We as schoolboys stamping and forming GmbH + Co.KG working since 1846 as a supplier of metal processing.

Finished and supply parts from various materials for industry and trade.
Our product range extends from single pieces to medium series.

Our manufacturing capabilities include:

• CNC manufacturing to ᴓ 600 mm
• high volume turned parts up to 24 mm ᴓ
• own tool
• Die cutting to 110 to
• Welding TIG / MAG / Alu
• individual trolley systems
• Special Fittings

We produce all kinds of fittings, stamping parts, stamping parts tool Falling or inlays in several steps. Also done in-house milling and turning as well as tool for the subsequent series production. We are happy to provide advice and practical help and guide you from the development to the finished part.

We specialize in thermal protection tubes, thermowells, static mixers, pressure vessels, heat exchangers and tube coolers. We have an approval acc. ASME Section VIII Div.1 (Certificate No .: 54.838 - 27.03.2018) and are accordingly approved Stamp-Holder. Likewise, we are approved manufacturer for defense technology products acc. DIN 2303 and are approved for the manufacture of pressure equipment cat. II module A.

We have been developing and producing highly complex tube fittings for automobiles for 30 years. Together with our customers, we manufacture individual product solutions for sunroofs, convertible systems or cooling and injection systems that are innovative, reliable and safe.

Precision is our guiding principle. It is the engine that drives our employees. It is embodied in every single component that leaves our factory. Quality is our top priority. It is guaranteed by the use of the latest technologies and constant process control and optimization by our 170 qualified employees.

The company SGN-STEEL GmbH has been damaged since the year 2000 with metalworking, production of pipe flanges and sales. The aim is to produce pipe flanges of excellent quality. Some products from the product range: flat flanges, loose flanges, threaded flanges, Ansi flanges, blind flanges, assembly of intermediate piece, tube bundle walls, spiral flanges, manhole, trunk flanges, etc.
Some products from the special flanges product range. Any shape, thickness, of all types according to drawings even with different bores, threaded connections with metric, pipe or NPT thread up to DN 2000.
Version: with natural, galvanized or hot-dip galvanized surface.

Siera has refined skills in processing metal tubes and in providing customized workings.
We are spelialized in:
- Pipe bending
- Pipe forming
- Flange bending, profile bending
- Inert gas shielded arc welding (MIG/MAG)
- Inert gas shielded arc welding (TIG)
- Manual electrode welding
- Robot welding
- Stud welding
- Sawing
- Turning
- Milling

We realize on tubes, sheets, section bars and drawn products several metal processes and treatments such as bending, welding, turning, cutting, flowdrilling, satinizing, etc., also on tubes with small diametre.

We produce components and accessories (for example handles, knobs, legs for tables, tubular benches) for furnishing, shipping industry, cycling and other industries.

We work on drawing or sample.

Laser cutting work in contract work or with material as desired, thereby extending the delivery time.
Regional as well as Germany-wide Austria and Switzerland.
The cutting result will be best if a dxf file is provided. Revision of the drawing by Autocat is also possible for a surcharge. Delivery and pickup by freight carrier is no problem.

Metal furniture production for Medicine industry, Subcontracting jobs in Sheet metal production from Stainless steel and Zn coated materials, cooperation with building companies in Aluminum facade’s, glazed PVC, Al and Mild steel constructions.
Non standart Sheet metal production and Metal furniture – small quantities, special sizes, shapes and colors, everything according to customer request. Starting from engineering and drawing up to ready product. Our main advantage is European quality product made by modern technologies still keeping competitive subcontracting or end customer price level.