GB/T 17394.3-2022 English PDF (GBT17394.3-2022)

Delivery: 3 seconds. Download true-PDF + Invoice.
Get QUOTATION in 1-minute: Click GB/T 17394.3-2022
Historical versions: GB/T 17394.3-2022
Preview True-PDF (Reload/Scroll if blank)

GB/T 17394.3-2022: Metallic materials - Leeb hardness test - Part 3: Calibration of reference test blocks
GB/T 17394.3-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 19.060; 77.040.10
CCS N 71
Replacing GB/T 17394.3-2012
Metallic Materials – Leeb Hardness Test – Part 3:
Calibration of Reference Test Blocks
(ISO 16859-3:2015, MOD)
ISSUED ON: JULY 11, 2022
IMPLEMENTED ON: FEBRUARY 01, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
Introduction ... 5
1 Scope ... 6
2 Normative References ... 6
3 Terms and Definitions ... 6
4 Manufacture of Reference Test Blocks ... 7
5 Calibration Machine ... 7
5.1 General ... 7
5.2 Traceability ... 8
5.3 Requirements on calibration machines ... 8
5.4 Calibration of calibration machines ... 8
6 Calibration Method ... 10
7 Number of Test Indentations ... 10
8 Uniformity of Hardness ... 11
9 Marking ... 12
10 Validity ... 13
Annex A (Informative) Examples of reference Test Block ... 14
Annex B (Normative) Requirements for Leeb Hardness Calibration Machines ... 15
Annex C (Informative) Measurement Uncertainty of Hardness Value of Standard Block
... 16
Annex D (Normative) Method for Calibrating Standard Block Using Standard Machine
Based on Non-Leeb Hardness Test Principle ... 20
Annex E (Informative) Conversion Table of Vickers Hardness Value/Brinell Hardness
Value and Leeb Hardness Value Calibrated by the Standard Block ... 26
Bibliography ... 32
Foreword
This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for
Standardization – Part 1: Rules for the Structure and Drafting of Standardizing Documents.
This Document is Part 3 of GB/T 17394 Metallic Materials – Leeb Hardness Test. GB/T 17394
consists of the following parts:
--- Part 1: Test Method;
--- Part 2: Verification and Calibration of Hardness Tester;
--- Part 3: Calibration of Reference Blocks;
--- Part 4: Tables of Hardness Values Conversation.
This Document replaced GB/T 17394.3-2012 Metallic Materials – Leeb Hardness Test – Part
3: Calibration of Reference Blocks. Compared with GB/T 173294.3-2012, the major technical
changes are as follows:
--- Modify the calculation formula and technical indicators of the hardness range and
hardness uniformity of standard Leeb hardness blocks (see 4.2, 8.2 of this Edition; 3.3
and 7.1 of the 2012 Edition);
--- Modify the technical indicators, such as geometric dimensions, flatness, parallelism and
surface roughness of standard Leeb hardness block; and add minimum quality
requirements (see 4.3, 4.5 and 4.6 of this Edition; 3.2, 3.3 and 7.1 of the 2012 Edition);
--- Modify the requirements for the standard machine used to calibrate standard Leeb
hardness blocks (see Clause 5 and Annex B of this Edition; Clause 4 of the 2012 Edition);
--- Modify the requirements for calibration method, number of indentations and validity (see
Clauses 6, 7, and 10 of this Edition; Clauses 5, 6, and 9 of the 2012 Edition);
--- Modify the geometric dimensions and technical requirements of the standard block; and
change it to an informative annex (see Annex A of this Edition; 3.2 of the 2012 Edition);
--- Add the requirements for standard machine performance parameters based on the
principle of Leeb hardness speed measurement (see Annex B of this Edition);
--- Modify the measurement uncertainty of the hardness value of the standard block (see
Annex C of this Edition; Annex A of the 2012 Edition);
--- Add the method of calibrating the standard block using a standard machine based on the
non-Leeb hardness test principle (see Annex D of this Edition).
This Document modifies and adopts ISO 16895-3:2015 Metallic Materials – Leeb Hardness
Test – Part 3: Calibration of Reference Test Blocks.
Compared with ISO 16895-3:2015, this Document has the following technical differences; the
terms to which these differences relate are indicated by a single vertical line (│) in their outer
margins. The specific technical differences and their causes are as follows:
--- Replace ISO16859-1:2015 with GB/T 17394.1 (see Clause 1, 6.1);
--- Replace ISO 16859-2:2015 with GB/T 17394.2-2022 that adopts the revises international
standard (see Clause 1, 5.1);
--- Replace ISO/IEC 17025:2005 with GB/T 27025-2008 that adopts the revises
international standard (see 5.2.1);
--- Replace the example of the standard block listed in Annex C of ISO16859-3:2015 by the
conventional standard block of China (see Annex A);
--- Add Annex D (normative) "Conversion Table between Vickers Hardness Value/Brinell
Hardness Value and Leeb Hardness Value Calibrated by Standard Block".
Please note some contents of this Document may involve patents. The issuing agency of this
Document shall not assume the responsibility to identify these patents.
This Document was proposed by China Machinery Industry Federation.
This Document shall be under the jurisdiction of National Technical Committee on Tester of
Standardization Administration of China (SAC/TC 122).
Drafting organizations of this Document: Quanzhou Fengze Donghai Instrument Hardness
Block Factory; AVIC Changcheng Institute of Metrology and Measurement; Sinotest Equipment
Co., Ltd.; Beijing Times Peak Technology Co., Ltd.; Shenyang TX Testing Instrument Co., Ltd.;
Laizhou Huayin Testing Instrument Co., Ltd.; and Metrology and Measurement Institute of
Hubei Space Academy.
Chief drafting staffs of this Document: Chen Junxin, Shi Wei, Zhang Jinwei, Zhou Cheng,
Zhang Luming, Wang Jingtao, and Huang Yongchang.
The historical editions replaced by this Document are as follows:
--- GB/T 17394.3-2012 was first-time published in 2012;
--- It is the first-time revised.
Metallic Materials – Leeb Hardness Test – Part 3:
Calibration of Reference Test Blocks
1 Scope
This Document specifies a method for the calibration of Leeb hardness standard blocks that are
used for the indirect verification of Leeb hardness testers according to GB/T 17394.2 and for
the periodic checking according to GB/T 17394.1.
This Document is applicable to the calibration of Leeb hardness standard block (hereinafter
referred to as reference block).
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
GB/T 231.3-2012 Metallic materials - Brinell hardness test - Part 3: Calibration of
reference blocks (ISO 6506-3:2005, MOD)
GB/T 4340.3-2012 Metallic Vickers hardness test - Part 3: Calibration of hardness (ISO
6507-3:2005, MOD)
GB/T 17394.1 Metallic materials - Leeb hardness test - Part 1: Test method
GB/T 17394.2-2022 Metallic materials - Leeb hardness test - Part 2: Verification and
calibration of hardness testers (ISO 16859-2:2015, MOD)
GB/T 27025 General requirements for the competence of testing and calibration
laboratories (GB/T 27025-2008, ISO/IEC 17025:2005, IDT)
3 Terms and Definitions
For the purposes of this Document, there are no terms and definitions apply.
5.2 Traceability
5.2.1 Leeb primary hardness standard machines owned by national level institutions are used
to calibrate primary reference test blocks in Leeb hardness for accredited Leeb hardness
calibration laboratories according to GB/T 27025.
5.2.2 The in...