Seamless steel rings - Import export

With the ring rolling mill Siempelkamp completes its range of products for the manufacture of rings. From forging the pre-forms to manufacturing the ring blanks to ring rolling, we supply everything from a single source. Siempelkamp’s ring rolling mill manufactures seamless rings made of steel and special materials such as nickel-base, titanium, or aluminium alloys using maximum radial and axial pressing forces. The radial pressing force is hydraulically generated and applied to the part via a mandrel roll. Radial rolling is carried out by reducing the roll gap between the driven external roller and the mandrel roll. The axial pressing force is also hydraulically generated and applied to the part via the upper axial roller. Axial rolling is carried out by means of the vertical forward feed of the upper axial roller. A centring device provides for the correct position of the ring during the rolling process.

Westfälsche Drahtindustrie GmbH uses highly efficient plant technology at its Salzgitter site to produce cold-ribbed reinforcing steel (CR) in rings and coils, as well as structural steel mesh. Thanks to special wire rod primary material for our CR products, which we have developed in close cooperation with our suppliers, our reinforcing wire achieves first-class technical values, particularly in terms of elongation and the Re/Rm ratio The advantages for the user: easy processing and dimensional accuracy of the hangers. Seamless quality monitoring from the wire rod to the finished product by our own quality centre and our external monitoring centre (MPA Dortmund) guarantees the highest level of lasting quality and safety.

We have a standardised range of click rings in all types of sizes at our disposal, in materials such as titanium, zirconium (black titanium), stainless steel, carbon and cobalt chrome.

Lebronze alloys Group was born from the integration of different companies specializing in copper alloys, copper, nickel alloys, aluminium alloys, specialty steels, stainless steels, titanium and nickel superalloys. Thanks to a multidisciplinary know-how, the Group provides innovative solutions to all major industries such as Aerospace, Oil & Gas, Power, Railway but also in sectors manufacturing smaller equipment and products. Our 16 production facilities and 1,400 employees manage a unique range of metal processing technologies: continuous and semi-continuous casting, sand casting, die precision chill casting (manual, mechanized and automated), centrifugal casting, extrusion, ring rolling, hot and cold rolling, drawing, open-die forging, hot stamping, closed-die forging, cold forming, machining, non-destructive testing, etc. The Group’s commitment is to find appropriate and optimized solutions for every sector’s requirements.