Indian copper procurement runs on a shared vocabulary of grades borrowed from the global ISRI scrap specifications. This is the working reference our team uses on quotes.
Millberry (ISRI: Barley)
Bare, bright, unalloyed copper wire, ≥ 16 gauge. Purity 99.9% – 99.95%. Premium grade for rod mills and high-conductivity wire.
Berry (ISRI: Berry)
Clean, unalloyed, uncoated copper wire of all gauges. Slightly more variation than Millberry. Purity 99% – 99.9%.
Birch (ISRI: Birch)
Clean copper wire, may include tinned strands and light oxidation. Purity 96% – 99%. Common feedstock for ingot foundries.
Candy (Heavy Copper, ISRI: Candy)
Heavy clean unalloyed copper — bus bars, copper plates, cut tubing. Minimum 1/16 inch thick. Purity 99%+. Excellent melt yield.
Telewire copper
Copper recovered from telecom cables — typically smaller gauge, may carry insulation residue. Purity ranges from 92% – 98%.
Armature copper
Copper from motor and transformer windings — high purity but mixed with insulation lacquer and varnish. Excellent for ingot manufacturing.
Enameled copper wire
Coated winding wire — virgin or off-cut. Coating burns off in the furnace; underlying copper is high purity.
Copper ingots
Re-melted finished product, cast to specification. Parth Industries offers 99.97% purity ingots for foundries and bus-bar manufacturers.
How grades convert to price
Every grade trades at a transparent discount to LME copper cash settlement. The discount widens as purity drops, contamination rises and yield-loss in melt increases. A reliable supplier publishes the discount basis along with GST, freight and payment terms — never a flat 'rate'.