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JJG 112-2013: Verification Regulation of Metallic Rockwell Hardness Testing Machines (Scales A, B, C, D, E, F, G, H, K, N, T)
Status: Valid JJG 112: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| JJG 112-2013 | English | 529 |
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Verification Regulation of Metallic Rockwell Hardness Testing Machines (Scales A, B, C, D, E, F, G, H, K, N, T)
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JJG 112-2013
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| JJG 112-2003 | English | 719 |
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Verification Regulation of Metallic Rockwell Hardness Testers (Scales A, B, C, D, E, F, G, H, K, N, T)
| Obsolete |
JJG 112-2003
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| JJG 112-1991 | English | 279 |
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(Metal Rockwell hardness test procedures)
| Obsolete |
JJG 112-1991
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| JJG 112-1983 | English | RFQ |
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(Chinese Industry Standard)
| Obsolete |
JJG 112-1983
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PDF similar to JJG 112-2013
Basic data | Standard ID | JJG 112-2013 (JJG112-2013) | | Description (Translated English) | Verification Regulation of Metallic Rockwell Hardness Testing Machines (Scales A, B, C, D, E, F, G, H, K, N, T) | | Sector / Industry | Metrology & Measurement Industry Standard | | Classification of Chinese Standard | A53 | | Classification of International Standard | 17.100 | | Word Count Estimation | 23,257 | | Older Standard (superseded by this standard) | JJG 112-2003 | | Quoted Standard | JJG 144-2007; GB/T 4340.1-2009 | | Regulation (derived from) | AQSIQ Notice No. 154 of 2013 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine | | Summary | This standard applies to: fixed metal Rockwell hardness (A, B, C, D, E, F, G, H, K, N, T Ruler) initial verification, testing and use of follow-up inspection. | JJG 112-2013: Verification Regulation of Metallic Rockwell Hardness Testing Machines (Scales A, B, C, D, E, F, G, H, K, N, T)
---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 Metallic Rockwell Hardness Testing Machines (Scales A, B, C, D, E, F, G, H, K, N, T)
State verification procedures People's Republic of China
Metallic Rockwell hardness tester
(A, B, C, D, E, F, G, H, K, N, T scales)
(ScalesA, B, C, D, E, F, G, H, K, N, T)
Issued on. 2013-10-25
2014-04-25 implementation
The State Administration of Quality Supervision, Inspection and Quarantine released
Metal Rockwell hardness (A, B, C, D, E, F, G,
H, K, N, T scale) test procedures
(ScalesA, B, C, D, E, F, G, H, K, N, T
Replacing JJG 112-2003
Focal point. the National Technical Committee on Metering hardness force value
The main drafting units. China Institute of Metrology
Shanghai Measurement and Testing Technology Research Institute
Guangdong Provincial Institute of Metrology
Participated in the drafting unit. Shanghai Institute of Quality Supervision, Inspection
Laizhou Huayin Test Instrument Co., Ltd.
This procedure hardness values measured force commissioned by the National Technical Committee is responsible for interpretation
The main drafters of this procedure.
Zhang Feng (China Institute of Metrology)
He Li (China Institute of Metrology)
Yu Weiliang (Shanghai Institute of Measurement and Testing)
He Guanglin (Guangdong Institute of Metrology)
Drafters participate.
Shen Qi (Shanghai Quality Supervision, Inspection Technology Research Institute)
Wang Jingtao (Laizhou Huayin Test Instrument Co., Ltd.)
table of Contents
Introduction (Ⅱ)
1 Scope (1)
2. References (1)
3 Overview (1)
4 metering performance requirements (2)
4.1 spindle squareness and concentricity (2)
4.2 Test Force (2)
4.3 indenter (2)
4.4 indentation depth measuring means (3)
4.5 Deformation rack (3)
4.6 shows the value of the maximum permissible error and Repeatability (3)
5 General technical requirements (4)
6 Control of measuring instruments (4)
6.1 Verification condition (4)
6.2 test items and test methods (5)
6.3 test results processing (10)
6.4 test cycle (10)
Appendix A standard Rockwell hardness test (11)
Appendix B Rockwell hardness test recording format (13)
Appendix C Rockwell hardness test certificate within the page format (15)
Appendix D Rockwell hardness test results in the notice page format (16)
Introduction
The regulations drafted in accordance with the rules JJF1002-2010 "national verification procedures write rules" given.
The procedures in place JJG 112-2003 "metal Rockwell hardness (A, B, C, D, E, F, G, H, K,
N, T scales). " Compared with JJG 112-2003, this procedure is mainly technical changes are as follows.
