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Black metal, also known as steel materials, includes industrial pure iron with over 90% iron content, cast iron with 2% to 4% carbon content, carbon steel with less than 2% carbon content, as well as structural steel, stainless steel, heat-resistant steel, high-temperature alloys, precision alloys, etc. for various purposes. Broadly speaking, black metals also include chromium, manganese, and their alloys. Cast iron and steel are both alloys of iron and carbon, with differences in carbon content and internal microstructure. Cast iron is an iron carbon alloy with a carbon content greater than 2%, while steel is an iron carbon alloy with a carbon content less than 2%. They are the most widely used metal materials in industry and occupy an extremely important position in the national economy Function of testing report:1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report 2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problems100% inspection and testing process:1. Telephone communication and confirmation of requirements 2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:1. The testing industry is fully covered, meeting different testing needs 2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate 4. Free initial testing, with no testing fees charged 5. Self service order delivery for free on-site sampling 6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China
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