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	Longitudinal Transverse	40 J 30 J	30 J 27 J
S690QL	Longitudinal Transverse	50 J 35 J	40 J 30 J	30 J 27 J
S690QL1	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

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