Foreword
This document is developed in accordance with the rules given in GB/ T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.
This document is Part 13 of GB/T 20564 Basic information description of agricultural products for purchase and sale. The following parts of GB/T 20564 have been issued:
——Part 1: Bake hardening steel;
——Part 2: Dual phase steel;
——Part 3: High strength interstitial free steel;
——Part 4: High strength low alloy steel;
——Part 5: Isotropic steel;
——Part 6: Transformation induced plasticity steel;
——Part 7: Martensitic steels;
——Part 8: Complex phase steel;
——Part 9: Quenching and partitioning steel;
——Part 10: Twinning induced plasticity steel;
——Part 11: Carbon manganese steel;
——Part 12: Dual phase steel with high formability
——Part 13: Medium manganese steel
——Part 14: Low density steel.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.
This document was proposed by China Iron and Steel Association.
This document was prepared by Technical Committee 183 on Steel of Standardization Administration of China (SAC/ TC183).
Introduction
GB/T 20564 aims to standardize the designations and classification, ordering content, size, 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.
GB/T 20564 comprises of four parts:
——Part 1: Bake hardening steel. The purpose is to determine the technical requirements of continuously cold rolled bake hardening high strength steel sheet and strip for automobile with thickness of 0.50 mm to 3.00 mm, which are mainly used for manufacturing outer plates, inner plates and some structural parts of automobiles.
——Part 2: Dual phase steel. The purpose is to determine the technical requirements of continuously cold rolled dual phase high strength steel sheet and strip with thickness of 0.50 mm to 3.00 mm, which are mainly used for manufacturing automobile outer plates, inner plates and some structural parts of automobiles.
——Part 3: High strength interstitial free steel. The purpose is to determine the technical requirements of continuously cold rolled high strength interstitial free steel sheet and strip with thickness of 0.50 mm to 3.00 mm, which are mainly used for manufacturing outer plates, inner plates and some structural parts of automobiles.
——Part 4: High strength low alloy steel.
The purpose is to determine the technical requirements of continuously cold rolled high strength low alloy steel sheet and strip with thickness of no less than 3.00 mm, which are mainly used for manufacturing structural parts and reinforcements of automobiles.
——Part 5: Isotropic steel. The purpose is to determine the technical requirements of continuously cold rolled high strength isotropic steel sheet and strip with thickness not more than 2.5 mm, which are mainly used to make outer coverings of automobiles.
——Part 6: Transformation induced plasticity steel. The purpose is to determine the technical requirements of continuously cold rolled high strength transformation induced plasticity steel sheet and strip with thickness of 0.50 mm to 2.5 mm, which are mainly used to make structural parts and reinforcements of automobiles.
——Part 7: Martensitic steels. The purpose is to determine the technical requirements of continuously cold rolled high strength martensitic steel sheet and strip with thickness of 0.50 mm to 2.1 mm, which are mainly used for manufacturing structural parts, reinforcements and anti-collision parts of automobiles
——Part 8: Complex phase steel. The purpose is to determine the technical requirements of continuously cold rolled high strength complex phase steel plates and strips with thickness of 0.60 mm to 2.50 mm, which are mainly used for manufacturing structural parts, reinforcements and some inner and outer plates of automobiles.
——Part 9: Quenching and partitioning steel. The purpose is to determine the technical requirements of continuously cold rolled high strength quenching and partitioning steel plates and strips with thickness of 0.8 mm to 2.5 mm, which are mainly used for manufacturing structural parts and reinforcements of automobiles.
——Part 10: Twinning induced plasticity steel. The purpose is to determine the technical requirements of continuously cold rolled high strength twinning induced plasticity steel plates and strips with thickness of 0.50 mm to 3.00 mm, which are mainly used for manufacturing complexly shaped structural parts and reinforcements of automobiles.
——Part 11: Carbon manganese steel. The purpose is to determine the technical requirements of continuously cold rolled high strength carbon manganese steel plates and strips with thickness of 0.50 mm to 3.00 mm, which are mainly used for manufacturing structural parts of automobiles.
——Part 12: Dual phase steel with high formability The purpose is to determine the technical requirements of continuously cold rolled high strength dual phase high formability steel with plates and strips with thickness of 0.50 mm to 3.00 mm, which are mainly used for manufacturing complexly shaped structural parts and reinforcements of automobiles.
——Part 13: Medium manganese steel The purpose is to determine the technical requirements of continuously cold rolled high strength medium manganese steel plates and strips with thickness of 1.0 mm to 2.5 mm, which are mainly used for manufacturing structural parts and reinforcements of automobiles.
——Part 14: Low density steel. The purpose is to determine the technical requirements of continuously cold rolled high strength low density steel plates and strips with thickness of 0.6 mm to 3.0 mm, which are mainly used for manufacturing structural parts and reinforcements of automobiles.
Continuously cold rolled high strength steel sheet and strip for automobile -
Part 13:
Medium manganese steel
1 Scope
This document specifies the designation, classification, ordering contents, size, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of continuously cold rolled high strength medium manganese steel plates and strips for automobiles.
