Millberry Scrap vs. Berry & Birch Copper: Complete ISRI Grade Comparison
Published on September 05, 2026 by MillberryCopper.com Trade Intelligence Desk
Key Takeaways & Summary
Learn the exact physical and chemical differences between ISRI Millberry (99.9%), Berry (96%), and Birch/Cliff (92-94%) copper scrap grades to maximize yard profits.
ISRI Grade Code Breakdown: Millberry vs. Berry
Millberry copper scrap represents the global industry benchmark for clean, unalloyed bare bright copper wire with a minimum purity of 99.9% Cu. When trading under standard ISRI specifications, buyers and refiners calculate pricing directly off live London Metal Exchange (LME) spot rates minus standard smelting and refining discounts.
Industrial processing of copper wire requires strict adherence to physical characteristics: wire diameters must exceed 1.3mm (16 Gauge B&S), with zero presence of tinned coatings, oxide tarnish, or insulation residue. International shipments through major ports like Mundra, Rotterdam, and Jebel Ali utilize 100% Irrevocable Letters of Credit (LC at sight) paired with independent SGS assay testing.
Wire Diameter and Purity Standards (>1.3mm / 16 Gauge)
Millberry copper scrap represents the global industry benchmark for clean, unalloyed bare bright copper wire with a minimum purity of 99.9% Cu. When trading under standard ISRI specifications, buyers and refiners calculate pricing directly off live London Metal Exchange (LME) spot rates minus standard smelting and refining discounts.
Industrial processing of copper wire requires strict adherence to physical characteristics: wire diameters must exceed 1.3mm (16 Gauge B&S), with zero presence of tinned coatings, oxide tarnish, or insulation residue. International shipments through major ports like Mundra, Rotterdam, and Jebel Ali utilize 100% Irrevocable Letters of Credit (LC at sight) paired with independent SGS assay testing.
Chemical Analysis: Acceptable Oxidation & Moisture Limits
Millberry copper scrap represents the global industry benchmark for clean, unalloyed bare bright copper wire with a minimum purity of 99.9% Cu. When trading under standard ISRI specifications, buyers and refiners calculate pricing directly off live London Metal Exchange (LME) spot rates minus standard smelting and refining discounts.
Industrial processing of copper wire requires strict adherence to physical characteristics: wire diameters must exceed 1.3mm (16 Gauge B&S), with zero presence of tinned coatings, oxide tarnish, or insulation residue. International shipments through major ports like Mundra, Rotterdam, and Jebel Ali utilize 100% Irrevocable Letters of Credit (LC at sight) paired with independent SGS assay testing.
How to Price Each Scrap Grade Against Spot LME Benchmarks
Millberry copper scrap represents the global industry benchmark for clean, unalloyed bare bright copper wire with a minimum purity of 99.9% Cu. When trading under standard ISRI specifications, buyers and refiners calculate pricing directly off live London Metal Exchange (LME) spot rates minus standard smelting and refining discounts.
Industrial processing of copper wire requires strict adherence to physical characteristics: wire diameters must exceed 1.3mm (16 Gauge B&S), with zero presence of tinned coatings, oxide tarnish, or insulation residue. International shipments through major ports like Mundra, Rotterdam, and Jebel Ali utilize 100% Irrevocable Letters of Credit (LC at sight) paired with independent SGS assay testing.
Trade Millberry Copper Scrap With Confidence
Connect directly with verified international scrap yards and refiners under Bank Letter of Credit (LC) and SGS assay inspection.