s890ql1/s890ql-1/high strength/extra toughness

S890QL1 Quenched and Tempered Structural Steel

Hot forming

If the temperature of 560 °C (1040 °F) is exceeded, the initial tempering will be altered so that the mechanical properties are affected. To regain the initial properties new quenching and Chlamydia in men tempering become necessary. However, water quenching of a formed work pece or component will often be less effective than the https://farmacia-ita.com/amoxil-cap.html original quenching in the plate mill so that the fabricator may not be able to re-establish the properties required and therefore hot forming is not suitable.

Finally, it is the fabricator’s responsibility to obtain the required values of the steel through an appropriate heat treatment.

Welding and flame cutting

Due to its high yield strength, S890QL1 requires special care during plate processing.

Detailed instructions for flame cutting of the S890QL1 shall be provided.

For general welding instructions, please consult the EN 1011. In order to ensure that the tensile strength of the weld metal fulfils the melhores praias da florida requirements of the base metal, the heat input and interpass temperature must be limited during welding. Experience has shown that the welding conditions should be chosen so that the cooling time t 8/5 does not exceed 12 seconds. This is applicable when using suitable filler materials of a corresponding yield strength class.

The high yield strength of the base material must be taken into account when choosing the filler materials. It should be considered that increased heat input leads to lower tensile properties in the weld metal. If a stress relieving heat treatment is planned during or after plate processing, this must also be considered when selecting the filler materials.

To avoid hydrogen-induced cold cracking, only filler materials, which add very little hydrogen to the base metal, may be used. Therefore, shielded arc welding should be preferred. For manual arc welding,electrodes with basic coating (type HD<5 ml/100 g in accordance with ISO 3690), and dried according to the manufacturer’s instructions, should be used.

Heat treatment

If a stress relieving has to be considered because of constructional regulations, constructive reasons or because it is necessary for the fabrication, please consult us. The properties of structural components can be altered by a stress relief heat treatment.

Detailed instructions for flame cutting, welding, machining and about the structural properties of the S890QL1 are provided in the technical information upon request.

General technical delivery requirements

Unless otherwise agreed, the general technical delivery requirements in accordance with EN 10021 apply.


Unless otherwise agreed, the tolerances will be in accordance with EN 10029, with class A for thickness and table 4, steel group H, for the maximum flatness deviation. Smaller flatness deviations may be possible on request prior to order.