Precision in processing

For more efficiency in processing We are fully committed to the state-of-the-art technical product properties demanded by the market. Our claim to narrow shape tolerances and processability goes much further.

voestalpine isovac® Materialvorteile

Product features according to our requirements

voestalpine isovac® Mechanische Eigenschaften & Isolation

Mechanical properties and insulation

Mechanical properties guarantee both the functionality of rotating electrical machinery and, more importantly, the processability of the steel strip. Consistent mechanical properties as well as clean surfaces that cause minimal abrasion on the punching tool are prerequisites to optimized punching processes. One possibility of reducing tool wear and improving the punching process is the application of an insulating layer on the steel surface. The layer acts as an insulator and is especially effective in providing lubricating action for the punching tool.

  • Uniform mechanical properties
  • High chemical material purity

  • Very good adhesion between the material and insulation

  • Continuous insulation thickness

  • No defects in insulation

voestalpine isovac® Geometrische Eigenschaften

Geometric properties

The result of our stable and continuous rolling process is a reduction in the steel strip thickness tolerance value. The subsequent continuous annealing makes it possible for us to reduce material stress to a minimum and manufacture components with the highest precision.

  • Narrowest tolerances in the strip in both longitudinal and cross direction for consistent package parallelism
  • No damage to slit edges and strip surfaces

  • Low stress in hot-rolled and slit strip (no strip waviness, high shape consistency)

voestalpine isovac® Sauberkeit


Consistent mechanical properties, narrowest tolerances and clean strip surfaces must be continuously guaranteed in order to allow efficient and problem-free processing. We minimize production residues as far as possible. Additionally, extremely abrasion-proof insulation coatings with good adhesion properties can be applied to the steel surface.

  • Good insulation adhesion

  • Minimum abrasion during splitting and punching

voestalpine isovac® Klebefähigkeit

Adhesive bondability

A successful adhesive bonding process is dependent on the bondability of the insulation on the steel surface. For example, Backlack is a special insulating varnish for electrical steel. The main purpose of this varnish is to bond the individual lamellas with each other and create a compact laminated core without any short circuits. The use of Backlack allows us to achieve very complex geometries.

  • Surface free from dust, oil, grease and silicon residues
  • High level of insulation adhesion,

  • optimized for full-surface bonding

  • Homogeneous adhesive bonding

  • Innovative coatings with Backlack and backlack-v®

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