GB/T 25774.1-2023 PDF EnglishUS$170.00 · In stock · Download in 9 seconds
GB/T 25774.1-2023: Test methods for welding consumables - Part 1: Preparation of deposited metal test pieces and specimens for mechanical properties in steel, nickel and nickel alloys Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 25774.1: Historical versions
Similar standardsGB/T 25774.1-2023: Test methods for welding consumables - Part 1: Preparation of deposited metal test pieces and specimens for mechanical properties in steel, nickel and nickel alloys---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT25774.1-2023 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 25.160.20 CCS J 33 Replacing GB/T 25774.1-2010 Test Methods for Welding Consumables - Part 1. Preparation of Deposited Metal Test Pieces and Specimens for Mechanical Properties in Steel, Nickel and Nickel Alloys (ISO 15792-1.2020, Welding Consumables - Test Methods - Part 1.Preparation of All-weld Metal Test Pieces and Specimens in Steel, Nickel and Nickel Alloys, MOD) Issued on: NOVEMBER 27, 2023 Implemented on: JUNE 1, 2024 Issued by. State Administration for Market Regulation; Standardization Administration of the People’s Republic of China. Table of ContentsForeword... 3 Introduction... 6 1 Scope... 7 2 Normative References... 7 3 Terms and Definitions... 7 4 General... 7 5 Base Material for Tests... 8 6 Specimen Preparation... 8 7 Welding Conditions... 9 8 Thermal Treatment... 9 9 Sampling Positions and Specimen Dimensions... 9ForewordThis 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 1 of GB/T 25774 Test Methods for Welding Consumables. GB/T 25774 has issued the following parts. ---Part 1.Preparation of Deposited Metal Test Pieces and Specimens for Mechanical Properties in Steel, Nickel and Nickel Alloys; ---Part 2.Preparation of Butt Weld Single-run and Two-run Technique Test Pieces and Specimens for Mechanical Properties in Steel; ---Part 3.Preparation and Testing of a Fillet Weld Specimens for T-joint. This document serves as a replacement for GB/T 25774.1-2010 Test Methods for Welding Consumables - Part 1.Preparation and Testing of Deposited Metal Specimens for Mechanical Properties in Steel, Nickel and Nickel Alloys. In comparison with GB/T 25774.1-2010, apart from structural adjustments and editorial modifications, the main technical changes are as follows. a) The types of test pieces 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8 and 2.9 are deleted (see Chapter 5 of Version 2010); b) The test plate widths for types 1.3 and 1.4 are modified (see 6.1; Chapter 5 of Version 2010); c) The allowable deviations for test plate thickness and root gap are added (see 6.1); d) The symbol and dimensional tolerances for the diameter of tensile specimens are modified (see 9.2; Chapter 8 of Version 2010); e) The shape tolerances for the diameter of tensile specimens are added (see 9.2); f) The symbols for the dimensions of V-notch impact specimens are modified (see 9.3; Chapter 8 of Version 2010); g) A technical requirement for the allowable deviations of machining for automatically positioned impact specimens is added (see 9.3); h) Re-inspection and test report are deleted (see Chapter 9 and Chapter 10 of Version 2010). This document modifies and adopts ISO 15792-1.2020 Welding Consumables - Test Methods - Part 1.Preparation of All-weld Metal Test Pieces and Specimens in Steel, Nickel and Nickel Alloys. Test Methods for Welding Consumables - Part 1. Preparation of Deposited Metal Test Pieces and Specimens for Mechanical Properties in Steel, Nickel and Nickel Alloys1 ScopeThis document specifies the preparation of deposited metal tensile and impact specimens of steel, nickel and nickel alloy welding consumables. This document applies to the preparation of specimens for arc welding consumable classification tests of steel, nickel and nickel alloys, or for other tests of determining the mechanical properties of deposited metal.2 Normative ReferencesThe contents of the following documents constitute indispensable clauses of this document through the normative references in the text. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document. GB/T 2650-2022 Destructive Tests on Welds in Metallic Materials - Impact Tests (ISO 9016.2022, MOD) GB/T 2652 Destructive Tests on Welds in Metallic Materials - Longitudinal Tensile Test on Weld Metal in Fusion Welded Joints (GB/T 2652-2022, ISO 5178.2019, IDT) GB/T 18591 Welding - Guidance on the Measurement of Preheating Temperature, Interpass Temperature and Preheat Maintenance Temperature (GB/T 18591-2001, ISO 13916.1996, IDT)3 Terms and DefinitionsThis document does not have terms or definitions that need to be defined.4 GeneralThe welding consumables under test shall be representative of the products required for classification or inspection by the manufacturer. Tensile and impact specimens of deposited metal shall be prepared in accordance with the requirements of this document.5 Base Material for TestsThe base material for tests shall match the deposited metal of the welding consumables under test. If other base materials are used, at least two insulating layers shall be welded to the groove face and the backing plate surface using the welding consumables under test. The thickness of the insulating layers after machining shall be no less than 3 mm to ensure that the deposited metal is not affected by dilution of the base material.6 Specimen Preparation6.1 The specimens shall be prepared in a V-groove configuration with a backing plate. The backing plate shall be welded to the back of the test piece, as shown in Figure 1 and Table 1. 6.2 To prepare specimens, before welding, the test plate shall be backward deformed or restrained to ensure that the prepared test pieces are sufficiently flat. After welding, the test pieces shall not be straightened, and test pieces with angular deformation exceeding 5 shall be scrapped. 6.3 The types and dimensions of the test pieces are shown in Table 1.The types of test pieces selected for welding consumable classification shall comply with the provisions of the relevant product standards.7 Welding Conditions7.1 The test pieces shall be prepared in the flat welding position. Unless otherwise specified in the product standards of welding consumables, welding in other positions is permitted. 7.2 When welding is initiated, the test plate shall be heated to a preheat temperature specified in the product standards of welding consumables and maintained at the interpass temperature specified in the product standards during welding. If the test plate temperature exceeds the specified temperature, it shall be naturally cooled. If welding must be interrupted, the test plate shall be heated to the specified interpass temperature when re-welding. In accordance with the provisions of GB/T 18591, use a surface thermometer, temperature probe or thermocouple to measure the preheat temperature and interpass temperature. The recommended temperature measurement point is the longitudinal center of the test pieces, 25 mm from the center of the weld.8 Thermal Treatment8.1 Except for dehydrogenation treatment, thermal treatment shall be performed on the test pieces or after mechanical cutting. 8.2 Thermal treatment shall be performed in accordance with the provisions of product standards of welding consumables.9 Sampling Positions and Specimen Dimensions9.1 The sampling position for tensile specimens is shown in Figure 2, and the sampling position for V-notch impact specimens is shown in Figure 3.The mechanical or thermal cutting method ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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