GB/T 713.2-2023 (English Version)

Standard No.: GB/T 713.2-2023
Language: Chinese, English version preview
Release Date: 2023
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 713.2-2023
Replace: GB/T 713-2014 GB/T 35012-2018

Scope: This document stipulates the designation methods for non-alloy steel and alloy steel plates and strips used in pressure equipment with specified temperature performance, ordering contents, dimensions,外形should be translated as 'outer appearance', weight, technical requirements, testing methods, inspection rules, packaging, marking, and quality certificates. This document applies to the manufacture of steel strips and rolled plates for pressure equipment with a thickness not exceeding 25.4 mm at temperatures no lower than -20℃, and single-rolled plates with a thickness ranging from 3 mm to 250 mm (hereinafter referred to as plates).

Introduction

GB/T 713.2-2023 Standard Interpretation

1. Standard Background and Technology Evolution Analysis

Pressure equipment is an important basic equipment of the national economy, and its safe operation is directly related to the safety of life and property. As the basic standard for steel plates and steel strips for pressure equipment, the GB/T 713 series of standards have undergone many revisions and improvements. The release of GB/T 713.2-2023 mainly targets non-alloy steel and alloy steel with specified temperature performance, integrates the contents of GB/T 713-2014 and GB/T 35012-2018, and adds a number of technical requirements, such as Q460R technical indicators, high temperature mechanical properties test, etc.

As pressure equipment develops towards large-scale and high-parameter directions, the performance requirements for materials are becoming increasingly stringent. The introduction of GB/T 713.2-2023 further standardizes the technical requirements for materials and provides stricter guarantees for the use of materials in boilers, pressure vessels, LNG ships and other fields.

Technical requirements	GB/T 713-2014	GB/T 35012-2018	GB/T 713.2-2023
Q460R Technical Indicators	None	None	Newly added, see Table 1 and Table 2 for details
High temperature mechanical properties	Partial requirements	Not covered	New test temperature points (100°C and 150°C), see Table 3 for details
Hydrogen Induced Cracking (HIC) Test	Not specified	Not specified	Newly added, see Appendix C for details

2. Interpretation of Core Technical Requirements

The main technical changes of GB/T 713.2-2023 include:

Newly added Q460R technical requirements: The chemical composition, mechanical properties and high temperature performance indicators are clarified, and it is suitable for pressure-bearing equipment with a service temperature of not less than -20°C.
High-temperature mechanical properties enhancement: The yield strength requirements at 100°C and 150°C are added to ensure the safety and reliability of the material in high temperature environments.
Residual element restrictions: The total content of residual elements such as chromium, nickel, and copper is strictly controlled to ensure the purity and performance stability of the material.
Hydrogen induced cracking test: A new HIC assessment method is added, and the test is carried out using standard solution A. For specific requirements, see Appendix C.

Example:For Q460R steel plate, when the thickness is 20-30 mm, the tensile strength shall be no less than 610 MPa, and the yield strength (Rp0.2) shall be no less than 520 MPa.

3. Implementation suggestions

To ensure the effective implementation of GB/T 713.2-2023 standard, it is recommended that:

Suppliers:Strictly control the chemical composition of raw materials, strengthen the testing of high temperature mechanical properties and HIC tests, and ensure that the products meet the standard requirements.
Manufacturers:Specify the technical requirements when placing orders, especially for high-risk use environments, it is recommended to add additional test items (such as HIC tests).
Testing institutions: Establish a complete high-temperature mechanical properties and HIC assessment capability to ensure the accuracy and reliability of test data.

In addition, it is recommended that enterprises negotiate with suppliers to develop personalized technical agreements based on their own needs, and clarify sampling methods, test conditions and qualification criteria.

