Steps for handling the composition analysis report of metallic materials
Date：2026-03-02 09:26:10 Classification
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Processing a metal material composition analysis report is usually to confirm the material grade, verify material quality, conduct failure analysis, or meet import and export compliance requirements.
The following are the detailed steps for processing a metal material composition analysis report:
Step 1: Clarify the testing requirements
Before looking for a testing agency, you need to clarify the following points so that the agency can accurately quote and arrange testing:
1. Testing object: What metal is it? (such as stainless steel, aluminum alloy, copper alloy, titanium alloy, unknown metals, etc.).
2. Purpose of testing:
Full analysis: Analyze the content of all elements in the material (usually used for determining unknown materials).
Verification analysis: Check whether specific elements meet a certain standard (such as confirming whether they are 304 stainless steel).
Grade determination: Determine which grade the material belongs to through component analysis (e.g. national standard Q235, American standard 6061).
3. Execution standards: Are there specified testing standards? (such as GB/T, ASTM, ISO, JIS, etc.). If not, the laboratory will recommend standards based on experience.
Step 2: Choose a testing institution
Choosing a qualified third-party testing agency is crucial.
1. Qualification verification: Confirm whether the institution has CMA (China Metrology Accreditation) and CNAS (China National Accreditation Service for Conformity Assessment) qualifications (Dezewei Testing CNAS registration number: L8083). This ensures that the report has legal validity and international recognition.
2. Scope of competence: Confirm that the laboratory's accreditation scope includes the metal materials and standards you need to test.
Step 3: Fill out the application form and provide a quotation
1. Fill out the commission form: Request a testing application form from the institution, fill in company information, sample information, testing items, and standards.
2. Confirm quotation: The institution will issue a quotation based on your needs. The cost usually depends on the testing method (such as spectroscopic methods being cheaper, chemical methods being more expensive), the number of testing elements, and the quantity of samples.
3. Signing Agreement: After confirming the quotation, both parties sign a testing service contract.
Step 4: Sample Preparation and Shipping
This is an easily overlooked step, as sample quality directly affects the results.
1. Sample size:
Direct reading spectroscopy: It is usually required that the sample be in the form of a block and have a flat plane (preferably with a diameter or side length greater than 10mm) for excitation.
Chemical wet process/ICP: No special requirements for shape, but requires a certain weight (usually a few grams) that can be cut and dissolved.
2. Sample processing: The surface of the sample should be clean, free of oil stains, rust, and coatings. If there is a coating or oxide scale on the surface, it needs to be polished and removed before shipping.
3. Sending samples: Send the samples by mail or to the laboratory.
Step 5: Laboratory testing
After receiving the samples, the laboratory will perform the following operations:
1. Sample registration: Verify the status of the sample and enter it into the system.
2. Pre processing: cutting, grinding, polishing (for spectral analysis) or sample, acid digestion (for chemical analysis).
3. Machine testing:
Direct Reading Spectrometer (OES): The most commonly used method, fast, accurate, suitable for substrates such as Fe, Al, Cu, etc.
X-ray fluorescence spectroscopy (XRF): Non destructive testing, suitable for screening, but has weak detection ability for light elements such as C, S, and Li.
ICP-OES/ICP-MS: With extremely high accuracy, it is suitable for trace element analysis and high-purity metal analysis.
Carbon and sulfur analyzer: specifically designed to measure the content of carbon and sulfur.
4. Data verification: The testing personnel analyze the data and have it reviewed by an authorized signatory.
Step 6: Issue a report
1. Draft report: Some institutions will first send a draft to the client to confirm the accuracy of the information.
2. Formal report: Print a paper report and stamp it with CMA/CNAS seal and testing special seal.
3. Sending the report: Send the paper report by express delivery or send the electronic PDF version.
Step 7: Follow up Services
If there are any objections to the reported data, the institution can be requested to conduct retesting or interpretation.
If used for import and export, institutions may also need to provide an English version of the report.
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