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Core content: MTC (Material Test Certificate) is the quality assurance document issued by the steel mill, and it is crucial for customs clearance and quality inspection for importers. A complete MTC should include: steel mill name, product standard (e.g., GB/T 3274-2017), grade and specifications, heat number, chemical composition, mechanical property test results, and factory seal. As a service provider, we remind our clients: when inquiring about prices and placing orders, clearly request an MTC that conforms to the standards of your destination country; for critical projects, you can designate an international third-party organization (such as SGS) to conduct pre-shipment inspection (PSI) based on the MTC data. This is an effective way to protect your rights.