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GB/T 713.3-2023 English PDF (GBT713.3-2023)

GB/T 713.3-2023 English PDF (GBT713.3-2023)

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GB/T 713.3-2023: Steel plate, sheet and strip for pressure equipments - Part 3: Low alloy steel with specified low temperature properties

This document stipulates the designation representation, order content, size, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of low alloy steel plates with specified low temperature properties for pressure equipment. This document is applicable to the manufacture of low-alloy steel plates (hereinafter referred to as steel plates) ??C with an operating temperature of not less than -70 ????C and a thickness of 5 mm ~ 120 mm ??C for pressure equipment.
GB/T 713.3-2023
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.140.50
CCS H 46
Replacing GB/T 3531-2014
Steel plate, sheet and strip for pressure equipments - Part 3:
Low alloy steel with specified low temperature properties
ISSUED ON: AUGUST 06, 2023
IMPLEMENTED ON: MARCH 01, 2024
Issued by: State Administration for Market Regulation;
Standardization Administration of the PEOPLE Republic of China.
Table of Contents
Foreword ... 3
Introduction ... 5
1 Scope ... 7
2 Normative references ... 7
3 Terms and definitions ... 9
4 Designation representation ... 9
5 Order content ... 9
6 Size, shape, weight ... 9
7 Technical requirements ... 10
8 Test methods ... 12
9 Inspection rules ... 13
10 Packaging, marking and quality certificate ... 14
Appendix A (Informative) Comparison table of similar designations between this document and relevant foreign standards ... 15
Steel plate, sheet and strip for pressure equipments - Part 3:
Low alloy steel with specified low temperature properties
1 Scope
This document stipulates the designation representation, order content, size, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of low alloy steel plates with specified low temperature properties for pressure equipment.
This document is applicable to the manufacture of low-alloy steel plates (hereinafter referred to as steel plates) ?€? with an operating temperature of not less than -70 ??C and a thickness of 5 mm ~ 120 mm ?€? for pressure equipment.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the version corresponding to that date is applicable to this document; for undated references, the latest version (including all amendments) is applicable to this document. 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 223.9, Iron, steel and alloy - Determination of aluminium content - Chrom azurol S photometric method
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 223.17, Methods for chemical analysis of iron, steel and alloy - The diantipyrylmethane photometric method for the determination of titanium 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 223.40, Iron, steel and alloy - Determination of niobium content by the sulphochlorophenol S spectrophotometric method
GB/T 223.63, Methods for chemical analysis of iron, steel and alloy - The sodium (potassium) periodate photometric method for the determination of manganese 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 223.69, Iron, steel and alloy - Determination of carbon contents - Gas- volumetric method after combustion in the pipe furnace
GB/T 223.76, Methods for chemical analysis iron, steel and alloy - The flame atomic absorption spectrometric method for the determination of vanadium content GB/T 228.1, Metallic materials - Tensile testing - Part 1: Method of test at room temperature
GB/T 229, Metallic materials - Charpy pendulum impact test method
GB/T 232, Metallic materials - Bend test
GB/T 713.1, Steel plate, sheet and strip for pressure equipments - Part 1: General requirements
GB/T 2975, Steel and steel products - Location and preparation of samples and 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 6803, Test method for drop-weight test to determine nil-ductility transition temperature of ferritic steels
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
NB/T 47013.3, Nondestructive testing of pressure equipments - Part 3: Ultrasonic testing
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 713.1 apply. 4 Designation representation
4.1 When named by strength: the designation of steel consists of the Chinese Pinyin initial ?€?Q?€? of ?€?Qu?€? (yield) representing the yield strength, the specified minimum lower yield strength value, and the Chinese Pinyin initials ?€?DR?€? of ?€?Di?€? (low) and ?€?Rong?€? (vessel) representing the low temperature pressure vessel.
Example: Q420DR. Where:
Q ?€? the Chinese Pinyin initial of ?€?Qu?€? (yield) representing the yield strength; 420 ?€? the specified minimum lower yield strength, in megapascals (MPa); DR ?€? the Chinese Pinyin initials of ?€?Di?€? (low) and ?€?Rong?€? (vessel).
4.2 When named by chemical composition: the designation of steel consists of two digits representing the average carbon content, the chemical element symbol representing alloy element letter, and the Chinese pinyin initials ?€?DR?€? of ?€?Di?€? (low) and ?€?Rong?€? (vessel) representing the low temperature pressure vessel.
Example: 11MnNiMoDR. Where:
11 ?€? average carbon content (in parts per 10,000);
MnNiMo ?€? manganese, nickel, molybdenum alloy element letters;
DR ?€? the Chinese Pinyin initials of ?€?Di?€? (low) and ?€?Rong?€? (vessel).
5 Order content
The order content of steel plates shall comply with the regulations of GB/T 713.1. 6 Size, shape, weight
The size, shape, and weight of steel plates shall comply with the regulations of GB/T 713.1.
7.4.3 The lateral expansion value shall be measured in the impact test of designations Q420DR and Q460DR, and the lateral expansion value shall not be less than 0.53 mm. 7.4.4 As negotiated between the supplier and the buyer, and specified in the contract, the low-temperature impact absorption energy of the steel plate can be delivered at a value higher than that in Table 2, and the specific value is specified in the contract. 7.4.5 When the supplier guarantees that the bending is qualified, the bending test does not need to be performed.
7.4.6 According to the requirements of the buyer, a set of impact tests with samples taken at 1/2 of the thickness of the steel plate can be added for steel plates with a thickness greater than 36 mm. The test temperature and impact absorption energy qualification value shall be specified in the contract.
7.4.7 According to the requirements of the buyer, an additional drop weight test can be added to steel plates with a thickness greater than 36 mm. The test shall be carried out in accordance with GB/T 6803 and P-2 type samples shall be used. The qualification index of the nil-ductility transition (NDT) temperature shall be noted in the contract. 7.5 Surface quality
The surface quality of steel plates shall comply with the regulations of GB/T 713.1. 7.6 Non-destructive testing
7.6.1 For steel plates of designations Q420DR and Q460DR with a thickness of 6 mm and above, steel plates delivered in a normalized or normalized + tempered state with a thickness greater than 20 mm, and steel plates delivered in a quenched and tempered state with a thickness greater than 16 mm, the supplier shall perform ultrasonic testing one by one.
7.6.2 Steel plates of other thicknesses can also be subjected to ultrasonic testing one by one upon negotiation between the supplier and the buyer.
7.6.3 Ultrasonic testing shall be carried out in accordance with NB/T 47013.3, and the qualification level shall not be lower than Level I. Special requirements, if any, shall be indicated in the contract.
8 Test methods
8.1 The chemical composition test of steel is generally conducted in accordance with GB/T 4336, GB/T 20123, GB/T 20125 or general chemical analysis methods. The arbitration is conducted in accordance with GB/T 223.3, GB/T 223.9, GB/T 223.12, GB/T 223.17, GB/T 223.23, GB/T 223.26, GB/T 223.40, GB/T 223.63, GB/T 223.68, GB/T 223.69 and GB/T 223.76.

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