Skip to product information
1 of 8

PayPal, credit cards. Download editable-PDF and invoice in 1 second!

GB/T 713.2-2023 English PDF (GBT713.2-2023)

GB/T 713.2-2023 English PDF (GBT713.2-2023)

Regular price $260.00 USD
Regular price Sale price $260.00 USD
Sale Sold out
Shipping calculated at checkout.
Quotation: In 1-minute, 24-hr self-service. Click here GB/T 713.2-2023 to get it for Purchase Approval, Bank TT...

GB/T 713.2-2023: Steel plate, sheet and strip for pressure equipments - Part 2: Non-alloy and alloy steel with specified temperature properties

This document specifies the designation representation, order content, size, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificates of non-alloy steel and alloy steel plates and strips with specified temperature properties for pressure equipment. This document is applicable to the manufacture of steel strips and coil-cut steel plates with a temperature of no less than -20 ????C and a thickness of no more than 25.4 mm for pressure equipment and single-rolled steel plates (hereinafter referred to as steel plates) with a thickness of 3 mm ~ 250 mm.
GB/T 713.2-2023
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.140.50
CCS H 46
Replacing GB/T 713-2014 and GB/T 35012-2018
Steel plate, sheet and strip for pressure equipments - Part 2:
Non-alloy and alloy steel with specified 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 ... 10
4 Designation representation ... 10
5 Order content ... 10
6 Size, shape, weight ... 10
7 Technical requirements ... 11
8 Test methods ... 17
9 Inspection rules ... 18
10 Packaging, marking and quality certificate ... 19
Appendix A (Informative) Comparison table of similar designations between this document and relevant foreign standards ... 20
Appendix B (Normative) Chromium-molybdenum alloy steel plate for hydrogen service ... 21
Appendix C (Normative) Hydrogen-induced cracking (HIC) resistance test and evaluation methods ... 23
Foreword
This document was drafted in accordance with the rules provided in GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.
This document is Part 2 of GB/T 713, Steel plate, sheet and strip for pressure equipments. The following parts have been issued for GB/T 713:
-- Part 1: General requirements;
-- Part 2: Non-alloy and alloy steel with specified temperature properties; -- Part 3: Low alloy steel with specified low temperature properties;
-- Part 4: Nickel-alloy steels with specified low temperature properties; -- Part 5: High manganese steel with specified low temperature properties; -- Part 6: Quenched and tempered high strength steel;
-- Part 7: Stainless steel and heat resisting steel.
This document replaces GB/T 713-2014, Steel plates for boilers and pressure vessels and GB/T 35012-2018, Chromium molybdenum alloy steel plate for hydrogen service equipment. This document is based on GB/T 713-2014 and integrates the contents of GB/T 35012-2018. Compared with GB/T 713-2014, in addition to structural adjustments and editorial changes, the main technical changes of this document are as follows:
a) Add Q460R and related technical requirements (see Table 1, Table 2, and Table 3);
b) Add technical requirements for high temperature mechanical properties of Q420R (see Table 3);
c) Add technical requirements for yield strength at test temperatures of 100 ??C and 150 ??C in high-temperature mechanical properties (see Table 3);
d) Add restrictions on the total amount of residual elements and microalloy elements in steel (see 7.1.6);
e) Change the impact absorption energy of each designation (see Table 2; Table 2 of GB/T 713-2014);
f) Add hydrogen-induced cracking (HIC) resistance test and evaluation (see Appendix C);
Steel plate, sheet and strip for pressure equipments - Part 2:
Non-alloy and alloy steel with specified temperature
properties
1 Scope
This document specifies the designation representation, order content, size, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificates of non-alloy steel and alloy steel plates and strips with specified temperature properties for pressure equipment.
This document is applicable to the manufacture of steel strips and coil-cut steel plates with a temperature of no less than -20 ??C and a thickness of no more than 25.4 mm for pressure equipment and single-rolled steel plates (hereinafter referred to as steel plates) with a thickness of 3 mm ~ 250 mm.
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 223.11, Iron, steel and alloy - Determination of chromium content - Visual titration or potentiometric titration 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 223.14, 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 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
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
The designation of carbon steel and low-alloy high-strength steel is represented by the yield strength value, the first letter of the Chinese Pinyin of the word ?€?Qu?€? (yield) and the first letter of the Chinese Pinyin of the word ?€?Rong?€? (vessel) of the pressure vessel, for example: Q345R.
The designation of molybdenum steel and chromium-molybdenum steel is represented by the average carbon content, the letters of alloying elements, and the first letter of the Chinese pinyin of the word ?€?Rong?€? (vessel) of the pressure vessel. For example: 15CrMoR
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.
Table 1 ?€? Chemical composition (continued)
