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GB/T 18449.3-2012 English PDF

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Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 18449.3-2012 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.

US$279.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 18449.3-2012: Metallic materials -- Knoop hardness test -- Part 3: Calibration of reference blocks
Status: Valid

GB/T 18449.3: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 18449.3-2012	279	Add to Cart	3 days	Metallic materials -- Knoop hardness test -- Part 3: Calibration of reference blocks	Valid
GB/T 18449.3-2001	319	Add to Cart	3 days	Metallic Knoop hardness test -- Part 3: Calibration of hardness reference blocks	Obsolete

Similar standards

GB/T 4340.2 GB/T 16825.1 GB/T 17394.3 GB/T 18449.1 GB/T 16826 GB/T 18449.4

Basic data

Standard ID: GB/T 18449.3-2012 (GB/T18449.3-2012)
Description (Translated English): Metallic materials -- Knoop hardness test -- Part 3: Calibration of reference blocks
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: N71
Classification of International Standard: 19.060; 77.040.10
Word Count Estimation: 12,132
Older Standard (superseded by this standard): GB/T 18449.3-2001
Quoted Standard: GB/T 3505-2009, GB/T 13634, GB/T 18449.1-2009, GB/T 18449.2-2009
Adopted Standard: ISO 4545-3-2005, MOD
Regulation (derived from): National Standards Bulletin No. 41 of 2012
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the GB/T 18449. 2-2012 described indirect Knoop hardness test using standard hardness block (hereinafter referred to as the standard block) calibration method. This section applies to a long diagonal length of the indentation is no

GB/T 18449.3-2012: Metallic materials -- Knoop hardness test -- Part 3: Calibration of reference blocks

---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.
ICS19.060; 77.040.10 N71 National Standards of People's Republic of China Replacing GB/T 18449.3-2001 Knoop hardness test of metallic materials Part 3. Calibration of hardness blocks Part 3. Calibrationofreferenceblocks (ISO 4545-3.2005, MOD) Issued on. 2013-06-01 2012-12-31 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 18449 "Knoop hardness test of metallic materials" is divided into four parts. --- Part 1. Test methods; --- Part 2. Verification and calibration of hardness; --- Part 3. Calibration of hardness reference blocks; --- Part 4. Tables of hardness values. This is Part 3 GB/T 18449 in. Rules in this section in accordance with GB/T 1.1-2009 given draft. This Part replaces GB/T 18449.3-2001 "metal Knoop hardness test - Part 3. Calibration standard hardness block," and GB/T 18449.3-2001 compared to the main technical changes are as follows. --- Modify the standard name; --- In Chapter 2 normative references list with GB/T 3505 instead of GB/T 1031-1995 "surface roughness parameters Its value, "adds references GB/T 13634 (see Chapter 2, Section 2 of the 2001 edition); --- Modify the standard hardness block thickness requirements (see 32, 2001, version 3.2.); --- Increased use of standard dynamometer test standard machine test force measurement times (see 4.4); --- Increasing the temperature fluctuations during calibration and effectiveness requirements (see Chapters 5 and 9); --- Modify the hardness uniformity of technical indicators and an increase in the calculation formula relative uniformity standard block (see Chapter 7, 2001 edition Chapter 7); --- Increase the informative Appendix B "measurement uncertainty of the standard block average hardness values" (see Appendix B). This section uses redrafted law revision of international standards ISO 4545-3. "Part 3 of metallic materials Knoop hardness test 2005 Score. standard hardness blocks calibrated "(second edition), in terms of technical content and structure of the text and ISO 4545-3.2005 agreement. This portion of the ISO 4545-3.2005 technical differences and for the following reasons. --- Remove the ISO 4545-3.2005 foreword, preface rewritten; Inside --- on normative references, this part of the technical differences have been adjusted in order to adapt to China's technical conditions, adjustment Yung focus reflected in Chapter 2, "Normative references", the specific adjustments are as follows. ● equivalents adoption of international standards GB/T 3505 instead of ISO 4287 (see 3.6); ● equivalents adoption of international standards GB/T 13634 instead of ISO 376 (see 4.4); ● Modify with international standards of GB/T 18449.1-2009 replaced ISO 4545-1.2005 (see 4.5b), section 5 And Appendix B); ● Modify with international standards of GB/T 18449.2-2012 replaced ISO 4545-2.2005 (see Chapter 1, 4.1 ﹑ attached B.1 B's record); --- It will neither be unrealistic indicators 0.02μm error and can not be modified to a minimum of uncertainty for the resolution 0.05μm (see 4.6); --- International Standard ISO 4545-3.2005 Original symbol uniformity in standard hardness block is "U", easy and symbols Measurement Uncertainty Confusion, this section by the symbol "J" indicates (see 7.1 and Table 1); --- Deleted references. This portion of the ISO 4545-3.2005 compared to the existence of technical differences in terms of these differences it has been involved through its outer margins Vertical single-line position (|) were marked. This section also made the following editorial changes. --- With "this Part" instead of "ISO 4545 present section"; --- With Chinese decimal symbol "." Decimal symbol instead of the English "." Please note that some of the content of this document may involve patent issuing authority of this document does not assume responsibility for the identification of these patents. This part is proposed by China Machinery Industry Federation. This part of the National Technical Committee of Standardization Testing Machine (SAC/TC122) centralized. This section is drafted. Quanzhou Donghai instrument hardness block factory, Changchun Research Institute of Machinery Co., Ltd., Shanghai Measurement and Testing Technology Research Institute, the Haitai Ming Optical Instrument Co., Ltd., Shenzhen City, measuring Detection Technology Co., Ltd. The main drafters of this section. Lisong Mao, Guo Jian, Yu Weiliang, Chen Zhiming, Choi Ma Liang, Zhu Ping. This part of the standard replaces the previous editions are. --- GB/T 18449.3-2001. Knoop hardness test of metallic materials Part 3. Calibration of hardness blocks

