GB/T 17107-1997 PDF EnglishUS$130.00 · In stock · Download in 9 seconds
GB/T 17107-1997: Structural steel grades and mechanical property for forgings Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure
Similar standardsGB/T 17107-1997: Structural steel grades and mechanical property for forgings---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/GBT17107-1997NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.140 H 40 Structural steel grades and mechanical property for forgings Issued on. NOVEMBER 11, 1997 Implemented on. MAY 01, 1998 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the PRC Table of ContentsForeword... 3 1 Scope... 4 2 Reference standards... 4 3 Grades and chemical composition... 4 4 Chemical composition deviation of finished product... 20 5 Mechanical properties... 22 6 Sampling locations of mechanical properties... 23 7 Sample... 26 8 Test methods... 26 9 Sampling quantity... 26 Appendix A (Normative) Reference standards for chemical analysis methods ... 271 ScopeThis Standard specifies the grades, chemical composition, chemical composition deviation of finished products, mechanical properties, and sampling locations of mechanical properties, etc. of structural steel for forgings. This Standard applies to general forgings for sampling determination of mechanical properties after integral heat treatment in metallurgical, mining, shipping, engineering machinery and other equipment. The mechanical properties of this Standard do not apply to forgings such as main shafts, rotors, impellers, and pressure vessels rotating at high temperature and high speed in power station equipment.2 Reference standardsThe following standards contain provisions which, through reference in this Standard, constitute provisions of this Standard. At the time of publication of this Standard, the editions shown are valid. All standards will be revised. Parties using this Standard shall explore the possibility of using the latest editions of the following standards. GB 223 Methods for chemical analysis of iron, steel and alloy (see Appendix A) GB 228-87 Metallic materials - Tensile testing GB/T 229-94 Metallic Material - Charpy notch impact test GB 231-84 Metallic materials - Brinell hardness test GB 6397-86 Metallic materials - Test pieces for tensile testing3 Grades and chemical composition3.1 The grades and chemical composition (smelting analysis) of carbon structural steel shall meet the requirements of Table 1. 3.2 The grades and chemical composition (smelting analysis) of alloy structural steel shall meet the requirements of Table 2.The content of sulfur, phosphorus, and residual copper, chromium, and nickel in steel shall meet the requirements of Table 3.4 Chemical composition deviation of finished product4.1 For the chemical composition deviation of the finished product, carbon structural steel forgings shall comply with the requirements of Table 4; alloy structural steel forgings shall comply with the requirements of Table 5. 4.2 When the purchaser needs to analyze the chemical composition of the finished product, the sample shall be taken from the forging body or its extension. For disk or solid forgings, it shall be taken between 1/2 radius to the outer surface.5 Mechanical properties5.1 The mechanical properties of carbon structural steel forgings shall meet the requirements of Table 1. 5.2 The mechanical properties of alloy structural steel forgings shall meet the requirements of Table 2. 5.3 Forgings must be inspected for mechanical properties before surface treatment after property heat treatment. 5.4 After the sample is removed, no heat treatment that affects the mechanical properties or various processing that affects the test results shall be performed.6 Sampling locations of mechanical properties6.1 The mechanical property samples shall be taken from the forging body or its lengthened, enlarged, and thickened parts. 6.2 The mechanical property samples are allowed to be taken on the blanks with the same smelting furnace number and the same heat treatment heat. The size of the blanks shall be equivalent to the size of the forging sampling location. 6.3 The longitudinal tensile sample of the forging, the center of the gauge length or the axis of the tangential tensile sample and the position of the notch surface of the impact sample shall be determined according to one of the following methods. 6.4 The sampling location of the transverse sample is specified according to the drawing of the purchaser. 6.5 For forgings with special requirements, the sampling location of mechanical properties shall be implemented according to the agreement between the two parties. 6.6 For forgings that have been normalized or normalized plus tempered, the heat-affected zone may not be removed.7 SampleThe size of the tensile and impact samples of the forgings shall meet the requirements of GB 6397 and GB/T 229.8 Test methods8.1 The chemical analysis tests shall comply with the standards in Appendix A (normative). 8.2 The tensile test shall meet the requirements of GB 228. 8.3 The impact test shall meet the requirements of GB/T 229.9 Sampling quantityThe sampling quantity of steel for forgings shall meet the requirements of product technical standards. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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