Aluminum scrap grading is the foundation of transparent pricing, buyer confidence, and efficient recycling. Terms like Taint/Tabor, Tense, Twitch, and Drone are not just industry jargon they are internationally recognized classifications that define material quality, contamination levels, and end-use suitability.
For scrap yards, recyclers, exporters, and manufacturers, understanding these grades is essential to avoid rejections, price disputes, and compliance issues.
Why Aluminum Scrap Grades Matter
Standardized aluminum scrap grades:
- Ensure consistent buyer expectations
- Enable fair and transparent pricing
- Reduce contamination risks
- Support export and compliance requirements
- Improve recycling yield and recovery
These grades are widely referenced across global scrap markets and secondary aluminum production.
1. Taint / Tabor – Mixed Aluminum Scrap
Taint/Tabor is the most common mixed aluminum scrap grade.
Characteristics:
- Mixed cast and wrought aluminum
- May include painted or coated material
- Free from excessive dirt, oil, or non-metal contamination
- No sealed containers or hazardous materials
Common Sources:
- Demolition aluminum
- Building materials
- Auto dismantling scrap
- Mixed industrial aluminum
Buyer Use: Secondary smelting and alloy blending
Value Level: Medium
2. Tense – Clean Cast Aluminum Scrap
Tense refers specifically to clean aluminum cast scrap.
Characteristics:
- Cast aluminum only
- Free from iron, plastics, rubber, and excessive oil
- No mixed wrought aluminum
Common Sources:
- Engine blocks
- Gear housings
- Machinery parts
- Automotive cast components
Buyer Use: Foundries and casting operations
Value Level: Medium to High
3. Twitch – Clean Aluminum Extrusion Scrap
Twitch is a premium-grade aluminum scrap consisting mainly of wrought aluminum.
Characteristics:
- Minimum 90–95% wrought aluminum
- Low iron and contamination content
- May include painted extrusions
- No cast aluminum
Common Sources:
- Window and door frames
- Structural extrusions
- Manufacturing offcuts
Buyer Use: Extrusion mills and billet producers
Value Level: High
4. Drone – Aluminum Wire Scrap
Drone refers to clean aluminum wire scrap.
Characteristics:
- Aluminum conductors and cables
- Low contamination
- Minimal steel reinforcement
- Often insulated or bare
Common Sources:
- Electrical cables
- Power transmission lines
- Industrial wiring systems
Buyer Use: Electrical and conductor manufacturing
Value Level: High (depending on cleanliness)
Comparison Table – Aluminum Scrap Grades
| Grade | Type | Cleanliness | Typical Use |
|---|---|---|---|
| Taint/Tabor | Mixed aluminum | Medium | Secondary smelting |
| Tense | Cast aluminum | High | Foundries |
| Twitch | Wrought/extrusions | Very High | Billet & extrusion |
| Drone | Aluminum wire | High | Electrical manufacturing |
Common Grading Mistakes to Avoid
- Mixing cast and wrought aluminum
- Leaving steel fasteners attached
- Excess oil or moisture
- Including sealed or pressurized items
- Incorrect labeling during export
Proper segregation protects pricing and buyer trust.
FAQs – Aluminum Scrap Grades
Q: Can painted aluminum still qualify as Twitch?
Yes, if it meets minimum wrought aluminum content and contamination limits.
Q: Is Taint the same as Tabor?
Yes. The terms are used interchangeably for mixed aluminum scrap.
Q: Why do buyers reject aluminum loads?
Most rejections occur due to contamination, moisture, or incorrect grading.
Q: Does grading affect export approval?
Yes. Correct grading is critical for export compliance and documentation.
Trade Graded Aluminum Through Scrap Trade
Scrap Trade enables buyers and sellers to trade aluminum scrap by verified grade, ensuring pricing accuracy and reduced disputes.
The platform is operated by MOBEIUS TECHNOLOGIES PTY LTD, reinforcing trust, compliance, and enterprise-level scrap trading standards.
Corporate & Compliance Credentials
- Australian Registered Company
- ABN: 49 693 656 932
- ACN: 693 656 932
- Australian Business Registration compliant
- Secure platform infrastructure
- Privacy-compliant operations
- Global marketplace accessibility
This framework supports domestic and international aluminum scrap transactions.
Internal Resources
- https://scrap.trade/the-complete-guide-to-scrap-trade/
- https://scrap.trade/guide-to-scrap-metal-prices-by-scrap-trade/
- https://scrap.trade/scrap-trade-organisation/
Start Trading Aluminum Scrap by Grade
Access verified buyers and transparent grading standards by registering here:
https://scraptrade.com.au/register
Conclusion – Correct Grading Protects Value
Understanding aluminum scrap grades like Taint/Tabor, Tense, Twitch, and Drone is essential for profitable, compliant recycling. Accurate grading protects margins, speeds transactions, and builds long-term buyer trust.
When traded through a verified digital marketplace, aluminum scrap grading becomes a competitive advantage not a risk.