GB/T 20564.12-2019 Translated English of Chinese Standard. (GBT 20564.12-2019, GB/T20564.12-2019, GBT20564.12-2019): Continuously cold rolled high strength steel sheet and strip for automobile - Part 12: Dual phase steel with high formability
https://www.chinesestandard.net, Oct 12, 2019 - Technology & Engineering - 14 pages
This Part of GB/T 20564 specifies the terms and definitions, classification and designation representation method, ordering contents, dimensions, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of continuously cold rolled high strength steel sheet and strip for automobile. This Part applies to steel sheets and strips with a thickness of 0.50 mm ~ 3.00 mm, used for the manufacture of complex-forming automotive structural parts and reinforcements.
Packaging marking and quality certificate
Annex A informative Chemical composition of steel
Annex B informative Approximation comparison of domestic and foreign designations
accepted according to surface analysis of iron Annex applies batch blue spectrophotometric method calculated carbon carried chemical analysis chemical composition Classification Code coil cold rolled high content GB/T Continuously cold rolled defective demand party designation designation representation method Determination dimensions Dual phase steel edge flatness precision hardening index high formability high strength steel induction furnace marking and quality Measuring mechanical properties method after combustion Methods for chemical negotiated ordering packaging photometric method Pitted surface provisions of GB/T quality certificate reference requirements of Table rolled high strength roughness rounding rules sampling quantity shape sheets and strips shown in Table special requirements specified minimum specimen spectrophotometric method GB/T Standard steel and alloy Steel and iron Steel strips steel with high storage strain hardening strip for automobile strips shall comply sulfur content supply party surface quality grade surface structure Technical Tensile test test methods titration uniform elongation weight