1 Scope

This section GB/T 18449 requirements in GB/T 18449.2-2012 described indirect Knoop hardness test standard hardness Block (hereinafter referred to as the standard block) calibration method. This section applies only to the long diagonal length of not less than 0.02mm indentation.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated edition applies to this article Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 3505-2009 Geometrical product specifications (GPS) Surface texture Profile method - Terms, definitions and surface texture parameters (ISO 4287.1997, IDT) GB/T 13634 uniaxial testing machines dynamometer calibration standard (GB/T 13634-2008, ISO 376.2004, Metalic materials-Calibrationofforce-provinginstrumentsusedfortheverificationofuniaxialtestingma- chines, IDT) Test methods. Part 1 GB/T 18449.1-2009 metallic materials Knoop hardness test (ISO 4545-1.2005, MOD) GB/T 18449.2-2009 metallic materials Knoop hardness test - Part 2. Verification and calibration of hardness (ISO 4545-2. 2005, MOD) Manufacturing 3 standard blocks 3.1 Standard block should be devoted to manufacturing. Note. The manufacturing process is required to be of concern, these standard manufacturing processes will block the necessary homogeneity, stability and surface hardness of the organization are Uniformity. 3.2 standard block should be greater than 20 times the thickness of the calibration test force pushed out of the indentation depth. 3.3 standard block should be non-magnetic. Flatness 3.4 standard block surface is 0.005mm. 3.5 standard parallel block is 0.010mm/50mm. 3.6 Standard test surface shall not affect the block indentation scratches; the test surface of the surface roughness parameters Ra of the maximum allowable value 0.1μm; its sampling length L should be 0.80mm (see GB/T 3505-2009 3.1.9). 3.7 To be able to check on the standard block is not removed from any material, its thickness should be marked when calibrated on a standard block, accurate to 0.1mm Or make a differential mark [see 8.1e)] in which the test surface.

4 standard machine

4.1 In addition to the standard Knoop hardness machine should meet the general requirements GB/T 18449.2-2012 provisions, it must also meet the requirements of 4.2 to 4.7. Note. Appendix A gives an example of a method to adjust the lighting system. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 18449.3-2012_English be delivered?

Answer: Upon your order, we will start to translate GB/T 18449.3-2012_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 18449.3-2012_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 18449.3-2012_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 18449.3-2012?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 18449.3-2012 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.