--- Expand the scope of work for the Rockwell hardness and Rockwell hardness standard machine (see Chapter 1);
--- The carbide ball as Rockwell ball indenter of the standard ball (see 4.3.2.1);
--- Remove hardness should "CMC" signs;
--- Remove the test cycle time requirements;
--- Not clearly defined early verification test force must 98.07N or 196.1N dynamometer, just to meet the requirements
The can (see 6.2.4.1);
--- Increase during test indenter ball diameter, should carry out random checks of the same batch of balls provisions (see
6.2.5.2);
--- Feeler increase the maximum permissible error of ± 8μm (see Table 4);
--- Modify the reticle maximum permissible error of ± 3μm (see Table 4);
--- The test project "afterburner speed" to "urging and holding time" (see Table 5);
--- Modify indenter hardness test block with the usual range of hardness block consensus (see Tables 6 and 7);
--- Modify test methods indentation depth measuring device, so that it is not limited to dial-type hardness meter (see
6.2.6.1);
--- Modify the application time (1 ~ 8) s (see 6.2.8.5) the main test force;
--- Increasing the standard Rockwell hardness test machine (see Appendix A);
--- Indentation depth measurement device standard machine is modified to the maximum permissible error ± 0.2μm (see A.3);
--- Diamond cone indenter test cycle from five to four years to modify (see 6.4 and A.9);
--- More than the standard method of Rockwell hardness machine and the reference machine (see A.8);
Test cycle --- standard Rockwell hardness machine modified to four years from five years (see A.9);
--- Increased test records indentation depth measurement device and the indenter and test certificate within the page format (see Appendix B, C).
The procedures in the development process to fully consider the JJG 144-2007 "standard dynamometer test procedures",
GB/T 230.1-2009 "metallic materials Rockwell hardness test - Part 1. Test methods (A, B, C, D,
E, F, G, H, K, N, T scale) ", GB/T 230.2-2002" metallic materials Rockwell hardness test 2
Part I. hardness (A, B, C, D, E, F, G, H, K, N, T scale) test and calibration "
GB/T 230.3-2002 "metallic materials Rockwell hardness test - Part 3. Standard hardness block (A, B, C,
D, E, F, G, H, K, N, T scale) calibration ", GB/T 4340.1-2009" metallic materials - Vickers
Hardness test - Part 1. Test methods ", ISO 6508-1.2005" metallic materials Rockwell hardness test 1
. Test methods ", ISO 6508-2.2005" metallic materials Rockwell hardness test - Part 2. durometer
Verification and calibration ", ISO 6508-3.2005" metallic materials Rockwell hardness test - Part 3. Calibration of reference blocks
Quasi "and the Rockwell hardness of the relevant documents terminology, symbols and definitions, as well as technical requirements, technical indicators and
Testing method.
JJG 112-2003 of previously issued as follows.
--- JJG 112-1984;
--- JJG 112-1991.
Metal Rockwell hardness (A, B, C, D, E, F, G,
H, K, N, T scale) test procedures
1 Scope
The order applies to fixed metal Rockwell hardness (A, B, C, D, E, F, G, H, K, N, T
Ruler) of the initial verification, use and subsequent verification check.
2. References
This procedure references the following documents.
JJG 144-2007 standard dynamometer
GB/T 4340.1-2009 metal materials - Vickers hardness test - Part 1. Test methods
For dated references, only the dated edition applies to this procedure; undated reference documents
Member, the latest edition (including any amendments) applies to this procedure.
3 Overview
Metal Rockwell hardness (hereinafter referred to as hardness) suitable for measuring the hardness of various metal materials. Its original test
Reason is. In the initial test force F0 and total test force F has the role of the diamond cone indenter (or predetermined diameter ball
Indenter) into the surface of the sample, removable main test force F1, measuring the residual indentation depth h retention time of initial test force.
Rockwell and Rockwell hardness scale is calculated in Table 1.
Table 1 Rockwell hardness scale
hardness
Staff
Indenter type
Preliminary test force
F0/N
Main test force
F1/N
Total test force
F/N
Hardness values
The formula
Scope
A diamond cone
B φ1.5875mm ball
C diamond cone
D diamond cone
E φ3.175mm ball
F φ1.5875mm ball
G φ1.5875mm ball
H φ3.175mm ball
K φ3.175mm ball
98.07
490.3 588.4
882.6 980.7
882.6 980.7
882.6 980.7
490.3 588.4
490.3 588.4
100- h0.002
130 h0.002
100- h0.002
130- h0.002
(20 ~ 88) HRA
(20 ~ 100) HRBW
(20 ~ 70) HRC
(40 ~ 77) HRD
(70 ~ 100) HREW
(60 ~ 100) HRFW
(30 ~ 94) HRGW
(80 ~ 100) HRHW
(40 ~ 100) HRKW
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