27QG090 Grain-Oriented Electrical Steel — 0.27 mm, 0.90 W/kg
27QG090: what it is and where it belongs
27QG090 is the single Hi-B grade at 0.27 mm, delivering 0.90 W/kg with 1.89 T flux density. It exists for the customer who needs Grade 2 efficiency but whose line, tooling or core design is built around 0.27 mm — the thickness most Chinese distribution transformer plants are set up for.
Typical applications
Grade 2 oil-immersed distribution transformers
Energy-saving power transformers
Plants tooled for 0.27 mm cores
Medium-rating units with large core sections
Selection and processing notes
Processing is more forgiving than 0.20 or 0.23 mm, which reduces first-article risk.
If the customer can run 0.23 mm, 23GK080 delivers the same loss tier at lower material weight.
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: B27R090. Buyers specifying to IEC or ASTM may treat this grade as the 0.27 mm, 0.90 W/kg tier; the equivalence sheet is supplied with the quotation so the substitution can be written into the purchase order without ambiguity.
