We offers one of the largest ranges of high strength quenched and tempered structural steel plate in Europe. A variety of steel specifications is available including those with a minimum yield strength of 690 MPa and with a minimum yield strength of 890 MPa. The stock encompasses a range of sophisticated high strength low alloy steel plates from leading Western European producers and is supplied in plate thicknesses from 3 mm up to 300 mm.
Specifications and gradesEN 10025 S690QL, EN 10025 S890QL, EN 10025 S960QL
RQT® 701, RQT® 901
Stock size range:Thicknesses: 3 mm to 300 mm
It is possible to produce steel plates that have more than twice the strength of those produced from mild steel through a heat treatment process known as quenching and tempering. Steel is heated to a point above its upper critical temperature and is then very quickly cooled in water. This method of cooling, known as quenching, induces a transformation in the crystalline structure of the steel which leaves it much harder. Unfortunately the steel in this condition is also very brittle and it is not possible to use it in many applications. A method of heat treatment for alleviating this problem is called tempering and requires the quenched steel to be re-heated although this time to below the lower critical temperature. The result is to put toughness and ductility back in to the steel and, although some of the yield strength of the quenched steel is lost, the end result of the quenching and tempering process is to produce a strong steel which is also easy to weld, bend, and fabricate generally.
Chemical Composition – EN10025 S690QLContent % (ladle analysis), maximum
Mechanical Properties – EN10025 S690QL
Designers, engineers, and plant operators strive to reduce weight and increase the efficiency of equipment. There are significant benefits to be had by using high strength quenched and tempered steels for maximum structural performance in extreme working environments.
We often find that this type of material is called different things by different engineers. Plate to this specification and grade is variously described as:
Chemical Composition – RQT® 701 Content % (ladle analysis), maximum – plates from 8 mm to 130 mm thick
Carbon equivalent values
Mechanical Properties – RQT® 701
We find that the category of steel plate that EN 10025 S890QL falls into is called different things by different engineers. Plate of this type is variously described as:
Chemical Composition – EN10025 S890QL Content % (ladle analysis), maximum
Mechanical Properties – EN10025 S890QL