AS 1544.3-1975

1 - AS 1544, Part 3-1975 METHODS FOR IMPACT TESTS ON METALS - CHARPY U-NOTCH AND KEYHOLE NOTCH
4 - PREFACE
5 - CONTENT
6 - FOREWORD
7 - METHOD
7 - 1 SCOPE.
7 - 2 DEFINITIONS.
7 - 3 TESTING MACHINE.
7 - 3.1 General.
7 - 3.2 Installation, Calibration and Maintenance.
8 - 3.3 Test Piece Supports.
9 - 3.4 Striker.
9 - 3.5 Test Piece Clearance.
9 - 3.6 Centre of Percussion.
10 - 3.7 Striking Velocity.
10 - 3.8 Striking Energy.
10 - 3.9 Indicating Equipment.
10 - 3.10 Zero Reading.
10 - 3.11 Friction Losses.
10 - 3.12 Initial Potential Energy.
10 - 3.13 Indicated Absorbed Energy.
11 - 4 TESTPIECE.
11 - 4.1 Sampling and Preparation.
11 - 4.2 Form of Test Piece.
12 - 4.3 Notch Preparation.
13 - 5 TEST PROCEDURE.
13 - 5.1 Conditioning of Test Piece.
14 - 5.2 Location of Test Piece.
14 - 5.3 Operation of the Testing Machine.
15 - 5.4 Record of Test Results.
15 - 6 TEST REPORT.
16 - APPENDIX A - INSTALLATION, CALIBRATION AND MAINTENANCE OF THE TESTING MACHINE
16 - A1 INSTALLATION.
16 - A1.1 Foundation.
16 - A1.2 Level.
16 - A2 CALIBRATION.
16 - A2.1 Calibration on Installation.
16 - A2.2 Routine Recalibration of the Testing Machine.
16 - A2.3 Additional Recalibration of the Testing Machine.
16 - A3 MAINTENANCE OF THE TESTING MACHINE BY THE USER.
16 - A3.1 General.
17 - A3.2 Inspection of Components and Operation.
17 - A3.3 Test Piece Locating Device.
17 - A3.4 Zero Reading.
17 - A3.5 Friction Losses.
20 - APPENDIX B - RECORD OF TEST RESULTS

Specifies conditions for carrying out the tests, and includes nominal dimensions and tolerances for standard and subsidiary test pieces and requirements for the testing machine, its installation, and initial calibration. Guidance on the maintenance of the machine and a method for determining friction losses are included in an appendix.

This standard specifies the conditions for performing the Charpy U-notch impact test on metals with particular reference to ferrous metals. It also includes requirements for the installation of the testing machine, its initial and periodic calibration, and recommendations for its maintenance by the user.NOTE: The term U-notch is taken to include keyhole notch except where requirements specifically differ.

Reconfirmed 1993