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, 2022 M08 21 - 17 pages
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.
Add the provisions analysis of iron austenite chemical analysis chemical composition classification and designation content GB/T continuously hot rolled Designation and chemical designation representation method determine the technical Dual phase steel elongation after fracture force plastic elongation High hole expansion high strength steel hot rolled high hot rolled pickled Hot Rolled Steel Hot rolled surface induced plasticity steel Infrared absorption method Inspection items longitudinally-cut steel strips Low-Alloy Steel mark and certification maximum force plastic mechanical properties method after combustion Methods for chemical Negotiated Negotiated Negotiated order content package provisions of GB/T requirements for continuously rolled high strength rolled pickled surface sheet and strip similar designations Spectrophotometric Method GB/T steel and alloy Steel and iron steel sheets cross-cut strain hardening exponent strength steel sheet strip for automobile strips shall comply supplier Surface quality level technical requirements tensile strain hardening tensile strength Tensile test test methods Transformation induced plasticity yield strength steel