Why Copper Grading Matters for Sellers
Copper is the most valuable common scrap metal in India, fetching ₹550–750 per kg depending on grade and purity. Yet most household sellers leave money on the table because they sell mixed copper at the lowest grade rate. Understanding how dealers grade copper — and sorting your material before selling — can increase your payout by 20–40%.
Indian scrap dealers follow a grading system loosely based on international ISRI standards, adapted for local market conditions. The key differentiator is always purity: how much actual copper content is in the material versus insulation, solder, tin coating, or other contaminants.
The Main Copper Grades in India
1. Millberry (Bright Bare Copper) — ₹700–750/kg
This is the highest grade. Millberry consists of clean, uncoated, unalloyed copper wire with a minimum 99% copper content. It should have a bright, shiny appearance — hence the name "bright copper." Sources include stripped electrical wiring (12-gauge and thicker), clean copper bus bars, and commutator segments. If your copper wire is clean and bright with no green oxidation, it qualifies as Millberry.
2. #1 Copper (Berry/Candy) — ₹650–700/kg
This grade includes clean copper tubing, pipe, and wire that may have minor oxidation but no solder, paint, or insulation. Copper from AC refrigerant lines (after removing the flare nuts), clean plumbing pipes, and lightly oxidized wire falls here. The minimum copper content is 96%. Most household copper ends up in this grade.
3. #2 Copper — ₹550–630/kg
This is the catch-all grade for copper with impurities. Soldered copper pipe, copper with paint or coating, thinly insulated wire (where insulation is less than the copper weight), and oxidized or corroded copper all go here. Recovery rate is typically 94–96% copper.
4. Insulated Copper Wire — ₹250–450/kg
Priced based on copper recovery percentage. Thick-gauge wire with thin insulation (like Romex house wire) fetches more because 65–75% of the weight is copper. Thin communication wire or data cables may only be 30–40% copper and are priced accordingly. Some dealers buy by weight and strip in-house; others price based on visual estimation of copper percentage.
Five Tests to Grade Your Copper at Home
The Magnet Test
Pure copper is non-magnetic. If a magnet sticks, the item is either copper-plated steel or a copper alloy with significant iron content. This is the most important first test — it immediately separates genuine copper from look-alikes.
The Color Test
Fresh copper is salmon-pink. Aged copper turns reddish-brown, then dark brown, then green (verdigris). Light oxidation (brown) is fine for #1 grade. Heavy green patina means #2 grade. If the core color when you scratch the surface is bright pink-orange, you have good copper.
The Weight Test
Copper is heavy — 8.96 g/cm³, nearly three times heavier than aluminum. Pick up the piece: if it feels surprisingly heavy for its size, it's likely genuine copper. Brass (a copper-zinc alloy) is similarly heavy but has a distinctly yellow tone rather than pink-red.
The Spark Test
When struck against a grinding wheel, copper produces no sparks (unlike steel or iron). If you see sparks, the material contains ferrous metal.
The Sound Test
Strike the copper piece against a hard surface. Pure copper produces a deep, soft thud. Brass rings with a higher pitch. Steel clangs. This test helps distinguish copper from brass when color is ambiguous.
Maximizing Your Copper Scrap Value
Strip insulation from thick wire. A 30-minute effort stripping insulation from a bundle of Romex wire can increase its value from ₹350/kg (insulated) to ₹680/kg (bare) — nearly double. Use a wire stripping tool (₹200–500 on Amazon) for efficiency.
Separate by grade. Never mix Millberry with #2 copper. Dealers will grade the entire lot at the lowest grade present. Keep separate bags for bright copper, oxidized copper, and insulated wire.
Remove fittings and solder. Brass fittings on copper pipe downgrade the entire piece to #2 or even mixed metal. Spend five minutes removing fittings and your copper pipe goes from ₹560 to ₹680/kg.
Clean before selling. A quick rinse to remove dust and dirt won't upgrade the grade, but dealers appreciate clean material and may offer a small premium for well-sorted, clean lots.
Sell in bulk. Accumulate at least 5–10 kg before selling. Dealers offer better per-kg rates for larger quantities because their transaction cost per kilo drops.
Where to Sell Copper Scrap
Check current copper scrap rates for your city on ScrapRates.in before approaching dealers. Having the market rate in hand gives you negotiating leverage. Compare offers from at least 2–3 verified dealers, and always insist on digital weighing in your presence.