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Similar standardsGB/T 27677-2017: Aluminium hardeners---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/GBT27677-2017GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.150.10 H 60 Replacing GB/T 27677-2011 Aluminium hardeners Issued on. MAY 31, 2017 Implemented on. DECEMBER 01, 2017 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the People’s Republic of China. Table of ContentsForeword... 3 1 Scope... 6 2 Normative references... 6 3 Terms and definitions... 7 4 Requirements... 7 5 Test methods... 30 6 Inspection rules... 31 7 Marking, packaging, transportation and storage... 33 8 Order form (or contract) contents... 34 Appendix A (Informative) Color identification of aluminium hardeners... 351 ScopeThis Standard specifies the requirements, test methods, inspection rules, as well as marking, packaging, transportation, storage, quality certificate and order form (or contract) contents for aluminium hardeners. This Standard applies to aluminium hardeners for cast aluminium alloys and wrought aluminium alloys. This Standard does not apply to aluminium-titanium-boron, aluminium-titanium- carbon and aluminium-titanium alloy wires for cast aluminium alloys and wrought aluminium alloys.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 1196, Unalloyed aluminium ingots for remelting GB/T 3199, Wrought aluminium and aluminium alloy products - Packing, marking, transporting and storing GB/T 3246.1, Inspection method for structure of wrought aluminum and aluminum alloy products - Part 1.Inspection method for microstructure GB/T 3246.1, Inspection method for structure of wrought aluminum and aluminum alloy products - Part 2.Inspection method for macrostructure3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply. 3.1 aluminium hardeners An alloy made of aluminium as a matrix and melted with other metals or non-metals at elevated temperatures. It is used to adjust and control the chemical composition and structure of cast aluminium alloys or wrought aluminium alloys.4 Requirements4.1 Product classification 4.1.1 Representation method of aluminium hardener designation The designation of aluminium hardeners is composed of “Al” + the symbol of the main alloying element + the nominal mass fraction of the main alloying element. The main alloying elements are arranged in descending order by their element mass fractions. 4.1.2 Groups and designations of aluminium hardeners Aluminium hardeners are divided into 39 groups according to the first main alloying element, as shown in Table 1. 4.1.3 Product category, dimensions and piece weight The category, dimensions and piece weight of aluminium hardeners shall comply with the requirements in Table 2.If the buyer requires other dimensions or weights, it shall be determined through negotiation between the supplier and the buyer, and noted in the order form (or contract). 4.1.4 Marking and examples The marking of aluminium hardeners is expressed in the order of product category, number of this Standard, designation of the aluminium hardener, designation of the raw aluminium ingot (which can be omitted when designation Al99.70 is selected), dimensions and piece weight. Examples of marking are as follows. 4.2 Chemical composition The chemical composition of the designation of aluminium hardeners shall comply with the requirements in Table 3. 4.5 Appearance The appearance of aluminium hardeners is not allowed to contain slag inclusions, corrosion, inclusions, oil stains or any foreign matter. It is allowed to have oxide films, wrinkles or shrinkage cracks that do not affect its use.5 Test methods5.1 Chemical composition 5.1.1 The chemical composition analysis method shall comply with the provisions of GB/T 20975 (all parts) or GB/T 7999.The arbitration analysis shall adopt the method specified in GB/T 20975 (all parts). 5.1.2 The determination of analysis value is based on the rounding comparison method; the value rounding rules shall be carried out in accordance with the relevant provisions of GB/T 8170; the rounding digit shall be consistent with the limit digits specified in Table 3. 5.2 Fracture structure Fracture structure shall be inspected in accordance with the provisions of GB/T 3246.2. 5.3 Microstructure Microstructure shall be inspected in accordance with the provisions of GB/T 3246.1. 5.4 Appearance Visually inspect the appearance under natural scattered light.6 Inspection rules6.1 Inspection and acceptance 6.1.1 The aluminium hardeners shall be inspected by the supplier to ensure that the quality of the aluminium hardeners complies with the provisions of this Standard and the order form (or contract), and a quality certificate shall be filled in. 6.2 Batch Aluminium hardeners shall be submitted for inspection in batches, and each batch shall be composed of aluminium hardeners of the same melting order. 6.3 Inspection items Each batch shall be inspected for chemical composition, fracture structure and appearance. Aluminium hardeners of designations AlTi6A, AlTi6, AlTi10A, AlTi10, AlTi5B1A, AlTi5B1, AlZr5A, AlZr5, AlZr10A, AlZr10, AlZr15A, and AlZr15 shall also be inspected for microstructure. When users have requirements for the microstructure of aluminium hardeners of other designations, the required aluminium hardeners shall be inspected for microstructure on a batch basis. 6.4 Sampling The sampling of aluminium hardeners shall comply with the requirements in Table 7. 6.5 Determination of the test result 6.5.1 When the chemical composition of any sample is unqualified, if the melting order of the product can be distinguished, judge the melting order that is represented by the sample as unqualified; inspect other melting orders in turn, and deliver the qualified ones. If the melting order cannot be distinguished, judge the batch as unqualified.7 Marking, packaging, transportation and storage7.1 Marking 7.1.1 Product marking The aluminium hardener that has passed the inspection shall be accompanied by the following imprint (or label). 7.1.2 Packaging markings The packaging box markings of aluminium hardeners shall comply with the regulations of GB/T 3199. 7.2 Packaging, transportation, storage 7.3 Quality certificate Each batch shall be accompanied by a quality certificate that meets the requirements of this Standard, stating.8 Order form (or contract) contentsThe order form (or contract) that orders the materials which are listed in this Standard shall include the following.Appendix A(Informative) Color identification of aluminium hardeners See Table A.1 for color identification of aluminium hardeners. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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