20GK075 Grain-Oriented Electrical Steel — 0.20 mm, 0.75 W/kg
20GK075: what it is and where it belongs
20GK075 balances an ultra-thin 0.20 mm gauge with a moderate 0.75 W/kg loss tier. It suits designs where the enclosure footprint is already fixed and the remaining problem is heat: thinner laminations stack into a more compact core with a lower temperature rise, which matters most in dry-type units and sealed enclosures.
Typical applications
Grade 1 dry-type transformers
Export projects to IEC and EN specifications
Sealed or compact enclosures with limited heat rejection
Units with a fixed footprint and a loss target
Selection and processing notes
Thin gauge demands accurate slitting and stacking — supply as pre-slit strip where possible.
0.23 mm 23GK075 offers the same loss tier with far easier processing if the line is not thin-gauge ready.
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: B20P075. Buyers specifying to IEC or ASTM may treat this grade as the 0.20 mm, 0.75 W/kg tier; the equivalence sheet is supplied with the quotation so the substitution can be written into the purchase order without ambiguity.
