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GB/T 6417.1-2005: Classification and explanation of imperfections in fusion welded joints 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 6417.1: Historical versions
Similar standardsGB/T 6417.1-2005: Classification and explanation of imperfections in fusion welded joints---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/GBT6417.1-2005GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 25.160.40 J 33 GB/T 6417.1-2005 / ISO 6520-1.1998 Replacing GB/T 6417-1986 Classification and explanation of imperfections in fusion welded joints (ISO 6520-1.1998, Welding and allied processes - Classification of geometric imperfections in metallic materials - Part 1. Fusion welding, IDT) Issued on: AUGUST 10, 2005 Implemented on: APRIL 1, 2006 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration Committee. Table of ContentsForeword ... 3 1 Scope ... 4 2 Normative references ... 4 3 Definitions ... 4 4 Classification and symbol of imperfection ... 4 5 Representation ... 5 Annex A ... 20ForewordThis Part is identical to ISO 6520-1.1998 Welding and allied processes - Classification of geometric imperfections in metallic materials - Part 1. Fusion welding (English version). This Part makes necessary editorial changes when conducting equivalent conversion of the international standard, so as to ensure the coordination and operability of the standard. Compared with ISO 6520-1.1998, the main changes in content of this Part are as follows. - Based on welding terms of GB/T 3375, this Part more-accurately defines “welding imperfection” and “welding defect”; - Annex A makes specific instructions on crack category and recommends the internationally-accepted defect back-sheet reference assessment code system. This Part is an amendment to GB/T 6417-1986 Classification and explanation of imperfections in fusion welded joints. Compared with GB/T 6417-1986, the two main changes are as follows. - Added new welding imperfection categories; - Refined the previous welding imperfection. Since the implementation of this Part, it replaces GB/T 6417-1986. Annex A of this Part is informative. This Part was proposed by China Machinery Industry Federation. This Part shall be under the jurisdiction of National Technical Committee on Welding of Standardization Administration of China. The drafting organization of this Part. Harbin Welding Institute. Main drafter of this Part. Piao Dongguang. This Part was issued in 1986 for the first time. This Standard is the first revision. Classification and explanation of imperfections in fusion welded joints1 ScopeThis Part will serve as the basis for a precise classification and description of weld imperfections in fusion welded joints. This Part applies to various welding imperfections in fusion welded joints. Other imperfections (e.g. metallurgical imperfections) are not included.2 Normative referencesThe following standards contain the provisions which, through reference in GB/T 6417, constitute the provisions of this Part. For dated references, the subsequent amendments (excluding corrections) or revisions do not apply to this Standard. However, the parties who enter into agreement based on this Part are encouraged to investigate whether the latest versions of these documents are applicable. For undated reference documents, the latest versions apply to this Part. GB/T 3375 Welding terminology3 DefinitionsIn addition to the terms of GB/T 3375, the following definitions also apply. 3.1 welding imperfection any deviation from the ideal weld, e.g., discontinuous weld, loose weld or bad connection; “imperfection” for short; 3.2 welding defect imperfection that exceeds stipulated limits.4 Classification and symbol of imperfectionAccording to its nature, welding imperfection can be classified into 6 groups.Annex A(Informative) Classification of cracks This annex lists cracks during or after welding. When a full description of cracking is necessary, it is recommended that a combination of the classification numbers according to Table 1 with the letters used in Table A.1 be used. International Institute of Welding (IIW) usually uses this reference code system to access radiographs. Table A.1 Classification and explanation of welding cracks Reference code Name and explanation E Weld cracking (Cracks occurring during or after welding) Ea - hot crack Eb - solidification crack Ec - liquation crack Ed - precipitation induced crack Ee - age hardening crack Ef - cold crack Eg - ductility-dip crack (brittle crack) Eh - shrinkage crack Ei - hydrogen induced crack Ej - lamellar tearing Ek - toe crack El - ageing induced crack (nitrogen diffusion crack) ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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