Processing of Aluminum Alloy Composition Analysis and Testing Reports
Date：2026-09-17 10:11:31 Classification
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Guide to Obtaining Aluminum Composition Analysis Reports
Aluminum composition analysis is commonly used for alloy grade verification, quality control, trade compliance, and failure analysis. Key points for the process are outlined below:
I. Common Testing Standards
National Standards (China): GB/T 3190 (Chemical composition of wrought aluminum and aluminum alloys)
International Standards: ISO 209, ASTM B221/B209
EU Standards: EN 573-3, EN 1706 (Cast aluminum)
US Standards: AA (Aluminum Association) alloy designation system
II. Selection of Testing Methods
| Method | Characteristics | Typical Application
| XRF Spectrometer | Rapid, non-destructive, semi-quantitative | Incoming material inspection, high-volume screening
| ICP-OES | High precision, capable of measuring trace elements | Precise alloy grade determination
| Chemical Titration | Arbitration-grade precision | Trade settlement, dispute resolution testing
| Direct-Reading Spectrometry | Fast, simultaneous multi-element analysis | On-site production quality control
III. Process Overview
1. Define testing purpose: Alloy grade verification, quantitative elemental analysis, impurity analysis, or RoHS compliance
2. Sample preparation: Solid block (diameter ≥20mm) or chips/turnings (≥50g); for tubes/profiles, cut a representative section
3. Select a laboratory: e.g., Dezewei Testing (CNAS Reg. No. L8083) or other labs with CMA/CNAS accreditation
4. Turnaround time: Typically 3–5 working days
5. Report contents: Elemental content, corresponding alloy grade, and standard compliance assessment
IV. Key Considerations
Sample representativeness: For castings, avoid shrinkage cavities and segregation zones; for profiles, sample the cross-section
Elements tested: Standard mandatory tests cover major alloying elements such as Si, Fe, Cu, Mn, Mg, Zn, and Ti
RoHS requirements: If intended for electronics/appliances, separate RoHS testing (for the 6 restricted substances including Pb and Cd) is required
Report validity: Composition analysis reports are generally valid indefinitely, though clients or platforms often require reports issued within the last year
V. Application Examples
6061 vs. 6063: Misclassification often arises from variations in the Mg/Si ratio; precise testing is required.
Recycled aluminum: Higher impurity levels (Fe, Cu) can affect alloy grade classification.
Import customs clearance: Customs authorities may request a composition report to verify the HS code.
Please feel free to ask for further information regarding testing parameters, price quotes, or recommended testing agencies for specific alloy grades (such as 6061 or 7075).
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