Insulating varnishes: excellent insulation and optimized stampability

Electrical steel strip coatings with a myriad of peoperties

Our wide range of insulating varnishes provides the ideal coating for every electrical steel strip application. A key aspect is the insulation between individual electrical steel strip plates. We have the perfect insulating varnish for every application – tailored to the grade of electrical steel strip, further processing requirements and final intended purpose. Stampability, corrosion protection and chemical resistance are also improved significantly. We can even adjust weldability and heat resistance according to specific requirements.

Environmentally friendly coating systems to meet any requirement

Just as with our cold rolled steel strip and electrical steel strip products – when it comes to our insulating varnishes, you can choose between one of our standard systems or one tailor made to meet your specific needs. Instead of having a strict division between organic and inorganic varnishes, our main focus of development is a combination of both substances. During research and development we always keep environmental protection at the forefront and only ever use water-soluble coating systems. Our Backlack is one of our specially developed variations.

Coating systems

IEC classWaelzholz-
varnish type
per side
Continuous thermal
under air
Annealing resistance
under inert gas
resistance Ω
[µm]IEC 60404-12 [°C]IEC 60404-12 [°C]ASTM 717 [Ω • cm2/lam]DIN 8944SEP 1210
C-3EC-3PH3golden yellow1 - 718010 - 200resistant
PE75W (Backlack)transparent3 - 6180
PE49 (Backlack)transparent3 - 6180
C-5EC-5AN50transparent0.5 - 1.52106005 - 10resistant
AN50 Stransparent0.5 - 1.52106005 - 50resistant● ●
AN50 Vgrey0.5 - 5210800> 50resistant
AN8grey1 - 427060020 - 200resistant
C-6EC-6PH2grey2 - 7180500> 10.000resistant
PH2 FFgrey2 - 7180500> 10.000resistant
PH20grey1 - 3180500> 10.000resistant
PH21grey2 - 7180500> 10.000resistant

You have any questions concerning our steel materials or would like to send us an e-mail?