customized solutions for the steel processing industry
We manufacture alloy and non-alloy round steel bars, as well as we are the European market leader in the production of bars with diameters of 12 to 14 mm. Tailoring to our customers needs and premium quality distinguish our rolled and bright steel products. Our product range of more than 2500 alloys of steel enables us to provide perfectly customized solutions for specific compositions.
Our production range covers standard structural steels, quenched and tempered steels, tool steels and special steels. The manufacturing range includes black, shot-blasted, peeled and polished steel bars, as well as threaded bolts respectively chamfered, center holed and precision ground steel bars in different heat treatment conditions.
Our SAS systems feature high quality thread bars of various grades, up to prestressing steel quality, in a range of diameters from 12 to 75 mm. We provide various system solutions for a variety of technical engineering purposes, including thread bar anchors for mining and tunnelling, reinforcement connections, form ties, tie rods, soil nails, micropiles, rock and soil anchors for geotechnical applications as well as prestressing tendons for post-tensioning. Our SAS thread bar systems are used for connections, formwork and anchorages and have been installed in large-scale construction projects worldwide. Whether for building, underground, bridge or road construction, tunnelling or mining, we can supply the steel you need to get the job done. In the technical engineering sector, our SAS system products have made us the leading global supplier of hot-rolled thread bars. Providing individualized solutions for specific customer requirements is a challenge we gladly accept.
The centrepiece of our production is a 22-stand continuous small-section rolling mill in which materials of diverse grades, pre-heated up to approximately 1,200 °C in the walking beam furnace, are rolled out to diameters between 12 mm and 75 mm. Part of the material is already tempered in the rolling mill utilizing the rolling heat. After cooling and cutting, the material goes to one of our 9 finishing lines for further processing.
In the steel bar finishing lines, our SAH steel bars with diameters ranging from 12 to 40 mm are annealed, straightened, sawed, shot-blasted, chamfered and checked for surface defects. Part of the bar material is further refined by using peeling, straightening/polishing and grinding, followed by another surface check and/or ultrasonic testing. Additional production stages comprise sawing including end forming, turning, grinding, deburring and gear cutting.
Our SAS thread bars with screwable continuous coarse threads ranging from 12 mm to 75 mm in diameter are either delivered pre-assembled or undergo additional treatment processes, such as stretching followed by annealing in order to produce special grades with specific strength values. The screwability of the thread bars is checked continuously. Part of the material is subjected to further in-house processing such as bending, locking and other assembly steps, which enable us to offer our customers complete system solutions. The required accessories are also produced in-house using various gang drilling machines, whirling machines and CNC lathes.
"True to my motto “Optimize the entire value chain”, it was a very important step for me to take over and breathe new life into Annahütte in 1975. At that time, large-scale construction projects for traffic infrastructure were driving up demand for steel. My construction companys need for high-quality steel products was growing quickly. As a private family-owned company we have always striven to achieve qualitative growth. We put numerous rationalization and modernization actions into effect and started the production of high-quality steel at Annahütte. With the help of my employees, we were successful in our new start. This is a success story unlike any other in steel history. I wish Annahütte all the best for the future! Max Aicher