This document is applicable to continuously cold rolled high strength medium manganese steel plates and strips with thickness of 0.50 mm to 2.5 mm, which are mainly used for manufacturing structural parts and reinforcements of automobiles (hereinafter referred to as "steel plates and strips").
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 223.4 Alloyed steel - Determination of manganese content - Potentiometric or visual titration method
GB/T 223.5 Steel and iron - Determination of acid-soluble silicon and total silicon content - Reduced molybdosilicate spectrophotometric method
GB/T 223.9 Iron steel and alloy - Determination of aluminium content - Chrom azurol S photometric method
GB/T 223.40 Iron steel and alloy - Determination of niobium content by the sulphochlorophenol S spectrophotometric method
GB/T 223.59 Iron steel and alloy - Determination of phosphorus content - Bismuth phosphomolybdate blue spectrophotometric method and antimony phosphomolybdate blue spectrophotometric method
GB/T 223.76 Methods for chemical analysis of iron, steel and alloy - The flame atomic absorption spectrometric method for the determination of vanadium content
GB/T 223.84 Steel and iron - Determination of titanium content - Diantipyrylmethane spectrophotometric method
GB/T 223.85 Steel and iron - Determination of sulfur content - Infrared absorption method after combustion in an induction furnace
GB/T 223.86 Steel and iron - Determination of total carbon content - Infrared absorption method after combustion in an induction furnace
GB/T 228.1-2021 Metallic materials - Tensile testing - Part 1: Method of test at room temperature
GB/T 247 General rule of package mark and certification for steel plates (sheets) and strips
GB/T 708 Dimension, shape, weight and tolerance for cold-rolled steel strip and sheet
GB/T 2523 Measuring method of surface roughness, peak count and waviness for cold-rolled metal sheet and strip
GB/T 2975 Steel and steel products - Location and preparation of samples and test pieces for mechanical testing
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values
GB/T 17505 Steel and steel products - General technical delivery requirements
GB/T 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
medium manganese steel
steel with manganese content of 3% to 10%,formed into multiphase structure containing metastable austenite via reverse transformation of austenite, and with its strength and plasticity improved by transformation induced plasticity or twinning induced plasticity, and with its strength-plastic product generally not less than 30GPa%
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Designations and classification
5 Ordering contents
6 Size, shape and weight
7 Technical requirements
8 Test methods
9 Inspection rules
10 Packaging, marking and quality certificate
Annex A (Informative) Reference values for chemical composition (melting analysis) of steels
Bibliography
Foreword
This document is developed in accordance with the rules given in GB/ T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.
This document is Part 13 of GB/T 20564 Basic information description of agricultural products for purchase and sale. The following parts of GB/T 20564 have been issued:
——Part 1: Bake hardening steel;
——Part 2: Dual phase steel;
——Part 3: High strength interstitial free steel;
——Part 4: High strength low alloy steel;
——Part 5: Isotropic steel;
——Part 6: Transformation induced plasticity steel;
——Part 7: Martensitic steels;
——Part 8: Complex phase steel;
——Part 9: Quenching and partitioning steel;
——Part 10: Twinning induced plasticity steel;
——Part 11: Carbon manganese steel;
——Part 12: Dual phase steel with high formability
——Part 13: Medium manganese steel
——Part 14: Low density steel.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.
This document was proposed by China Iron and Steel Association.
This document was prepared by Technical Committee 183 on Steel of Standardization Administration of China (SAC/ TC183).
Introduction
GB/T 20564 aims to standardize the designations and classification, ordering content, size, 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.
GB/T 20564 comprises of four parts:
——Part 1: Bake hardening steel. The purpose is to determine the technical requirements of continuously cold rolled bake hardening high strength steel sheet and strip for automobile with thickness of 0.50 mm to 3.00 mm, which are mainly used for manufacturing outer plates, inner plates and some structural parts of automobiles.
——Part 2: Dual phase steel. The purpose is to determine the technical requirements of continuously cold rolled dual phase high strength steel sheet and strip with thickness of 0.50 mm to 3.00 mm, which are mainly used for manufacturing automobile outer plates, inner plates and some structural parts of automobiles.
——Part 3: High strength interstitial free steel. The purpose is to determine the technical requirements of continuously cold rolled high strength interstitial free steel sheet and strip with thickness of 0.50 mm to 3.00 mm, which are mainly used for manufacturing outer plates, inner plates and some structural parts of automobiles.
——Part 4: High strength low alloy steel.
The purpose is to determine the technical requirements of continuously cold rolled high strength low alloy steel sheet and strip with thickness of no less than 3.00 mm, which are mainly used for manufacturing structural parts and reinforcements of automobiles.
——Part 5: Isotropic steel. The purpose is to determine the technical requirements of continuously cold rolled high strength isotropic steel sheet and strip with thickness not more than 2.5 mm, which are mainly used to make outer coverings of automobiles.
——Part 6: Transformation induced plasticity steel. The purpose is to determine the technical requirements of continuously cold rolled high strength transformation induced plasticity steel sheet and strip with thickness of 0.50 mm to 2.5 mm, which are mainly used to make structural parts and reinforcements of automobiles.
