Home  PRODUCTS  Steel industry  Electrical strip  Bell annealers 

Heat treatment furnace facilities for the steel industry

HICON/H2® bell annealers for electrical strip (BAF)

HICON/H2® bell annealer facilities: the technology that revolutionized the heat treatment of steel strip coils.

Today, HICON/H2® is internationally known as a synonym for excellence in quality, productivity and lowest production costs. But it is undoubtedly the exceptional quality of steel coils annealed in 100 % hydrogen which has made HICON/H2® technology so successful.

Through intensive collaboration with partners in the industry, EBNER is able to tailor each HICON/H2® bell annealer to each customer's needs. New solutions, new products and the optimization of existing production processes are all supported.

Thanks to continual technological advances by EBNER's Research and Development Department, HICON/H2® bell annealers achieve the shortest possible annealing and cooling times while simultaneously keeping operating costs low. Customers in more than 45 countries across the globe use this technology, benefiting from its outstanding value for money and the increase in their own profitability.

The facility can be implemented to comply with the standards required by the automotive industry in accordance with CQI-9 (AIAG).


Bell annealers are used to heat treat non-grain-oriented electrical strip, both hot-rolled and cold-rolled, at temperatures between 650 and 900 °C. These processes can be grouped as follows:

Hot-rolled strip:

  • improvement of magnetic characteristics by controlling the texture (crystalline orientation)
  • material temperatures: 750 - 900 °C

Cold-rolled strip:

  • recrystallization of the microstructure of non-final-annealed electrical strip for the subsequent skin pass → activation of the material for the final anneal at the end customer
  • material temperatures: 650 - 750 °C

The following advantages are provided by the  facility design:

  • lowest dewpoints and up to 100 % hydrogen atmosphere ensure the least possible amount of surface oxidation and the best results during rolling/skin passing
  • shortest possible heating and cooling times, achieved through a combination of high convection (HICON®) and the use of 100 % hydrogen (H2) atmosphere, ensure maximum productivity
  • 100 % load-bearing surface for the coil at the bottom of the stack, paired with optimized convector plate designs, to protect the edges of the strip → this reduces the likelihood of strip breakage and scrap in downstream production steps
  • low energy consumption and low maintenance requirements due to refined design and high-quality manufacturing

Bell annealer for steel strip

bell annealer facility
Bell annealer facility for electrical strip

Copyright ©2018 by EBNER member of AUSTRIAN CHAMBER OF COMMERCE

Industrieofenbau GmbH

Bearer of the
Austrian State Coat of Arms

Industrieofenbau - Bearer of the Austrian State Coat of Arms

Copyright ©2018 by EBNER member of AUSTRIAN CHAMBER OF COMMERCE