GB/T 38338-2019 English PDF

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GB/T 38338-2019: Test method for fracture toughness of carbon materials
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 38338-2019	199	Add to Cart	3 days	Test method for fracture toughness of carbon materials	Valid

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Basic data

Standard ID: GB/T 38338-2019 (GB/T38338-2019)
Description (Translated English): Test method for fracture toughness of carbon materials
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Q51
Classification of International Standard: 29.050
Word Count Estimation: 10,118
Date of Issue: 2019-12-10
Date of Implementation: 2020-07-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 38338-2019: Test method for fracture toughness of carbon materials

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Method for measuring fracture toughness of carbon materials) ICS 29.050 Q51 National Standards of People's Republic of China Method for measuring fracture toughness of carbon materials 2019-12-10 release 2020-07-01 implementation State Administration of Market Supervision Published by the National Standardization Management Committee

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard is proposed by China Iron and Steel Industry Association. This standard is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183). This standard was drafted. Sinosteel New Materials (Zhejiang) Co., Ltd., Anhui Hongchang New Materials Co., Ltd., China Pingmei Shenmaji Tuankaifeng Carbon Co., Ltd., Metallurgical Industry Information Standard Research Institute, Changzhou Xinneng Material Inspection and Testing Co., Ltd., Datong Yulinde Graphite New Materials Co., Ltd. The main drafters of this standard. Yang Hui, Huang Yan, Zheng Jingsu, Li Mao, Xu Hanchun, Xia Dexiang, Mao Yuzhen, Xu Jianping, Wu Jie, Cai Changhai, Lu Youchang, Du Aifang, Zhang Huibing, Xiao Xiaotian, and Chi Yide. Method for measuring fracture toughness of carbon materials

1 Scope

This standard specifies the terms and definitions of fracture toughness of carbon materials, equipment, sample requirements, test procedures, calculation of results and tests. report. This standard applies to the determination of fracture toughness of carbon materials at room temperature.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 1427 Carbon material sampling method GB/T 8170 Numerical rounding rules and expression and judgment of limit values

3 terms and definitions

The following terms and definitions apply to this document. 3.1 Fracture toughness K1C The critical stress intensity factor necessary for the growth of cracks under loading pressure is used to characterize the material's ability to prevent crack growth.

4 Equipment

4.1 Vernier caliper. measuring range 0mm ~ 300mm, accuracy 0.02mm. 4.2 Micrometer. Measuring range 0mm ~ 25mm, accuracy 0.01mm. 4.3 Image measuring instrument. Accuracy is 0.001mm, other measuring instruments with suitable magnification function are also available. 4.4 Drying box. With automatic temperature adjustment device, it can keep the temperature between 105 ℃ ~ 110 ℃. 4.5 Material testing machine. The accuracy of the sensor of the testing machine is less than or equal to 1%, and the recommended maximum load of the sample is 10% of the sensor range. 90%. The test fixture requirements are shown in Figure 1. The upper and lower fulcrum rollers can roll freely, and the roller diameter is 0.75 to 1.5 times the sample height. ......

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