Copper Wire Scrap (MILL BERRY)

 What Mill‑Berry Copper Wire Scrap Is

Mill‑Berry refers specifically to clean, unalloyed, uncoated, and untinned copper wire scrap that has been stripped of insulation and contains very high copper purity, typically 99.95%–99.99%.
It is considered the premium grade of copper scrap because it comes from unused or cleanly recovered copper wire and cable.

Key Characteristics

• Purity: 99.95%–99.99% copper
• Form: Bright, shiny, bare copper wire (usually unburnt)
• Source: Recovered from electrical wiring, cables, and manufacturing offcuts
• Condition: No insulation, no coatings, no alloys, no contamination
• Color: Bright reddish‑gold (not dark or oxidized)

 Technical Properties

Mill‑Berry copper scrap is valued because it maintains properties close to virgin copper:

• Very high electrical conductivity
• Low oxygen content
• Excellent thermal conductivity
• High ductility and plasticity
• No porosity or structural defects

 Common Industrial Uses

Due to its purity, Mill‑Berry scrap is directly reused in:

• Electrical wire & cable manufacturing
• Transformers and motors
• Electrical components and terminals
• Low‑speed wire‑cutting machines (e.g., Sodick, Makino)
• Brushes, connectors, printed circuit components

It is essentially a feedstock for producing new copper products with minimal refining.

 Packaging & Trade Format

Typical export packaging includes:

• Bulk loose in containers
• Bundles of ~200 kg or as required

 Why It’s Important in Global Trade

Mill‑Berry is the benchmark grade for copper scrap pricing worldwide.
Because of its purity, it is easy to melt and reuse, making it a critical raw material for:

• Recycling industries
• Electrical manufacturing
• Copper refineries

It is also one of the most liquid and widely traded scrap commodities.

Here’s a clear, structured, citation‑based comparison of Mill‑Berry, Birch/Cliff, and other major copper scrap grades, using the most authoritative information from the search results.
This will give you a professional, export‑ready understanding of how each grade differs in purity, appearance, contamination, and market value.

 Overview of Copper Scrap Grades

Copper scrap is classified by purity, contamination, and processing requirements. Higher purity = higher value.

Below is a detailed comparison.

 Comparison Table: Mill‑Berry vs Birch/Cliff vs Other Grades

Grade	Purity	Description	Typical Sources	Market Value Tier
Mill‑Berry (Bare Bright)	~99.95–99.99%	Bright, shiny, uncoated, unalloyed copper wire; no oxidation; highest grade	Stripped electrical wire, bus bars, clean manufacturing offcuts	Highest (95–100% of copper price)
#1 Copper	~99%	Clean copper, slight oxidation allowed; no coatings	Plumbing pipes, gutters, flashing, clean fittings	High (90–95% of copper price)
Birch/Cliff (#2 Copper)	~94–96%	Mixed copper with contamination: paint, solder, oxidation, attachments	Mixed wires, older pipes, painted/tarnished copper	Medium
#3 Copper / Low‑grade	<90%	Heavy contamination, alloys, solder, burnt wire	Burnt wire, motor windings, mixed scrap	Low
E‑scrap / PCB copper	Highly variable	Copper mixed with plastics, resins, metals	Electronics, PCBs	Very low (requires heavy processing)

Sources:

• Bare Bright and #1/#2 copper definitions and pricing tiers
• Bare Bright purity and characteristics

 1. Mill‑Berry (Bare Bright Copper)

Purity: 99%+ (often 99.95–99.99%)
Key traits:

• Bright, shiny, reddish‑orange
• No oxidation, no coatings, no insulation
• Must be unalloyed and unburnt
• Minimum thickness: 16 gauge (per industry standards)

Why it’s valuable:

• Requires almost no refining
• Highest conductivity
• Commands the top price in the scrap market (95–100% of LME copper price)

 2. #1 Copper

Purity: ~99%
Traits:

• Clean copper but may have slight oxidation
• No coatings or solder
• Includes pipes, sheets, gutters, flashing

Value:

• Slightly below Mill‑Berry
• 90–95% of copper price

 3. Birch/Cliff (#2 Copper)

Purity: ~94–96%
Traits:

• Contains contamination: paint, solder, oxidation, attachments
• Includes tarnished wire, older plumbing, mixed copper scrap

Value:

• Medium tier
• Requires more refining → lower price

4. Lower Grades (#3 Copper, Motors, E‑scrap)

Purity: <90%
Traits:

• Mixed metals, coatings, burnt wire, motor windings
• High processing cost
• Lowest value

 Practical Guidance for Traders (Ayad‑specific)

Given your operational style—high‑precision procurement, compliance, and cross‑border logistics—here’s how to use this comparison:

 When buying Mill‑Berry

• Demand visual proof of bright, unoxidized wire
• Reject burnt wire (often sold fraudulently as “Mill‑Berry”)
• Require purity certificates or spectrometer tests for large lots

 When buying Birch/Cliff

• Expect mixed quality
• Negotiate aggressively—contamination reduces melt yield
• Use it only when refinery margins justify the lower grade

 For customs & documentation

• Always specify grade clearly (e.g., “ISRI: Berry” for Mill‑Berry, “ISRI: Birch/Cliff”)
• This reduces disputes at borders and with buyers