GB/T 20887.4-2022 Translated English of Chinese Standard (GB/T20887.4-2022, GBT 20887.4-2022): Continuously hot rolled high strength steel sheet and strip for automobile -- Part 4: Transformation induced plasticity steel
https://www.chinesestandard.net, 21.08.2022 - 17 Seiten
This document specifies the terms and definitions, classification and designation representation method, order content, dimension, shape, weight, technical requirements, test methods, inspection rules, package, mark and certification of continuously hot rolled high strength transformation induced plasticity steel sheet and strip for automobile. This document applies to continuously hot rolled transformation induced plasticity steel strips with a thickness of not more than 6.0 mm, steel sheets cross-cut from them, and longitudinally-cut steel strips.
according Add the provisions analysis of iron applies carbon Change chemical analysis chemical composition China coil cold forming content GB/T continuously hot rolled contract defective designation representation method determine the technical dimension edition English force plastic elongation Grain high strength steel hot rolled high hot rolled pickled indicated induced plasticity steel inspection document Inspection items less longitudinally-cut steel strips manufacture mark and certification maximum force plastic mechanical properties Metallic Methods for chemical microstructure oiled package provisions of GB/T purchaser requirements for continuously rolled high strength rolled pickled surface rounding rules sampling shape sheet and strip similar designations slight Smelting specified minimum Spectrophotometric Method GB/T standards steel and alloy Steel and iron Steel Products steel sheets cross-cut strength steel sheet strip for automobile strips shall comply structures supplier Surface quality level Table technical requirements tensile strain hardening test methods thickness Transformation induced plasticity weight yield strength steel