GB/T 713.2-2023Steel plate, sheet and strip for pressure equipment - Part 2: Non-alloy and alloy steel with specified elevated temperature properties (English PDF)

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 Scope

Part 2 of China's national series on steel for pressure equipment, covering non-alloy and alloy steels with specified elevated temperature properties. A pressure vessel operating hot is designed against strength values at its working temperature, not at room temperature, and that is the whole reason this category exists: an ordinary structural plate has no guaranteed yield strength at 400 degrees C, and above about that temperature creep begins to govern, so the material's behaviour over the vessel's whole design life becomes the design basis rather than a single test result. The steels covered run from carbon plate for moderate service to the chromium-molybdenum grades used in refinery and power plant vessels, where molybdenum's resistance to creep and chromium's to hydrogen attack are what make the service possible at all. The part specifies the designation system, order content, dimensions, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificates, for service at or above -20 degrees C, in strip and cut coil up to 25.4 mm and single-rolled plate from 3 to 250 mm.

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 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

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.

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.

8 Test methods

8.1 The chemical composition test of steel is generally carried out in accordance with GB/T 4336, GB/T 20123, GB/T 20124, GB/T 20125 or other general methods.

8.2 The test methods for the inspection items of each batch of steel plates shall comply with the provisions of Table 4.

9 Inspection rules

9.1 Inspection and acceptance The inspection of steel plates shall be carried out by the supplier's quality inspection department.

10 Packaging, marking and quality certificate

Note 1. 2. **Search (Optional).** Enter the keyword '**GB/T 713.2-2023**' in the search bar, if it is not already shown. 3.

Note 2. 9.

Note 3. 10. **Verification (USD

Notes and Explanations

Note 3:** If you are unable to redirect back to our Return Page, do not worry. **Additionally and independently**, our automated system will still deliver your PDF and Invoice via email **(the second mechanism to ensure the delivery)**, typically within 3 minutes. Once your payment is complete, you have two instant ways to access your PDF and invoice: you may stay on the Return Page for download in 3 minutes typically, or simply check your email inbox where a copy is automatically delivered in 3 minutes typically.