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GB/T 23806-2025 English PDF

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US$509.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 23806-2025: Test method for fracture toughness of fine ceramics at room temperature - Single edge precracked beam (SEPB) method
Status: Valid

GB/T 23806: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 23806-2025	509	Add to Cart	4 days	Test method for fracture toughness of fine ceramics at room temperature - Single edge precracked beam (SEPB) method	Valid
GB/T 23806-2009	559	Add to Cart	5 days	Fine ceramics (advanced ceramics, advanced technical ceramics) -- Test method for fracture toughness of monolithic ceramics at room temperature by single edge pre-cracked beam (SEPB) method	Valid

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Basic data

Standard ID: GB/T 23806-2025 (GB/T23806-2025)
Description (Translated English): Test method for fracture toughness of fine ceramics at room temperature - Single edge precracked beam (SEPB) method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Q30
Classification of International Standard: 81.060.30
Word Count Estimation: 25,249
Date of Issue: 2025-06-30
Date of Implementation: 2026-01-01
Older Standard (superseded by this standard): GB/T 23806-2009
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 23806-2025: Test method for fracture toughness of fine ceramics at room temperature - Single edge precracked beam (SEPB) 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/GBT23806-2025
ICS 81.060.30 CCSQ30 National Standard of the People's Republic of China Replaces GB/T 23806-2009 Test method for fracture toughness of fine ceramics Single-edge pre-cracked beam (SEPB) method Released on June 30, 2025, implemented on January 1, 2026 State Administration for Market Regulation The National Standardization Administration issued

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Principle 2 5 Test Equipment 2 6 Specimens and metal frame beams 4 7 Test Step 5 8 Validity of test results 9 9 Calculation 11 10 Test Report 12 Appendix A (Informative) Comparison of structure numbers between this document and ISO 15732.2003 13 Appendix B (Informative) Technical differences between this document and ISO 15732.2003 and their causes 15 Appendix C (Normative) Strain Induced Crack Prefabrication Test Device 17 Appendix D (Normative) Prefabricated Crack Operation Method 18 Appendix E (Informative) Y lw ÷ and F lw Quick lookup table of ÷ values 19 Reference 21 Preface This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document replaces GB/T 23806-2009 "Fine Ceramics Fracture Toughness Test Method Single Edge Precracked Beam (SEPB) Method" Compared with GB/T 23806-2009, in addition to structural adjustments and editorial changes, the main technical changes are as follows. a) The term and definition of “stress intensity factor” have been deleted (see 3.1 of the.2009 edition); b) The term and definition of “three-point bending” have been deleted (see 3.7 of the.2009 edition); c) Added the term and definition of “strain-induced crack prefabrication method” (see 3.7); d) The term and definition of “four-point bending” have been deleted (see 3.8 of the.2009 edition); e) Deleted the relevant descriptions of the bridge pressure method (see 3.10, 6.1, Appendix A of the.2009 edition); f) Added the strain-induced crack prefabrication method (see 7.3); g) The descriptions of surface indentation and single-sided straight-through cut in the crack initiation source have been deleted (see 8.2 of the.2009 edition); h) Added Appendix C (see Appendix C); i) Added Appendix D (see Appendix D). This document is modified to adopt ISO 15732.2003 “Fine ceramics (advanced ceramics, advanced technical ceramics) – Single-edge pre-cracked beams at room temperature” Test method for measuring fracture toughness of ceramics using the SEPB method. Compared with ISO 15732.2003, this document has many structural adjustments. See Appendix A. This document has many technical differences compared with ISO 15732.2003. A list of these technical differences and their causes is given in Appendix B. The following editorial changes have been made to this document. a) To coordinate with the existing standard, the name of the standard is changed to "Test Method for Fracture Toughness of Fine Ceramics - Single Edge Precracked Beam (SEPB) Method"; b) The formula form is simplified [see formula (7) and formula (10)]; c) Added Appendix E (Informative) "Y lw ÷ and F lw "Quick lookup table of ÷ values". Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document is proposed by China Building Materials Federation. This document is under the jurisdiction of the National Technical Committee for Standardization of Industrial Ceramics (SAT/TC194). This document was drafted by. China National Testing and Inspection Holding Group Co., Ltd., Hefei Huizhi New Materials Technology Co., Ltd., Jingdezhen Ceramic Porcelain University, Shandong Industrial Ceramics Research and Design Institute Co., Ltd., Fanrui Yunzhi Technology (Zhengzhou) Co., Ltd., Shanxi Wujian Group Co., Ltd., Shanghai Institute of Ceramics, Chinese Academy of Sciences, Xi'an Xinyao Ceramic Composite Materials Co., Ltd., Shenzhen Yurucheng Dental Materials Co., Ltd., Chaozhou Jinerlu Sanitary Ware Co., Ltd., Zhejiang Meijing New Materials Co., Ltd., and Zhejiang Tianxingjian Water Co., Ltd. The main drafters of this document are. Wan Detian, Xie Song, Li Yueming, Jin Chunxia, Fu Shuai, Bao Yiwang, Luan Qiang, Chen Changzhu, Tian Yuan, Sun Yukang, Fang Lu, Han Zhujie, Zhang Lei, Li Kai, Wang Xingang, Jiang Danyu, Han Xiaochun, Li Jianzhang, Li Haiyan, Li Zongyu, Chen Chao, Xie Zhaowei, Mao Yudi, and Chen Feng. This document was first published in.2009 and this is the first revision. Test method for fracture toughness of fine ceramics Single-edge pre-cracked beam (SEPB) method 1 Scope This document describes a test method for measuring the fracture toughness of fine ceramic materials using the single-edge pre-cracked beam method at room temperature. This document is applicable to the testing of isotropic continuous homogeneous bulk ceramics and various whisker-reinforced and particle-reinforced ceramic matrix composite materials, but Not suitable for testing non-isotropic continuous homogeneous materials. 2 Normative references The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 131 Product Geometrical Specification (GPS) – Representation of surface structure in technical product documentation (GB/T 131-2006, ISO 1302.2002, IDT) GB/T 1182 Geometrical Product Specifications (GPS) Geometric Tolerances – Shape, Orientation, Position and Runout Tolerances (GB/T 1182-2018, ISO 1101.2017, MOD) GB/T 3505 Geometric Product Specification (GPS) - Surface Structure Profilometry - Terms, Definitions and Surface Structure Parameters (GB/T 3505-2009, ISO 4287.1997, IDT) GB/T 4340.1 Metallic materials Vickers hardness test Part 1.Test method (GB/T 4340.1-2024, ISO 6507- 1.2023,MOD) GB/T 5166 Determination of elastic modulus of sintered metal materials and cemented carbides 3 Terms and Definitions The following terms and definitions apply to this document. 3.1 fracture toughness A constant that measures a material's ability to resist crack growth. 3.2 KIpb Fracture toughness values measured using the single-edge pre-cracked beam (SEPB) method. 3.3 precrack Before the test, a straight crack is pre-induced on the specimen. 3.4 precrackfrontline Line indicating the location of the crack tip. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 23806-2025_English be delivered?

Answer: Upon your order, we will start to translate GB/T 23806-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 23806-2025_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 23806-2025_English will be deemed to be sold to your employer/organization who actually pays 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+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 23806-2025?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 23806-2025 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.