GB/T 229-2020 PDF EnglishUS$365.00 · In stock · Download in 9 seconds
GB/T 229-2020: Metallic materials - Charpy pendulum impact test method 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 229: Historical versions
Similar standardsGB/T 229-2020: Metallic materials - Charpy pendulum impact test method---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/GBT229-2020GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.040.10 H 22 Replacing GB/T 229-2007 Metallic materials - Charpy pendulum impact test method (ISO 148-1.2016, Metallic materials - Charpy pendulum impact test - Part 1. Test method, MOD) Issued on. SEPTEMBER 29, 2020 Implemented on. APRIL 04, 2021 Issued by. State Administration for Market Regulation; Standardization Administration of PRC. Table of ContentsForeword... 4 1 Scope... 8 2 Normative references... 8 3 Terms and definitions... 8 3.1 Energy-related definitions... 8 3.2 Definitions related to specimens... 9 4 Symbols and description... 11 5 Test principle... 12 6 Specimen... 13 6.1 General requirements... 13 6.2 Notch geometry... 14 6.3 Deviation of specimen size... 14 6.4 Preparation of specimens... 15 6.5 Marking of specimens... 15 7 Test equipment... 15 7.1 General requirements... 15 7.2 Installation and calibration... 15 7.3 Pendulum blade... 16 8 Test procedure... 16 8.1 General requirements... 16 8.2 Determination of friction loss... 16 8.3 Test temperature... 18 8.4 Transfer of specimens... 18 8.5 Capability range of testing machine... 19 8.6 Incomplete fracture of specimen... 20 8.7 Pendulum jammed by specimen... 20 8.8 Post-fracture inspection... 20 8.9 Test results... 21 9 Test report... 21 9.1 Necessary content... 21 9.2 Optional content... 21 Appendix A (Informative) Self-centering clamp... 23 Appendix B (Informative) Lateral expansion value... 24 Appendix C (Informative) Shear section rate... 28 Appendix D (Informative) Absorbed energy-temperature curve and transition temperature... 31 Appendix E (Informative) Measurement uncertainty of absorbed energy value K... 33 References... 42ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 229-2007 "Metallic materials - Charpy pendulum impact test method". Compared with GB/T 229-2007, the main technical changes are as follows. - In the scope, ADD the unnotched specimens; MAKE requirements for the terms and definitions, symbols and descriptions, dimensional deviations, specimen installation of unnotched specimens (see Chapter 1, 3.2.1, Table 1, Table 2, 8.1, Appendix A); - MODIFY and ADD some terms and definitions (see 3.1.3, 3.2.1, 3.2.2; 3.2.1, 3.2.2 of the 2007 edition); - ADD the symbol B of specimen thickness; ADD the symbol α of the angle when the pendulum is released; ADD the description of the elevation angle β1 and β2; ADD the symbol KN of the nominal value of the initial potential energy; ADD the symbol M of the moment; ADD the energy loss symbol p caused by pointer friction, the energy loss symbol p' caused by bearing friction and air resistance, the correction symbol pβ for the energy loss caused by the elevation angle β; MODIFY the symbol of shear section rate, which is changed to SFA; ADD the transition temperature symbol Tt27 corresponding to the specified absorption energy value of 27J, the transition temperature symbol Tt50%US corresponding to 50% of the energy absorbed on the upper platform, the transition temperature symbol Tt50%SFA corresponding to the shear section rate of 50%, the transition temperature symbol Tt0.9 corresponding to lateral expansion value 0.9 mm (see Table 1; Table 1 of the 2007 edition); - SUPPLEMENT and IMPROVE the principle of impact test (see Chapter 5; Chapter 5 of the 2007 edition); - ADD the determination of friction loss (see 8.2); - MODIFY the test temperature requirements (see 8.3.3; 8.2.3 of the 2007 edition); - ADD the necessary and optional content of the test report [see 9.1 g), 9.2 j), k)]; - ADD the Informative Appendix E "Measuring uncertainty of absorbed energy value K" (see Appendix E); - DELETE the Informative appendix of the high temperature or low temperature compensation value (see Appendix E of the 2007 edition). This standard uses the redrafting method to amend and adopt ISO 148-1.2016 "Metallic materials - Charpy pendulum impact test - Part 1.Test method". Compared