Metal Material Composition Analysis and Testing Report Process
Date：2025-11-06 10:06:08 Classification
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Compositional analysis is a technique that analyzes the composition of a product or sample using microscopic spectra and femtosecond laser detection of molecular structure, performing qualitative and quantitative analysis of each component. Metal material compositional analysis test reports are crucial for product quality control and compliance; this is a standardized and rigorous process.
I. Standard Process for Metal Material Compositional Analysis Test Reports
1. Preliminary Preparation Stage
- Define Testing Needs
Determine the testing standards (e.g., Chinese national standard GB, international standard ASTM, EU standard EN, etc.) and testing items (qualitative/quantitative elemental analysis, grade identification, etc.) based on the product's intended use (e.g., export, quality control, R&D, etc.).
- Select a Testing Institution
Prioritize third-party laboratories with CMA/CNAS accreditation (e.g., Dezeway Testing CNAS registration number: L8083), confirming that their testing scope covers the target metal types (e.g., stainless steel, aluminum alloys, copper alloys, etc.).
2. Sample Submission Stage
- Sample Collection and Preparation
- Samples must be representative, avoiding surface contamination or oxide layers that could affect results;
- Solid samples must be cut into small pieces (usually 5-10g), powder or liquid samples must be sealed and stored;
- Special samples (such as coatings, welds) must have the testing area marked.
- Submission of Documents
Complete the testing application form, indicating the sample name, material type, testing standard, whether expedited processing is required, etc., and send it along with the sample.
3. Laboratory Testing Stage
- Sample Pretreatment
The laboratory will clean, grind, and dissolve (e.g., acid dissolution, melting) the samples to ensure homogeneity and detectability.
- Detection Method Selection
Select the appropriate technology based on the metal type and elemental characteristics:
| Method | Applicable Scenarios | Advantages
| Spark Electron Spectrometry (OES) | Rapid analysis of common metals such as steel and aluminum alloys | High efficiency (5-10 minutes/sample)
| X-ray Fluorescence Spectrometry (XRF) | Coating thickness, non-destructive screening of multiple elements | Non-destructive, suitable for valuable samples
| Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES) | Precise quantification of trace elements (ppm level) | Low detection limit, suitable for complex alloys
| Chemical Titration | Classical analysis of macroelements (such as carbon and sulfur) | Low cost, stable data
4. Report Generation and Review Stage
- Data Processing and Report Compilation
The laboratory generates a report based on the test data, including:
- Sample information (name, batch number, submitting unit);
- Detection method and standard basis;
- Element type and content (e.g., Fe: 98.5%, Cr: 1.2%);
- Conclusion (whether it meets the customer's specified standards).
- Review and Issuance
The report must be reviewed by the technical manager to ensure data accuracy and compliance. It becomes officially effective after being stamped with the CMA/CNAS seal (DEZEW Testing CNAS Registration No.: L8083).
5. Report Delivery and Application
- Delivery Method
Electronic (PDF) and paper versions of the report are usually provided, with a turnaround time of 5-7 working days (expedited processing can be shortened to 1-3 days).
- Application Scenarios
- Product quality verification (e.g., incoming raw material inspection);
- Export compliance (e.g., EU RoHS, US ASTM standards);
- R&D improvement (e.g., adjusting alloy formulation to optimize performance).
II. Precautions
1. Sample Representativeness: Avoid taking samples from edges, oxide layers, or welded areas. It is recommended to provide at least 3 parallel samples to reduce errors.
2. Standard Selection: Export products must clearly define the target market standards (e.g., EU must comply with EN 10276, US must comply with ASTM E1019). 3. Report validity period: Usually 1-2 years, but if the raw material batch or production process changes, retesting is required.
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