In the daily monitoring of third-party testing, there are many relevant standards and parameters for the characteristic testing of stainless steel to help the testing enterprise determine whether the product is qualified. Of course, to understand these issues, we must understand what stainless steel is and how we should test its performance
Detection scope: Antibacterial stainless steel, precipitation hardening stainless steel, classified by composition - Cr series (400 series), Cr Ni series (300 series), Cr Mn Ni (200 series), heat-resistant chromium alloy steel (500 series) and precipitation cherry blossom series (600 series), stainless steel mesh, stainless steel mesh belt, etc Testing items for stainless steel: 1. Physical properties: magnetic properties, electrical properties, thermal properties, oxidation resistance, wear resistance, salt spray, corrosion, density, thermal expansion coefficient, elastic modulus, hardness, etc; 2. Chemical properties: atmospheric corrosion, intergranular corrosion, stress corrosion, pitting corrosion, corrosion fatigue, artificial atmosphere corrosion, etc; 3. Mechanical properties: tensile, bending, yield, fatigue, torsion, stress, stress relaxation, impact, wear, hardness, hydraulic resistance, tensile creep, expansion, flattening, compression, shear strength, etc; 4. Process performance: fine wire stretching, fracture inspection, repeated bending, bidirectional torsion, hydraulic test, expanding, bending, curling, flattening, ring expansion, ring stretching, microstructure, metallographic analysis, etc; 5. Non destructive testing: X-ray non-destructive testing, electromagnetic ultrasonic testing, ultrasonic testing, eddy current testing, magnetic flux leakage testing, penetration testing, magnetic particle testing, etc; 6. Failure analysis: fracture analysis, corrosion analysis, etc; 7. Metallographic examination: macroscopic metallography and microscopic metallography are equal; 8. Brand identification: 304, 304L, 316 and other stainless steels; Element content detection: nickel Ni, chromium Cr, molybdenum Mo, iron Fe, etc Testing standard: GB/T13305-2008 Stainless steel α－ Metallographic determination of phase area content GB/T13671-1992 Electrochemical test method for crevice corrosion of stainless steel GB/T15975-2012 Seamless stainless steel pipes for structural use GB/T15976-2012 Seamless stainless steel pipes for fluid transportation GB/T17899-1999 Measurement method for pitting corrosion potential of stainless steel GB/T18615-2002 Non alloy steel and stainless steel joints for corrugated metal hoses GB/T18704-2008 Stainless steel composite pipes for structural use GB/T1954-2008 Chromium nickel austenite Measurement Method for Ferrite Content in Austenitic Stainless Steel Welds GB/T2015-2005 Metal and Other Inorganic Coatings - Electropolishing Method for Flattening and Passivation of Stainless Steel Parts GB/T20878-2007 Stainless Steel and Heat-resistant Steel Grades and Chemical Composition GB/T21533-2008 Sensitivity Testing of Intergranular Corrosion in Stainless Steel Pressure Vessels GB/T21832-2008 Austenitic Ferritic Duplex Stainless Steel Welded Steel Pipe GB/T21833-2008 Austenitic Ferritic Duplex Stainless Steel Seamless steel pipe
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 problemsBaijian 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