7.1.2 For Q345R and Q370R steel plates with a thickness greater than 60 mm, the upper limit of carbon content can be increased to 0.22% and 0.20% respectively; for Q245R steel plates with a thickness greater than 60 mm, the upper limit of manganese content can be increased to 1.20%.
7.1.3 Trace amounts of niobium, vanadium and titanium can be added to Q245R, Q345R and Q370R steels, and their contents shall be stated in the quality certificate. The total content of the above three elements shall not exceed 0.050%, 0.120% and 0.150% respectively.
7.1.4 According to the requirements of the buyer, the nitrogen content of Q420R and Q460R steel plates shall not exceed 0.020% and 0.025% respectively.
7.1.5 According to the requirements of the buyer, an appropriate amount of rare earth elements can be added to 07Cr2AlMoR steel.
7.1.6 As residual elements, the contents of chromium, nickel and copper shall not exceed 0.30% respectively, and of molybdenum shall not exceed 0.080%; the total content of these elements shall not exceed 0.70%. If guaranteed by the supplier, the analysis is not required.
7.1.7 According to the requirements of the buyer, the carbon equivalent of the designations Q245R, Q345R, Q370R, Q420R and Q460R can be specified, and the value shall be determined by negotiation between the supplier and the buyer. 7.1.8 The allowable deviation of the chemical composition of finished steel products shall comply with the provisions of GB/T 713.1.
7.1.9 See Appendix A for a comparison of similar designations between this document and relevant foreign standards.
7.2 Manufacturing method
The manufacturing method of steel shall comply with the regulations of GB/T 713.1. 7.3 Delivery state
7.3.1 The delivery state of steel plates and steel strips shall be as specified in Table 2. 7.3.2 The tempering temperature of 18MnMoNbR and 13MnNiMoR steel plates shall not be lower than 620 ??C; the tempering temperature of 15CrMoR and 14Cr1MoR steel plates shall not be lower than 650 ??C; the tempering temperature of 12Cr2Mo1R, 12Cr1MoVR, 12Cr2Mo1VR and 07Cr2AlMoR steel plates shall not be lower than 680 ??C.
7.3.3 With the consent of the buyer, normalized and tempered steel plates with a thickness greater than 50 mm can be delivered normalized (accelerated cooling allowed) and tempered.
7.4 Mechanical and technological properties
7.4.1 The general requirements for various mechanical and technological properties of steel plates shall comply with the provisions of GB/T 713.1.
7.4.2 The results of the tensile test, Charpy (V-notch) impact test and bending test of steel plates shall comply with the requirements in Table 2.
7.4.3 For steel plates with a thickness greater than 60 mm, the bending test may not be required upon agreement between the supplier and the buyer and as stated in the contract.
7.4.4 For chromium-molybdenum alloy steel plates for hydrogen service equipment, the mechanical properties shall comply with the provisions of Appendix B. 7.4.5 According to the requirements of the buyer, steels of designations Q245R, Q345R and 13MnNiMoR can be subjected to -20 ??C impact test instead of the 0 ??C impact test in Table 2, and their impact absorption energy values shall comply with the provisions of Table 2.
7.4.6 According to the requirements of the buyer, steel plates with a thickness greater than 20 mm can be subjected to the high temperature tensile test, where the test temperature shall be specified in the contract. The specified plastic elongation strength (RP0.2) or lower yield strength (ReL) values at high temperature shall comply with the provisions of Table 3.
7.4.7 According to the requirements of the buyer, the thickness direction tensile test can be carried out, and the technical requirements shall be noted in the contract. 7.4.8 According to the requirements of the buyer, a drop weight test can be carried out, and the technical requirements shall be noted in the contract.
9 Inspection rules
9.1 Inspection and acceptance
The inspection of steel plates shall be carried out by the supplier?€?s quality inspection department.
9.2 Batch rules
9.2.1 Steel plates shall be accepted in batches. Each batch of steel plates is composed of steel plates of the same designation, the same heat number, the same thickness, the same rolling, and the same heat treatment system. The weight of each batch is not more than 30 t. Steel plates with a single weight exceeding 30 t shall be batched in a single piece.
9.2.2 Steel plates delivered in normalized (accelerated cooling allowed) and tempered conditions shall be batched based on heat treatment pieces one by one.
9.2.3 According to the requirements of the buyer and upon agreement between the supplier and the buyer, steel plates with a thickness greater than 16 mm can be tested for mechanical properties on a rolling piece basis.
9.3 Sampling rules
9.3.1 The sampling location for mechanical property testing shall be in accordance with the provisions of GB/T 2975. For steel plates with a thickness greater than 40 mm, the axis of the impact sample shall be located at 1/4 of the thickness. According to the requirements of the buyer and upon agreement between the supplier and the buyer, the axis of the impact sample can be located at 1/2 of the thickness.
9.3.2 The sampling quantity, sampling direction and sampling method of each batch of steel plates shall comply with the provisions of Table 4.
9.4 Re-inspection and determination
The re-inspection and determination rules of steel plates shall comply with the provisions of GB/T 713.1.
9.5 Numerical rounding
The numerical rounding rules for steel plates shall comply with the provisions of GB/T 713.1.

View full details