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

ASTM
class
IEC class Waelzholz-
varnish type
Color Thickness
per side
Continuous thermal
resistance
under air
Annealing resistance
under inert gas
Surface
resistance Ω
Chemical
resistance
Weldability
[µm] IEC 60404-12 [°C] IEC 60404-12 [°C] ASTM 717 [Ω • cm2/lam] DIN 8944 SEP 1210
C-3 EC-3 PH3 golden yellow 1 - 7 180 10 - 200 resistant
PE75W (Backlack) transparent 3 - 6 180
PE49 (Backlack) transparent 3 - 6 180
C-5 EC-5 AN50 transparent 0.5 - 1.5 210 600 5 - 10 resistant
AN50 S transparent 0.5 - 1.5 210 600 5 - 50 resistant ● ●
AN50 V grey 0.5 - 5 210 800 > 50 resistant
AN8 grey 1 - 4 270 600 20 - 200 resistant
C-6 EC-6 PH2 grey 2 - 7 180 500 > 10.000 resistant
PH2 FF grey 2 - 7 180 500 > 10.000 resistant
PH20 grey 1 - 3 180 500 > 10.000 resistant
PH21 grey 2 - 7 180 500 > 10.000 resistant

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