When reviewing the material list, you need to verify the basic information: the grade and specifications. This is the most basic step. The grade on the material list must match the grade you need.
Confirm the batch correspondence: the heat number and batch number on the material list. Upon receiving the goods, it is essential to verify that the inkjet printing/labels on the actual items match the material list. This is crucial for tracing the origin of steel and ensuring that the "goods and documents match".
Check the official seal and signature: The material certificate must have the manufacturer's quality inspection seal and the signature or seal of the quality inspector. If it is a photocopy, it must be stamped with the supplier's official seal and marked "Consistent with the original".
Check for alterations: Any signs of alteration to critical information (such as performance data, specifications, batch numbers) should be considered invalid proof.

Verify performance data: Chemical composition: Pay close attention to whether the content of elements such as carbon (C), silicon (Si), manganese (Mn), phosphorus (P), and sulfur (S) is within the range specified in the standard. In particular, if the sulfur (S) content is abnormally low but there is a lack of corresponding technological support, we should be wary of data falsification.

Mechanical properties: Check whether the measured data such as yield strength, tensile strength, elongation, and impact energy meet the standard requirements. It should be noted that different testing methods may lead to different results.

Special performance requirements: If the contract has special requirements (such as Z-axis performance, low-temperature impact toughness), the material list must have corresponding measured data, and cannot rely on vague markings.

Verify authenticity and compliance: Use official channels for traceability: Many large steel mills (such as Baosteel, Shougang, and Taiyuan Iron & Steel) provide online quality assurance certificate query systems or anti-counterfeiting QR codes. These official channels should be used first for verification.

Beware of "perfect" data: When a supplier's quote is 8%-10% lower than the daily average price of similar products published by CSMC, and the material list data is unusually "perfect" (all indicators are at the standard upper limit with no dispersion), this is often a precursor to fraud.
Normal test data will have reasonable dispersion. If all the data is "perfect" and without any fluctuations, it may actually be a sign of artificial manipulation.

On-site sampling and re-inspection: For imported steel, mixed batches of steel, or when there is doubt about the quality, an independent re-inspection should be conducted by a qualified third-party laboratory.

Time：03/07/2026 17:03:23

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