with ISO 148-1.2016, this standard has structural differences, adding clause 8.9 test results. Compared with ISO 148-1.2016, this standard has technical differences. The terms involved in these differences have been marked by a vertical single line (|) on the outer margins. The technical differences between this standard and ISO 148-1.2016 and the reasons are as follows. - In the scope of Chapter 1, ADD the unnotched specimens to suit China's national conditions; - Regarding normative references, this standard has adjusted the technical differences to adapt to Chinese technical conditions. The adjustments are reflected in Chapter 2 "Normative references". The specific adjustments are as follows. ● USE GB/T 3808 which adopts the international standard through modification to replace ISO 148-2 (see 7.2, E.2.1.2); ● ADD the reference to GB/T 2975 (see 6.4); ● ADD the reference to GB/T 8170 (see 8.9); ● ADD the reference to JJG 145 (see 7.2); ● DELETE the ISO 268-1 (see Table 2 of ISO 148-1). - In Table 1, ADD the symbols KT and descriptions that were missed in the ISO standard; ADD the symbols and descriptions of the unnotched specimens correspondingly due to the addition of unnotched specimen in the Scope; CLARIFY the units of β1 and β2 as "°" and the unit of K1, K2, KN as "J", to avoid unit confusion; - MODIFY the last two paragraphs of the principle of Chapter 5 to be a note, because this part of the content is a further explanation of the principle; - In 6.1.2, ADD the "specimens of other thicknesses can also be used through agreement", to expand the scope of application of this standard; - In 6.4, ADD that "the cutting of specimen blanks shall be carried out in accordance with the relevant product standards or the provisions of GB/T 2975" for the convenience of actual operation; - In Table 2, ADD the size and tolerance of U-notch specimens which have a ligament width of 8 mm; ADD the notes for unnotched specimens; ADJUST the angle tolerance between adjacent longitudinal surfaces of the specimen; DELETE the tolerance grades of the two notches, to meet China's national conditions; - For the convenience of application, ADD the symbols KW2 and KW8 used for the pendulum hammer blade of the unnotched specimen in 7.3; - In order to facilitate the operation of the application of unnotched specimens, ADD the requirements for the installation position of unnotched specimens and the pre-test inspection requirements in 8.1; - ADD the detailed requirements for bearing friction and windage loss in 8.2.2, to facilitate the implementation of the standard; - In 8.5, ADD the lower limit of use of the testing machine and the requirements for resolution; ADD note 2 to explain it, to improve the operability of the standard and facilitate the implementation of the standard; - In order to increase the operability, ADD the description in 8.6 when the pendulum does not break the specimen due to insufficient impact energy of the testing machine and the measured absorbed energy exceeds the energy range of the testing machine; - In 8.9, ADD the energy-absorption rounding-off requirements to improve the standard operability; - In 9.1, ADD the item c) notch type and ligament width (notch depth); in item d), ADD the requirement for expression method of specimen size, to improve the standard operability; - In Appendix A, DELETE the sentence "the size of the centering clamp with thickness of 5 mm and 3 mm" due to data errors; ADD the requirements for clamps for unnotched specimens; ADD the requirements for clamps for U- notches, to improve the standard operability, to facilitate the implementation of standards. This standard has made the following editorial changes. - MODIFY the standard name; - In the note of 3.1.2, ADD the expression that "use the letter W to represent unnotched specimens". This standard was proposed by the China Iron and Steel Association. This standard shall be under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC 183). Drafting organizations of this standard. Central Iron and Steel Research Institute, Metallurgical Industry Information Standards Institute, Shanxi Taigang Stainless Steel Co., Ltd., Shanghai Shenli Testing Machine Co., Ltd., Shenzhen Wance Testing Equipment Co., Ltd., Nanjing Iron and Steel