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JJG 1048-2009 English PDF

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JJG 1048-2009: Verification Regulation of Knoop Hardness Reference Blocks
Status: Valid

JJG 1048: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
JJG 1048-2009English309 Add to Cart 3 days [Need to translate] Verification Regulation of Knoop Hardness Reference Blocks Valid JJG 1048-2009
JJG 1048-1995EnglishRFQ ASK 3 days [Need to translate] Calibration Specification of Data Acquisition System Obsolete JJG 1048-1995

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Basic data

Standard ID JJG 1048-2009 (JJG1048-2009)
Description (Translated English) Verification Regulation of Knoop Hardness Reference Blocks
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A53
Classification of International Standard 17.100
Word Count Estimation 13,190
Date of Issue 2009-08-18
Date of Implementation 2009-11-18
Quoted Standard ISO 4545-1-2005; ISO 4545-2-2005; ISO 4545-3-2005; JJG 144-2007
Regulation (derived from) AQSIQ Announcement No. 78 of 2009
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine
Summary This standard applies to test force range 0. 09807N to 19. 614N standard Knoop hardness test block for the first time, follow-up testing and use test. Knoop hardness standard block indentation diagonal length should be greater than or equal to 0. 020MM.

JJG 1048-2009: Verification Regulation of Knoop Hardness 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.
Verification Regulation of Knoop Hardness Reference Blocks State verification procedures People's Republic of China Knoop hardness standard block Posted 2009-08-18 2009-11-18 implementation The State Administration of Quality Supervision, Inspection and Quarantine released Knoop hardness standard block test procedures The regulations by the State Administration of Quality Supervision, Inspection and Quarantine approved on August 18, 2009, and from From November 18, 2009 into effect. NFP. National strength, hardness measurement technology committee Main drafting unit. Shanghai Institute of Measurement and Testing China Institute of Metrology Participated in the drafting unit. Quanzhou Fortress hardness of the East China Sea block plant equipment This procedure entrust national force, hardness measurement technical committee responsible for the interpretation The main drafters of this procedure. Yu Weiliang (Shanghai Institute of Measurement and Testing) He Li (China Institute of Metrology) Drafters participate. Liu Lianqiu (China Institute of Metrology) Chen Zhiming (Quanzhou Fortress hardness of the East China Sea block plant equipment)

table of Contents

1 Scope (1) 2. Referenced Documents (1) 3 Overview (1) 4 metering performance requirements (2) Hardness and evenness of 4.1 standard blocks (2) Stability 4.2 standard blocks (3) 5 General technical requirements (3) 5.1 standard block geometry (3) 5.2 Other requirements of the standard blocks (3) 6 Control of measuring instruments (3) 6.1 Verification condition (3) 6.2 test items and test methods (4) 6.3 Verification Results Processing (5) 6.4 test cycle (5) Appendix A shows the value of test recording format (6) Appendix B test certificate page format (7) Appendix C test results in the notice page format (8) Knoop hardness standard block test procedures

1 Scope

The order applies to the test force range for the first time to test 0.09807N 19.614N standard Knoop hardness block Subsequent verification and in-service inspection. Indentation diagonal length standard Knoop hardness of greater than or equal to the block 0.020mm.

2 Citations

The regulations cited in the following documents ISO 4545. 1-2005 Metalicmaterials-Knoophardnesstest-Part 1. Testmethod (. Test methods for metallic materials Knoop hardness test - Part 1) ISO 4545. 2-2005 Metalicmaterials-Knoophardnesstest-Part 2. Verification andcalibrationoftestingmachine (Metal materials Knoop hardness test - Part 2. Verification and calibration of hardness) ISO 4545. 3-2005 Metalicmaterials-Knoophardnesstest-Part 3. Calibration ofreferenceblocks (Metal materials Knoop hardness test - Part 3. Calibration of hardness blocks) JJG 144-2007 standard dynamometer test procedures Should pay attention to the use of this procedure by using the currently valid version of the documents cited.

3 Overview

Knoop hardness standard blocks (hereinafter referred to as hardness block) is a measure of the standard for Knoop hardness tester indication accredited appliance. Knoop hardness test principle. the angle α between the top two ribs and β 172.5 ° angle of 130 ° diamond pyramid Indenter using a predetermined test force into the surface of the sample, after a certain period of holding removable test force (see Figure 1). test Suppliers force divided by the surface area of the specimen is projected indentation Knoop hardness. Long diagonal measurement of the indentation in the actual operation Degrees, according to the formula (1) to calculate the Knoop hardness values. HK = 0.102 = 0.102 cd2 ≈1.451 d2 (1) Where. HK --- Knoop hardness symbol; F --- test force, N; S --- indentation projected area, mm2; d --- long indentation diagonal length, mm; c --- indenter constant = tanβ 2tan With the projected area of the indentation with a long diagonal length about the square calculation.

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