20GK080 Grain-Oriented Electrical Steel — 0.20 mm, 0.80 W/kg
20GK080: what it is and where it belongs
20GK080 is the entry point to the 0.20 mm family: same ultra-thin gauge, 0.80 W/kg loss. It is the grade to quote when a customer wants the compactness of thin laminations but is certifying to Grade 2 rather than Grade 1, and does not want to pay for loss headroom the design will never use.
Typical applications
Grade 2 dry-type transformers
Grade 2 oil-immersed distribution units
European and American type compact substations
Urban distribution projects with fixed enclosure sizes
Selection and processing notes
Best value when enclosure size drives the design and the loss target is Grade 2.
For Grade 1 work, step up to 20GK070 rather than trying to recover the margin in the core design.
Supply form and documentation
Supplied as master coil 900–1250 mm wide (508 mm ID, 2–5 t per coil), slit strip from approximately 100 mm at ±0.5 mm width tolerance, or cut-to-length sheets to your lamination size. Standard insulation coating is C5, with C6 heat-resistant and chrome-free options. Every shipment carries an MTC to EN 10204 3.1 stating grade, heat number, measured core loss and flux density, plus packing list and — for export — certificate of origin and a standard cross-reference sheet against IEC 60404-8-7, ASTM A876, EN 10107 and JIS C 2553.
Equivalent designations
Nearest mill equivalent: B20P080. Buyers specifying to IEC or ASTM may treat this grade as the 0.20 mm, 0.80 W/kg tier; the equivalence sheet is supplied with the quotation so the substitution can be written into the purchase order without ambiguity.