——Part 7: Martensitic steels. The purpose is to determine the technical requirements of continuously cold rolled high strength martensitic steel sheet and strip with thickness of 0.50 mm to 2.1 mm, which are mainly used for manufacturing structural parts, reinforcements and anti-collision parts of automobiles
——Part 8: Complex phase steel. The purpose is to determine the technical requirements of continuously cold rolled high strength complex phase steel plates and strips with thickness of 0.60 mm to 2.50 mm, which are mainly used for manufacturing structural parts, reinforcements and some inner and outer plates of automobiles.
——Part 9: Quenching and partitioning steel. The purpose is to determine the technical requirements of continuously cold rolled high strength quenching and partitioning steel plates and strips with thickness of 0.8 mm to 2.5 mm, which are mainly used for manufacturing structural parts and reinforcements of automobiles.
——Part 10: Twinning induced plasticity steel. The purpose is to determine the technical requirements of continuously cold rolled high strength twinning induced plasticity steel plates and strips with thickness of 0.50 mm to 3.00 mm, which are mainly used for manufacturing complexly shaped structural parts and reinforcements of automobiles.
——Part 11: Carbon manganese steel. The purpose is to determine the technical requirements of continuously cold rolled high strength carbon manganese steel plates and strips with thickness of 0.50 mm to 3.00 mm, which are mainly used for manufacturing structural parts of automobiles.
——Part 12: Dual phase steel with high formability The purpose is to determine the technical requirements of continuously cold rolled high strength dual phase high formability steel with plates and strips with thickness of 0.50 mm to 3.00 mm, which are mainly used for manufacturing complexly shaped structural parts and reinforcements of automobiles.
——Part 13: Medium manganese steel The purpose is to determine the technical requirements of continuously cold rolled high strength medium manganese steel plates and strips with thickness of 1.0 mm to 2.5 mm, which are mainly used for manufacturing structural parts and reinforcements of automobiles.
——Part 14: Low density steel. The purpose is to determine the technical requirements of continuously cold rolled high strength low density steel plates and strips with thickness of 0.6 mm to 3.0 mm, which are mainly used for manufacturing structural parts and reinforcements of automobiles.
Continuously cold rolled high strength steel sheet and strip for automobile -
Part 13:
Medium manganese steel
1 Scope
This document specifies the designation, classification, ordering contents, size, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of continuously cold rolled high strength medium manganese steel plates and strips for automobiles.
This document is applicable to continuously cold rolled high strength medium manganese steel plates and strips with thickness of 0.50 mm to 2.5 mm, which are mainly used for manufacturing structural parts and reinforcements of automobiles (hereinafter referred to as "steel plates and strips").
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 223.4 Alloyed steel - Determination of manganese content - Potentiometric or visual titration method
GB/T 223.5 Steel and iron - Determination of acid-soluble silicon and total silicon content - Reduced molybdosilicate spectrophotometric method
GB/T 223.9 Iron steel and alloy - Determination of aluminium content - Chrom azurol S photometric method
GB/T 223.40 Iron steel and alloy - Determination of niobium content by the sulphochlorophenol S spectrophotometric method
GB/T 223.59 Iron steel and alloy - Determination of phosphorus content - Bismuth phosphomolybdate blue spectrophotometric method and antimony phosphomolybdate blue spectrophotometric method
GB/T 223.76 Methods for chemical analysis of iron, steel and alloy - The flame atomic absorption spectrometric method for the determination of vanadium content
GB/T 223.84 Steel and iron - Determination of titanium content - Diantipyrylmethane spectrophotometric method
GB/T 223.85 Steel and iron - Determination of sulfur content - Infrared absorption method after combustion in an induction furnace
GB/T 223.86 Steel and iron - Determination of total carbon content - Infrared absorption method after combustion in an induction furnace
GB/T 228.1-2021 Metallic materials - Tensile testing - Part 1: Method of test at room temperature
GB/T 247 General rule of package mark and certification for steel plates (sheets) and strips
GB/T 708 Dimension, shape, weight and tolerance for cold-rolled steel strip and sheet
GB/T 2523 Measuring method of surface roughness, peak count and waviness for cold-rolled metal sheet and strip
GB/T 2975 Steel and steel products - Location and preparation of samples and test pieces for mechanical testing
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values
GB/T 17505 Steel and steel products - General technical delivery requirements
GB/T 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
medium manganese steel
steel with manganese content of 3% to 10%,formed into multiphase structure containing metastable austenite via reverse transformation of austenite, and with its strength and plasticity improved by transformation induced plasticity or twinning induced plasticity, and with its strength-plastic product generally not less than 30GPa%
Contents of GB/T 20564.13-2023
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Designations and classification
5 Ordering contents
6 Size, shape and weight
7 Technical requirements
8 Test methods
9 Inspection rules
10 Packaging, marking and quality certificate
Annex A (Informative) Reference values for chemical composition (melting analysis) of steels
Bibliography
