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GB/T 37900-2019 English PDF

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US$199.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 37900-2019: Test method of hardness and fracture toughness for ultra-thin glass - Low-load Vickers hardness indentation method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 37900-2019	199	Add to Cart	3 days	Test method of hardness and fracture toughness for ultra-thin glass - Low-load Vickers hardness indentation method	Valid

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Basic data

Standard ID: GB/T 37900-2019 (GB/T37900-2019)
Description (Translated English): Test method of hardness and fracture toughness for ultra-thin glass - Low-load Vickers hardness indentation method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Q30
Classification of International Standard: 81.040.10
Word Count Estimation: 10,151
Date of Issue: 2019-08-30
Date of Implementation: 2020-07-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 37900-2019: Test method of hardness and fracture toughness for ultra-thin glass - Low-load Vickers hardness indentation method

---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.
Test method of hardness and fracture toughness for ultra-thin glass - Low-load vickers hardness indentation method ICS 81.040.10 Q30 National Standards of People's Republic of China Ultra-thin glass hardness and fracture toughness test method Small load Vickers hardness indentation method Published on.2019-08-30 2020-07-01 implementation State market supervision and administration China National Standardization Administration issued

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the China Building Materials Federation. This standard is under the jurisdiction of the National Industrial Glass and Special Glass Standardization Technical Committee (SAC/TC447). This standard was drafted. China Building Materials Inspection and Certification Group Co., Ltd., China Building Materials Science Research Institute Co., Ltd., Jiang Sutie Anchor Glass Co., Ltd., Fuling Qibin Electronic Glass Co., Ltd. The main drafters of this standard. Liu Xiaogen, Bao Yiwang, Wan Detian, Wang Yinmao, Liu Songhua, Qiu Yan, Tu Yi, Tian Yuan, Sun Hekang, Liu Baihui, Pan Ruina, Ma Delong, Wang Yanping, Ai Fuqiang. Ultra-thin glass hardness and fracture toughness test method Small load Vickers hardness indentation method

1 Scope

This standard specifies the hardness and fracture toughness of ultra-thin glass measured by Vickers indentation method with loading force of 1.961N~49.03N. Language and definition, test principle, test equipment, specimens, tests, calculation of results, marking and test reports. This standard is applicable to the hardness test of glass with a thickness of 0.1mm~1.1mm and the breakage of glass with a thickness of 0.3mm~1.1mm. Crack toughness test.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 4340.2 Vickers hardness test for metallic materials - Part 2. Examination and calibration of durometer GB/T 16534 fine ceramics room temperature hardness test method

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Small load Vickers hardness low-loadvickersindentation The load of 1.961N~49.03N is used to press the Vickers indenter into the surface of the sample to form an indentation. The load is divided by the diagonal according to the indentation. The value obtained by calculating the indentation surface area from the line length average. 3.2 Vickers indentation fracture toughness vickersindentationfracturetoughness With a certain load, the diamond Vickers indenter is pressed into the surface of the sample to form an indentation, and pre-cracks are generated at the four vertices of the indentation. The value calculated from the load and the indentation crack propagation length.

4 Test principle

A square tapered diamond indenter with an angle of 136° on the opposite side is pressed into the surface of the specimen at a given test pressure and maintained at the specified After the time, the test force is removed, and the length of the two diagonal lines of the indentation and the length of the diagonal crack propagation of the indentation are measured by a microscope, according to a given meter. Calculate the formula and calculate the hardness and fracture toughness of the sample surface. The schematic diagram of the test principle is shown in Figure 1. The indentation morphology and diagonal and diagonal cracks The schematic diagram of the length measurement is shown in Figure 2. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 37900-2019_English be delivered?

Answer: Upon your order, we will start to translate GB/T 37900-2019_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 37900-2019_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 37900-2019_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.