Works Designation
MAXIL 690 Q / MAXIL 690 QL / MAXIL 690 QL1
DIN EN S 690 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: bridge components, components for offshore structures. Pressure vessels: fixed and transportable storage tanks, vessels. Power plants: penstocks, spiral cases. Mining equipment: roof supports etc.
Chemical Composition (Heat analysis in %)
| C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
Al |
| 0.20max. |
0.80max. |
1.70max. |
0.020max. |
0.015max. |
1.50max. |
0.70max. |
1.50max. |
0.015max. |
In addition: Ti or/and V or/and Nb.
The manufacturer reserves the right to change the chemical composition.
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 |
LongitudinalTransverse |
40 J30 J |
30 J27 J |
|
|
| S690QL |
LongitudinalTransverse |
50 J35 J |
40 J30 J |
30 J27 J |
|
| S690QL1 |
LongitudinalTransverse |
60 J40 J |
50 J35 J |
40 J30 J |
30 J27 J |
Number of Tests
Tensile test and impact test (3 samples), every 40 t, or per heat treatment unit respectively.
Processing
Cold-Forming
The steel 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
Material with temperatures under 5°C and thicknesses ≤ 40mm should be preheated to RT. Plate thicknesses > 40mm should be preheated to 100°C, 80mm and over should be preheated to 150°C.
Welding
The steel is suitable for all current welding methods. In principle, preheating is not necessary for thicknesses up to 30mm.
The following preheating temperatures are recommended:
20mm – 40mm: 75°C
Over 40mm: 100°C
60mm and over: 150°C
Material with temperatures under 5°C should be preheated to RT for plate thicknesses < 20mm. Interpass temperature should be between 150°C and 225°C. These indications are standard values only, in principle,
in accordance of SEW 088 should be adhered to.
Depending on the welding method, the t 8/5 times should be between 5 - 25 s. If stress relief annealing should be necessary for constructional reasons, it should be in the temperature range of 530°C - 580°C.
Filler:
Welding Method |
Type of Filler |
|
Manual |
FOX EV 85, FOX U 100 N DIN 8529, AWS A 5.5
OK 75.75 |
Böhler
ESAB |
UP |
U 100-UP, NiCrMo 2,5-UP//BB24 DIN 32522, AWS A 5.23
OK Autrod 13.44/OK Flux 10.62 |
Böhler
ESAB |
MAG |
70-IG/M21 AWS A 5.28
OK Autrod 13.29, OK Tubrod 14.03 |
Böhler
ESAB |
|
