A certificate of conformity is a document issued by the steel plate manufacturer or a third-party testing agency, proving that the steel plate has undergone relevant testing and inspection, meets relevant standards and specifications, and is ready for sale.
A material certificate is a document issued by the supplier, proving the quality and composition of the materials used in the steel plate. Through the material certificate, customers can check the specific grade, steel number, chemical composition, mechanical properties, and other information of the steel plate, thereby confirming whether the steel plate's quality meets requirements.
Material certificates are also typically used for steel plate traceability, facilitating the identification and resolution of quality issues. Although material certificates and certificates of conformity have different meanings and functions, they are both related to the quality of the steel plate and play an equally important role. Therefore, steel plate manufacturers usually provide both material certificates and certificates of conformity simultaneously to ensure the quality, performance, and compliance of the steel plates. 

Time：14/07/2026 16:17:33

When purchasing steel, a material certificate and a certificate of conformity are two different documents, but usually both are required as they are crucial documents for ensuring steel quality.
The certificate of conformity is relatively simple, mainly containing basic information such as product name, model, specifications, batch number, quantity, and a "qualified" mark. Steel certificates of conformity are sometimes colloquially referred to as quality certificates.
In addition to basic information, the material certificate details key data such as the steel's chemical composition and mechanical properties (e.g., yield strength, tensile strength). It is an important basis for understanding the steel's performance.
The material certificate provides detailed performance data for the steel, forming the foundation for quality traceability and technical verification. For export trade, a material certificate conforming to international standards (such as EN 10204) is a core document.

Time：10/07/2026 16:45:10

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