are available on request.
The above information is provided for guidance purposes only.
For specific design requirements please contact our technical sales staff.
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