Co., Ltd., National Iron and Steel Co., Ltd. Product Quality Supervision and Inspection Center, Pabo Testing Technology Service Co., Ltd., Lixi (Shanghai) Scientific Instrument Co., Ltd., Qiqihar Huagong Machine Tool Co., Ltd., Minmetals Yingkou Medium Plate Co., Ltd., Shougang Group Co., Ltd., Chengdu Iron and Steel Research Institute Testing and Certification Co., Ltd., Dalian Hope Physical and Chemical Testing Technology Co., Ltd., Shanghai Institute of Materials. The main drafters of this standard. Liu Tao, Gao Yifei, Dong Li, Wang Liying, Huang Xing, Li Jianfeng, Zhang Huawei, Zhang Xiaoli, Xu Liang, Wang Bin, Wang Hongliang, Zhong Yangyang, Qiu Yu, Yin Jianjun, Jia Yuanwei, Zhou Lifu, Wang Bin, Liang Caimeng, Zhang Qingshui, Hou Huining. This standard replaces the standard previously issued as follows. - GB/T 229-1984, GB/T 229-1994, GB/T 229-2007.1 ScopeThis standard specifies the Charpy pendulum impact test method for measuring the energy absorbed by impact specimens in the impact test of metallic materials.2 Normative referencesThe following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this standard. GB/T 2975 Steel and steel products - Location and preparation of specimens and test pieces for mechanical testing (GB/T 2975-2018, ISO 377.2017, MOD) GB/T 3808 Verification of pendulum-type impact testing machines (GB/T 3808-2018, ISO 148-2.2008, MOD) GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values JJG 145 Verification regulation of pendulum impact testing machines3 Terms and definitionsThe following terms and definitions apply to this document. 3.1 Energy-related definitions 3.1.1 Initial potential energy Potential energy Kp The potential energy of the pendulum before the impact test of the drop pendulum, which is determined by direct calibration. 3.1.2 Absorbed energy The energy required by the pendulum impact testing machine to break the specimen, which is the value after friction correction.4 Symbols and descriptionThe symbols and descriptions used in this document are as shown in Table 1. B, mm, Specimen thickness α, °, Angle when the pendulum is released5 Test principleThe test specified in this standard uses a single impact of a pendulum to break the specimen. The test conditions are given in Chapter 6, Chapter 7, Chapter 8.6 SpecimenThe length of the standard size impact specimen is 55 mm; the cross section is a square cross-section of 10 mm × 10 mm. There is a V-shaped or U-shaped notch in the middle of the specimen length, see 6.2.1 and 6.2.2.7 Test equipmentAll measuring instruments shall be traceable to national or international standards. The measuring instrument shall be calibrated within a suitable period.8 Test procedureThe specimen shall be close to the anvil of the testing machine; the distance between the symmetry plane of the specimen notch and the middle plane of the two anvils shall be no more than 0.5 mm.9 Test reportThe test report shall include the following or when the customer allows, the following information can be traced through the report number provided by the laboratory. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 229-2020 be delivered?Answer: The full copy PDF of English version of GB/T 229-2020 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 229-2020_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 229-2020_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 229-2020 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds.Question 5: Should I purchase the latest version GB/T 229-2020?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 229-2020 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.How to buy and download a true PDF of English version of GB/T 229-2020?A step-by-step guide to download PDF of GB/T 229-2020_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).Step 2: Search keyword "GB/T 229-2020". Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart. Step 4: Select payment option (Via payment agents Stripe or PayPal). Step 5: Customize Tax Invoice -- Fill up your email etc. Step 6: Click "Checkout". Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively. Step 8: Optional -- Go to download PDF. Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice. See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9 |
