AS/NZS 3752:1996

1 - AS/NZS 3752:1996 WELDING-METHODS FOR DETERMINATION OF THE DIFFUSIBLE HYDROGEN CONTENT OF FERRITIC WELD METAL PRODUCED BY ARC
4 - PREFACE
5 - CONTENTS
6 - FOREWORD
7 - SECTION 1 SCOPE AND GENERAL
7 - 1.1 SCOPE
7 - 1.2 APPLICATION
7 - 1.3 REFERENCED DOCUMENTS
8 - 1.4 DEFINITIONS
8 - 1.4.1 Shall
8 - 1.4.2 Should
8 - 1.5 PRINCIPLE
9 - S ECTION 2 APPARATUS
9 - 2.1 GENERAL
9 - 2.2 WELDING JIG
9 - 2.3 EUDIOMETER
9 - 2.3.1 General
12 - 2.3.2 Preparation of Y-tube eudiometer
12 - 2.4 GAS CHROMATOGRAPH HYDROGEN ANALYSER
14 - SECTION 3 PRODUCTION OF WELD SPECIMENS
14 - 3.1 PREPARATION OF TEST PIECE ASSEMBLIES
14 - 3.1.1 General
15 - 3.1.2 Degassing
15 - 3.1.3 Grinding of test specimens and run-on and run-off pieces
15 - 3.1.4 Marking
15 - 3.1.5 Degreasing
15 - 3.1.6 Weighing
15 - 3.2 WELDING
16 - 3.3 RECORDING OF WELDING DATA
16 - 3.4 STORAGE AND SAMPLE PREPARATION
18 - SECTION 4 WELDING PARAMETERS
18 - 4.1 GENERAL
18 - 4.2 MANUAL METAL ARC WELDING (MMAW)
18 - 4.2.1 Electrodes
18 - 4.2.2 Making the test welds
19 - 4.3 SUBMERGED ARC WELDING (SAW)
19 - 4.3.1 Consumables
19 - 4.3.2 Making the test welds
19 - 4.4 GAS METAL ARC WELDING (GMAW) AND FLUX CORED ARC WELDING (FCAW)
19 - 4.4.1 Shielding gas
19 - 4.4.2 Making the test welds
20 - SECTION 5 MEASUREMENT OF DIFFUSIBLE HYDROGEN USING MERCURY DISPLACEMENT PROCEDURE
20 - 5.1 PROCEDURE
22 - 5.2 REPORTING OF ANALYSIS DATA
23 - SECTION 6 MEASUREMENT OF DIFFUSIBLE HYDROGEN USING GAS CHROMATOGRAPHY PROCEDURE
23 - 6.1 PROCEDURE
24 - 6.2 REPORTING OF ANALYSIS DATA
25 - APPENDIX A - RAPID METHODS FOR THE MEASUREMENT OF DIFFUSIBLE HYDROGEN IN FERRITIC ARC WELD METAL
25 - A1 GENERAL
25 - A2 CALIBRATION
26 - A3 LINEARITY
26 - A4 ACCURACY
27 - A5 REPRODUCIBILITY
27 - A6 BLANK
28 - APPENDIX B - WELDING DATA RECORD (see Note)
29 - APPENDIX C - SAFETY PRECAUTIONS IN HANDLING MERCURY
30 - APPENDIX D - HYDROGEN ANALYSIS DATA (see Note)

Sets out procedures for the measurement of diffusible hydrogen of ferritic weld metal produced by different arc welding processes. Two alternative methods of measurement are specified, viz. the collection-over-mercury procedure, and a gas chromatography procedure.

This Standard sets out the sampling and analytical procedures for the determination of diffusible hydrogen in weld metal arising from the welding of ferritic steel using arc welding processes with consumable electrodes.This Standard describes the primary method of hydrogen determination using the method of collection over mercury. An alternative method of determination using gas chromatography is also given.NOTES:1 Other methods may be used provided that a proper correlation, in terms of accuracy and reproducibility with room temperature diffusible hydrogen results obtained using the primary method, is established (see Appendix A).2 The Standard specifically covers manual metal arc, gas metal arc, flux cored arc and submerged arc welding processes. Extension of the methods to other arc welding processes such as gas tungsten arc or plasma arc welding is possible; however, details should be agreed between the parties concerned.

First published in Australia as AS 3752-1990.
Jointly revised and designated AS/NZS 3752:1996.