AS 1815-1991

1 - AS 1815-1991 METALLIC MATERIALS - ROCKWELL 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 (Ra )
6 - 1.3.2 Calibration
6 - 1.3.3 Calibrating authority
6 - 1.3.4 Hardness test blocks
6 - 1.3.5 Indenter, reference (diamond cone)
6 - 1.3.6 Indenter, standard (diamond cone)
6 - 1.3.7 Standard hardness blocks
6 - 1.3.8 Standardizing authority
6 - 1.3.9 Test piece
6 - 1.3.10 Test specimen
6 - 1.3.11 Normative
6 - 1.3.12 Informative
7 - 1.4 ROCKWELL TEST PRINCIPLE
7 - 1.5 DESIGNATION OF ROCKWELL HARDNESS
7 - 1.6 HARDNESS CONVERSIONS
9 - SECTION 2 TESTING OF METALS
9 - 2.1 GENERAL
9 - 2.2 TESTING MACHINE
9 - 2.2.1 General
9 - 2.2.2 Installation
9 - 2.2.3 Calibration
9 - 2.3 INDENTERS
9 - 2.4 ANVIL
9 - 2.5 MAINTENANCE OF THE TESTING MACHINE BY THE USER
9 - 2.5.1 General
9 - 2.5.2 Inspection of components and operation
9 - 2.5.3 Performance tests by the user
10 - 2.5.4 Record of user tests
10 - 2.5.5 Assessment of results of user tests
10 - 2.6 TEST PIECE
10 - 2.6.1 Preparation of test piece
10 - 2.6.2 Thickness of test piece
12 - 2.7 TEST PROCEDURE
13 - 2.8 RECORD OF TEST RESULTS
13 - 2.9 TEST REPORT
14 - SECTION 3 COMPLETE CALIBRATION OF THE TESTING MACHINE
14 - 3.1 GENERAL
14 - 3.2 PRELIMINARY INSPECTION
14 - 3.3 CALIBRATION OF APPLIED FORCES
14 - 3.3.1 Calibrating equipment
14 - 3.3.2 Preliminary force (initial setting)
14 - 3.3.3 Preliminary force (after application and removal of the additional force)
15 - 3.3.4 Total force
15 - 3.4 CALIBRATION OF MEASURING APPARATUS
15 - 3.4.1 Scale
15 - 3.4.2 Calibration ranges
15 - 3.4.3 Accuracy
15 - 3.5 VISUAL EXAMINATION OF INDENTERS
15 - 3.5.1 Diamond cone indenter
15 - 3.5.2 Steel ball indenter
15 - 3.6 PERFORMANCE TEST
15 - 3.6.1 Preparation of steel ball indenters prior to performance testing
15 - 3.7 RECORD OF RESULTS
16 - 3.8 REPORT OF COMPLETE CALIBRATION
17 - SECTION 4 PARTIAL CALIBRATION OF THE TESTING MACHINE
17 - 4.1 GENERAL
17 - 4.2 PRELIMINARY INSPECTION
17 - 4.3 INDENTING PROCEDURE
17 - 4.3.1 General
17 - 4.3.2 C Scale
17 - 4.3.3 B Scale
17 - 4.4 ASSESSMENT OF PERFORMANCE
17 - 4.4.1 Acceptance
17 - 4.4.2 Repeatability
18 - 4.4.3 Error
18 - 4.5 RECORD OF RESULTS
18 - 4.6 REPORT OF PARTIAL CALIBRATION
19 - SECTION 5 CALIBRATION OF STANDARD HARDNESS BLOCKS
19 - 5.1 GENERAL
19 - 5.2 REQUIREMENTS FOR STANDARD HARDNESS BLOCKS
19 - 5.3 CALIBRATION OF BLOCKS
19 - 5.3.1 Procedure
19 - 5.3.2 Uniformity of hardness
19 - 5.3.3 Assigned value
19 - 5.3.4 Report
19 - 5.4 STANDARDIZING MACHINE
19 - 5.4.1 General
19 - 5.4.2 Forces
20 - 5.4.3 Reference indenters
20 - 5.4.4 Measuring apparatus
20 - 5.4.5 Application of forces
20 - 5.4.6 Verification of standardizing machine
21 - SECTION 6 CALIBRATION OF STANDARD DIAMOND CONE INDENTERS AND STEEL BALLS
21 - 6.1 GENERAL
21 - 6.2 DIAMOND CONE INDENTER
21 - 6.2.1 Condition
21 - 6.2.2 Dimensions
21 - 6.2.3 Performance
21 - 6.3 STEEL BALL INDENTER
21 - 6.3.1 Sampling for assessment of batch
21 - 6.3.2 Surface condition
21 - 6.3.3 Diameter
21 - 6.3.4 Hardness
22 - APPENDIX A - GUIDE TO SELECTION OF HARDNESS SCALE
23 - APPENDIX B - TESTS ON CURVED SURFACES

Specifies requirements for the measurement of the Rockwell 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 diamond cone and steel ball indenters. In this edition the testing and calibration requirements have been combined into the one Standard.

This Standard sets out methods for measuring the Rockwell hardness of metals and metal products using scales A, B, C, D, E, F, G, H and K. It includes requirements for the installation and calibration of the testing machine, and recommendations for its maintenance by the user.This Standard does not cover the special requirements of the Rockwell superficial hardness test as these are dealt with in AS 2025, nor does it cover the testing of materials other than metals. This Standard does not preclude the use of portable hardness testing machines which meet the appropriate requirements of Section 2.

First published in part as AS B84-1941 (being endorsement of BS 891-1940 without amendment) Revised and redesignated AS B84.1-1967 (being endorsement of BS 891.1-1962 without amendment) Revised and redesignated AS 1815.1-1976.
AS 1815.2 first published 1976.
AS 1815.1-1976 and AS 1815.2-1976 revised, amalgamated and redesignated AS 1815-1991.