GB/T 20564.10-2017Continuously cold-rolled high strength steel sheet and strip for automobiles - Part 10: Twinning induced plasticity steel (English PDF)

Foreword

GB/T 20564 Continuously Cold Rolled High Strength Steel Sheet and Strip for Automobile can be divided into the following 11 parts.

--- 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 Steel;

--- Part 8. Complex Phase Steel;

--- Part 9. Quenching and Partitioning Steel;

--- Part 10. Twinning Induced Plasticity Steel;

--- Part 11. Carbon Manganese Steel.

This Part belongs to Part 10 of GB/T 20564.

This Part was drafted as per the rules specified in GB/T 1.1-200.

1 Scope

This Part of GB/T 20564 specifies the terms and definitions, classification and grade expression method, ordering content, dimension, shape, weight, technical requirements, test methods, inspection rules, package, mark and quality certificate of continuously cold rolled twinning induced plasticity high strength steel sheet and strip.

This Part is applicable to steel sheet and strip (hereinafter referred to as "steel sheet and strip") manufactured automotive complex structural parts, reinforcements, etc., with the thickness of 0.50mm~3.00mm.

2 Normative References

The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this document.

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 Aluminum Content - Chrom Azurol S Photometric 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 223.60 Methods for Chemical Analysis of Iron, Steel and Alloy - The Perchloric Acid Dehydration Gravimetric Method for the Determination of Silicon Content

GB/T 223.68 Methods for Chemical Analysis of Iron, Steel and Alloy - The Potassium Iodate Titration Method after Combustion in the Pipe Furnace for the Determination of Sulfur Content

GB/T 223.71 Methods for Chemical Analysis of Iron, Steel and Alloy the Gravimetric Method after Combustion in the Pipe Furnace for the Determination of Carbon Content

GB/T 223.79 Iron and Steel - Determination of Multi-Element Contents - X-Ray Fluorescence Spectrometry

GB/T 228.1-2010 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 Plate and Strip

GB/T 2523 Measuring Method of Surface Roughness and Peak Count for Cold- Rolled Metal Sheet (Strip)

GB/T 2975 Steel and Steel Products - Location and Preparation of Test Pieces for Mechanical Testing

GB/T 4336 Carbon and Low-Alloy Steel - Determination of Multi-Element Contents -Spark Discharge Atomic Emission Spectrometric Method (Routine Method)

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

GB/T 20123 Steel and Iron - Determination of Total Carbon and Sulfur Content Infrared Absorption Method after Combustion in an Induction Furnace (Routine Method)

GB/T 20125 Low-Alloy Steel - Determination of Multi-Element Contents - Inductively Coupled Plasma Atomic Emission Spectrometric Method

GB/T 20126 Unalloyed Steel - Determination of Low Carbon Content - Part 2: Infrared Absorption Method after Combustion in an Induction Furnace (with Preheating)

4 Classification and Grade Expression Method

400/950 - specified minimum yield strength value/specified minimum tensile strength value, in MPa; TW - characteristic letters of "Twinning induced plasticity". […]

5 Ordering Content

5.1 The contract or ordering list that orders products as per this part include the following contents.

a) Product name (steel sheet and strip);

b) This Part's number;

c) Grade;

d) Specification and dimension, roughness;

e) Surface quality levels;

f) Surface structure;

g) Edge state;

h) Packaging mode;

i) Weight;

j) Usage;

k) Other special requirements.

5.2 If the following information are not specified in the ordering contract, such as dimension, roughness, surface quality level, surface structure type, edge state and package, etc.; then the products in this Part shall be delivered as per the ordinal dimension, roughness accuracy, relative high surface, pitting surface structure, cutting edge state, and packaged as per the packaging mode provided by the supplier.

6 Dimension, Shape, Weight

The dimension, shape, weight and allowable weight of steel sheet and strip shall conform to the provisions of GB/T 708. […]