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Aluminum Clip (MLC)
Mixed low copper aluminum clippings, solids, various alloys
Certification Requirements
Required certifications, standards compliance, and verification protocols.
MLC collection, sorting, quality control, copper verification, alloy assessment, packaging
Supplier must maintain active ISO 9001 certification throughout contract term
- Aluminum content: 94-99% confirmed (mixed alloy range)
- Copper content: ≤1.0% documented (CRITICAL specification; defines Taboo grade)
- Zinc content: <5% documented (7000-series acceptable)
- Magnesium content: <5% documented (5000/6000-series acceptable)
- Silicon content: <2% documented (6000-series casting alloys)
- Iron content: <1.5% confirmed (ferrous tolerance acceptable)
- Oil/coolant residue: <2% documented (typical machining waste)
- Alloy series composition: identified (1000-8000 series acceptable if Cu ≤1.0%)
- No high-copper alloys detected (2024, 7075, etc. exclusion verified)
- No brass/copper contamination identified
- Secondary smelter compatibility statement
- Complete Elemental Profile
- Critical Copper Verification (≤1.0%)
- All Elements Documented
MUST state:
- COPPER CONTENT VERIFIED ≤1.0%
- LOW-COPPER ALUMINUM MLC SPECIFICATION CONFIRMED
- TABOO GRADE COMPLIANCE VERIFIED
- Documentation Of Alloy Series Present
- Confirms No Exclusive High-Copper Alloys (2024, 7075)
- Mixed 1000-8000 Series Acceptable If Cu ≤1.0%
MUST state:
- Aluminum Mixed Low Copper Clippings
- ISRI Taboo Grade
- Al 94-99%
- Cu ≤1.0% (CRITICAL)
- mixed alloy (1000-8000 series)
- secondary smelter compatible
- Documentation Of Oil/Coolant Residue Level
- Assessment Of Machining Waste Contamination Typical Of Industrial Clippings
- Aluminum Mixed Commodity
- Industrial Material
Rejection Criteria
Conditions and thresholds that trigger immediate rejection or downgrading.
Cu >1.0%
FULL REJECTION or reclassification to higher-copper grade with -£200-300/MT penalty
- Exceeds Taboo Low-Copper Specification
- Contaminates Secondary Aluminum
- Unacceptable For Standard Mlc Processing
- Authoritative
- All Samples Tested
CRITICAL - SPECIFICATION VIOLATION (ABSOLUTE)
- Automatic Rejection Unless Reclassified To High-Copper Commodity
- -£200-300/Mt Minimum Penalty If Accepted As Degraded Material
Al <94%
Full rejection or reclassification
- Material Purity Below Mixed Alloy Specification
- Insufficient Aluminum Content
XRF spectrometry
CRITICAL - SPECIFICATION VIOLATION
- Full Lot Rejection Or Downgrading
- Significant Value Loss
2024 (Cu ~3-4%) OR 7075 (Cu ~1.6%) OR any high-copper exclusive alloy detected
FULL REJECTION or segregation required at supplier cost
- Alloys Containing >1% Copper Violate Low-Copper Specification
- Incompatible With Taboo Grade
XRF alloy fingerprinting
CRITICAL - ALLOY SPECIFICATION
- Full Lot Rejection Or Material Segregated As High-Copper Commodity
- Significant Downgrading
>0.5% visible copper/brass coloration OR reddish material apparent
FULL REJECTION
- Visual Copper/Brass Contamination Violates Specification
- Copper Unacceptable
Visual inspection + XRF confirmation
CRITICAL - CONTAMINATION
- Full Lot Rejection
- Material Segregated As Copper/Brass Scrap
Fe >1.5% OR ferrous material >2% visibly mixed in
Full rejection or segregation required
- Ferrous Tolerance Exceeded
- Secondary Smelter Concern
XRF spectrometry + magnetic test
MODERATE-CRITICAL - CONTAMINATION
- Material Downgraded Or Rejected
- Processing Adjustment Required
>1% stainless detected
Full rejection
- Non-Aluminum Contamination Violates Specification
- Incompatible With Smelting
XRF spectrometry
CRITICAL - CONTAMINATION
- Entire Lot Rejected
- Material Segregated As Mixed Metal Scrap
Cannot determine alloy series OR verify copper specification
Full rejection
- Material Identity Uncertain
- Must Be Confirmed Low-Copper Mixed Aluminum
XRF analysis with alloy library
CRITICAL - IDENTIFICATION FAILURE
- Material Rejected
- Requires Extensive Testing For Re-Identification
Oil >3% OR visible dripping oil residue
Reclassification or rejection if cleaning required
- Contamination Exceeds Acceptable Machining Waste Level
- Processing Cost Increase
Visual/olfactory assessment
MODERATE - CONTAMINATION
Material downgraded or cleaning required at supplier cost