AS 1817-1991

1 - AS 1817-1991 METALLIC MATERIALS - VICKERS HARDNESS TEST
4 - PREFACE
5 - CONTENTS
6 - SECTION 1 SCOPE AND GENERAL
6 - 1.1 SCOPE
6 - 1.2 REFERENCED DOCUMENTS
6 - 1.3 DEFINITIONS
6 - 1.3.1 Arithmetic mean deviation
6 - 1.3.2 Calibration
6 - 1.3.3 Calibrating authority
6 - 1.3.4 Hardness test blocks
6 - 1.3.5 Indenter
6 - 1.3.6 Indenter, reference
6 - 1.3.7 Indenter, standard
6 - 1.3.8 Standard hardness blocks
6 - 1.3.9 Standardizing authority
6 - 1.3.10 Test piece
6 - 1.3.11 Test specimen
6 - 1.4 VICKERS TEST PRINCIPLE
7 - 1.5 DESIGNATION OF VICKERS HARDNESS
7 - 1.6 TABLES OF HARDNESS VALUES
7 - 1.7 HARDNESS CONVERSIONS
8 - SECTION 2 TESTING OF METALS
8 - 2.1 SCOPE OF SECTION
8 - 2.2 TESTING MACHINE
8 - 2.2.1 General
8 - 2.2.2 Installation
8 - 2.2.3 Calibration
8 - 2.2.4 Indenting forces
8 - 2.3 INDENTER
9 - 2.4 MEASURING APPARATUS
9 - 2.4.1 Illumination
9 - 2.4.2 Measuring scale
9 - 2.5 ANVIL
9 - 2.6 PERFORMANCE OF MACHINE
9 - 2.7 MAINTENANCE OF THE TESTING MACHINE BY THE USER
9 - 2.7.1 General
9 - 2.7.2 Inspection of components and operation
9 - 2.7.3 Performance check tests by the user
9 - 2.7.4 Record of user tests
9 - 2.7.5 Assessment of results of user tests
9 - 2.8 TEST PIECE
9 - 2.8.1 Preparation of test piece
9 - 2.8.2 Thickness of test piece
10 - 2.9 TEST PROCEDURE
12 - 2.10 RECORD OF TEST RESULTS
12 - 2.11 TEST REPORT
13 - SECTION 3 COMPLETE CALIBRATION OF THE TESTING MACHINE
13 - 3.1 GENERAL
13 - 3.2 PRELIMINARY INSPECTION
13 - 3.3 INDENTING FORCES
13 - 3.4 INDENTER
13 - 3.4.1 Description
13 - 3.4.2 Load test
13 - 3.4.3 Condition
13 - 3.5 MEASURING APPARATUS
14 - 3.6 PERFORMANCE TEST
14 - 3.7 RECORD OF RESULTS
14 - 3.8 REPORT OF COMPLETE CALIBRATION
15 - SECTION 4 PARTIAL CALIBRATION OF THE TESTING MACHINE
15 - 4.1 GENERAL
15 - 4.2 PRELIMINARY INSPECTION
15 - 4.3 INDENTING PROCEDURE
15 - 4.3.1 General
15 - 4.3.2 Machines employing only one nominal force
15 - 4.3.3 Machines employing more than one force
15 - 4.4 ASSESSMENT OF PERFORMANCE
15 - 4.4.1 Acceptance
16 - 4.4.2 Repeatability
16 - 4.4.3 Error
16 - 4.5 RECORD OF RESULTS
16 - 4.6 REPORT OF PARTIAL CALIBRATION
17 - SECTION 5 CALIBRATION OF STANDARD HARDNESS BLOCKS
17 - 5.1 GENERAL
17 - 5.2 REQUIREMENTS FOR STANDARD HARDNESS BLOCKS
17 - 5.3 CALIBRATION OF STANDARD HARDNESS BLOCKS
17 - 5.3.1 Procedure
17 - 5.3.2 Uniformity of hardness
17 - 5.3.3 Assigned value
18 - 5.3.4 Report
18 - 5.4 STANDARDIZING MACHINE
18 - 5.4.1 General
18 - 5.4.2 Indenting forces
18 - 5.4.3 Reference indenter
18 - 5.4.4 Measuring apparatus
18 - 5.4.5 Application of force
19 - 5.4.6 Measurement of indentation
19 - 5.4.7 Verification of standardizing machine
20 - SECTION 6 REQUIREMENTS FOR STANDARD INDENTERS
20 - 6.1 GENERAL
20 - 6.2 CONDITION
20 - 6.3 DIMENSIONS
21 - APPENDIX A - TABLES OF VICKERS HARDNESS VALUES
21 - A1 SCOPE
21 - A2 APPLICATION
42 - APPENDIX B - TABLES OF CORRECTION FACTORS FOR USE IN TESTS MADE ON SPHERICAL OR CYLINDRICAL SURFACES

Sets out requirements for measuring the Vickers hardness of metals and for the installation, calibration and maintenance of the testing machine. It also specifies requirements for the calibration of standard hardness blocks and indenters. In this edition, the testing and calibration requirements have been combined into one Standard.

This Standard sets out methods for measuring the Vickers hardness of metals and metalproducts using forces between 9.8 N and 980 N inclusive. It does not apply for the use of forces below9.8 N. It includes requirements for the installation and calibration of the testing machine, andrecommendations for its maintenance by the user.This Standard does not apply to portable hardness testing machines.

First published in part as AS B106-1954 (being endorsement of BS 427-1931 with amendments) Second edition AS B106-1957.
Revised and redesignated AS B106.1-1962.
AS B106.2 first published 1965.
AS B106.1-1962 revised and redesignated AS 1817.1-1976.
AS B106.2-1965 revised and redesignated AS 1817.2-1976.
AS 1817.1-1976 and AS 1817.2-1976 revised, amalgamated and redesignated AS 1817-1991.