GB/T 713.2-2023 Referenced Document

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 20124 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas (Routine method)
GB/T 20125 Low-alloy steel.Determination of multi-element contents.Inductively coupled plasma atomic emission spectrometric method
GB/T 223.11 Determination of chromium content in iron, steel and alloy by visual titration or potentiometric titration
GB/T 223.12 Methods for chemical analysis of iron,steel and alloy--The sodium carbonate separation-diphenyl carbazide photometric method for the determination of chromium content
GB/T 223.14 Methods for chemical analysis of iron,steel and alloy The N-benzoy-N-phenylhydroxylamine extraction photometric method for the determination of vanadium content
GB/T 223.17 Methods for chemical analysis of iron,steel and alloy--The diantipyrylmethane photometric method for the determination of titanium content
GB/T 223.18 Methods for chemical analysis of iron steel and alloy.The sodium thiosulfate separation iodimetric method for the determination of cupper content
GB/T 223.19 Methods for chemical analysis of iron,steel and alloy--The neocuproine-chloroform extraction photometric method for the determination of copper content
GB/T 223.23 Iron,,steel and alloy.Determination of nickel content.The dimethylglyoxime spectrophotometric method
GB/T 223.26 Iron,steel and alloy.Determination of molybdenum content.The thiocyanate spectrophotometric method
GB/T 223.3 Methods for chemical analysis of iron, steel and alloy--The diantipyrylmethane phosphomolybdate gravimetric method for the determination of phosphorus content
GB/T 223.31 Iron,steel and alloy.Determination of arsenic content.Distillation-molybdenum blue spectrophotometric method
GB/T 223.37 Iron, steel and alloy—Determination of nitrogen content—Indophenol blue spectrophotometric method after distillation separation
GB/T 223.40 Iron, steel and alloy Determination of niobium content by the sulphochlorophenol S spectrophotometric method
GB/T 223.47 Methods for chemical analysis of iron,steel and alloy. The carrier precipitation-molybdenum blue potometric method for the determination of antimony content
GB/T 223.50 Methods for chemical analysis of iron, steel and alloy. The phenylfluorone-CTMAB direct photometric method for the determination of tin content
GB/T 223.53 Methods for chemical analysis of iron,steel and alloy--The flame atomic absorption spectrophotometric method for the determination of copper content
GB/T 223.60 Steel and alloys - Determination of silicon content - Gravimetric method*， 2024-04-25 Update
GB/T 223.62 Methods for chemical analysis of iron, steel and alloy--The butyl acetate extraction photometric method for the determination of phosphorus content
GB/T 223.63 Iron, steel and alloy—Determination of manganese content—Sodium (potassium) periodate spectrophotometric method
GB/T 223.67 Iron,steel and alloy.Determination of sulfur content.Methylene blue spectrophotometric method
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 223.69 Iron,steel and alloy.Determination of carbon contents.Gas-volumetric method after combustion in the pipe furnace
GB/T 223.75 Iron,steel and alloy.Determination of boron content. Methanol distillation-curcumin photometric method
GB/T 223.76 Methods for chemical analysis iron,steel and alloy.The flame atomic absorption spertrometric method for the determination of vanadium content
GB/T 223.77 Methods for chemical analysis iron,steel and alloy.The flame atomic absorption spertrometric method for the determination of calcium content
GB/T 223.80 Iron,steel and alloy-Determination of trace bismuth and arsenic contents- Hydride generation-atomic fluorescence spectrometric method
GB/T 223.82 Steel and iron.Determination of hydrogen content.Thermal conductivity/infrared method after fusion under inert gas
GB/T 223.9 Iron,steel and alloy.Determination of aluminium content.Chrome azurol S photometric method
GB/T 228.1 Metallic materials—Tensile testing—Part 1: Method of test at room temperature
GB/T 228.2 Metallic materials.Tensile testing.Part 2:Method of test at elevated temperature
GB/T 229 Metallic materials—Charpy pendulum impact test method
GB/T 232 Metallic materials - Bend test methods*， 2024-03-15 Update
GB/T 2975 Steel and steel products - Location and preparation of samples and test pieces for mechanical testing
GB/T 4336 Determination of multi-element content in carbon steel and medium and low alloy steel Spark discharge atomic emission spectrometry (conventional method) Amendment No. 1
GB/T 5313 Thickness direction performance steel plate*， 2023-09-07 Update
GB/T 6803 Test method for drop-weight test to determine nil-ductility transition temperature of ferritic steels*， 2023-12-28 Update
GB/T 713.1 Steel plates and strips for pressure equipment - Part 1: General requirements
GB/T 8650 Evaluation of pipeline and pressure vessel steels for resistance to hydrogen-induced cracking
NB/T 47013.3 Nondestructive testing of pressure equipment Part 3: Ultrasonic testing*， 2023-12-28 Update

GB/T 713.2-2023 history

2023 GB/T 713.2-2023 Steel plates and strips for pressure equipment - Part 2: Non-alloy and alloy steels with specified temperature properties

GB/T 713.2-2023 Steel plates and strips for pressure equipment - Part 2: Non-alloy and alloy steels with specified temperature properties has been changed from GB/T 35012-2018 Chromium molybdenum alloy steel plate for hydrogen service equipment.

GB/T 713.2-2023