GB/T 20564.4-2022 Translated English of Chinese Standard (GB/T20564.4-2022, GBT20564.4-2022): Continuously cold rolled high strength steel sheet and strip for automobile¡ªPart 4£ºHigh strength low alloy steelThis document specifies the classification and designation expression method, order contents, dimensions, shapes, weights, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of continuously cold rolled high strength low alloy steel sheet and strip for automobile. This document is applicable to continuously cold rolled high strength low alloy steel sheet and strip (with a thickness not greater than 3.0 mm) mainly used to fabricate structural parts and reinforcements of automobile. |
Contents
Scope | 9 |
This document serves as a replacement of GBT 20564 42010 Continuously Cold Rolled High | 10 |
Dual Phase Steel with High Formability The purpose is to determine | 12 |
Dimensions Shapes and Weights 7 Technical Requirements 8 Test Methods 9 Inspection Rules 10 Packaging Marking and Quality Certificate 11 Com... | 15 |
Common terms and phrases
4.2.2 In accordance Advanced Surface Advanced allowed to decrease break is allowed Bright Surface Code carbon steel chemical composition melting Classification 4.2.1 Classification by Surface Code Surface Structure completion of manufacture composition melting analysis date of completion demand-side requires Designation Expression Method Designations and Recommended dimensions and unevenness electroplating elongation at break English Cold Rolled English Low Alloy grain refinement greater than 0.50 Inspection Items Level Relatively Advanced Low Alloy Steel maximum force-plastic elongation micro-alloy elements minimum yield strength negotiated during ordering niobium Pitted Surface Bright Relatively Advanced Surface sheet and strip sheet or strip shown in Table specified minimum yield steel sheet stipulations of GB/T stipulations of Table Strain Hardening Exponent strip is shown strip shall comply Structure Pitted Surface supply-side shall guarantee Surface Bright Surface Surface Code Surface surface quality level Surface Structure Pitted Surface Super Advanced Tensile Strain Hardening Tensile Strength Test Methods unevenness accuracy vanadium yield strength value