AS 1665-1992

1 - AS 1665-1992 WELDING OF ALUMINIUM STRUCTURES
4 - PREFACE
5 - CONTENTS
6 - SECTION 1 SCOPE AND GENERAL
6 - 1.1 SCOPE
6 - 1.2 INNOVATION
6 - 1.3 REFERENCED DOCUMENTS
6 - 1.4 DEFINITIONS
6 - 1.4.1 Fabricator
6 - 1.4.2 Inspecting authority
6 - 1.4.3 Inspector
6 - 1.4.4 Principal
6 - 1.4.5 Shall
6 - 1.4.6 Should
6 - 1.5 WELD CATEGORIES
6 - 1.6 BASIC WELDING REQUIREMENTS
7 - 1.7 SAFETY PRECAUTIONS
7 - 1.7.1 Welding safety
7 - 1.7.2 Welding equipment
8 - SECTION 2 MATERIALS OF CONSTRUCTION
8 - 2.1 PARENT METAL
8 - 2.1.1 General
8 - 2.1.2 Wrought alloys
8 - 2.1.3 Casting alloys
8 - 2.2 SELECTION OF FILLER METALS
8 - 2.3 CARE OF FILLER METALS
8 - 2.4 SHIELDING GASES
10 - SECTION 3 DETAILS OF WELDED CONNECTIONS
10 - 3.1 GENERAL
10 - 3.2 BUTT WELDS
10 - 3.2.1 Size of weld
10 - 3.2.2 Design throat thickness
10 - 3.2.3 Effective length
10 - 3.2.4 Effective area
10 - 3.2.5 Transition of thickness or width
10 - 3.3 FILLET WELDS
10 - 3.3.1 Size of weld
10 - 3.3.2 Weld contour
12 - 3.3.3 Effective length
12 - 3.3.5 Lap joints
12 - 3.3.6 T-joints and corner joints
12 - 3.3.7 Intermittent fillet welds
12 - 3.4 PLUG AND SLOT WELDS
12 - 3.4.1 Plug welds
12 - 3.4.2 Slot welds
15 - SECTION 4 QUALIFICATION OF PROCEDURES AND PERSONNEL
15 - 4.1 QUALIFICATION OF WELDING PROCEDURES
15 - 4.1.1 General
15 - 4.1.2 Method of qualification of welding procedure
15 - 4.1.3 Qualification by tensile, bend, macro, fillet-break and nick-break tests
15 - 4.2 WELDING PROCEDURE TEST PLATES
15 - 4.2.1 General
15 - 4.2.2 Size
15 - 4.2.3 Tack welds
15 - 4.3 CHANGES IN QUALIFIED PROCEDURE
15 - 4.3.1 Changes in procedure requiring requalification
15 - 4.3.2 Changes in procedure not requiring requalification
16 - 4.4 MEASUREMENT OF WELDING VARIABLES
16 - 4.5 WELDING PROCEDURE TEST PIECE AND SPECIMENS
16 - 4.5.1 Butt welds
16 - 4.5.2 Fillet welds
18 - 4.5.3 Preparation of test specimens
18 - 4.6 TESTING
18 - 4.6.1 Nick-break and fillet-break tests
18 - 4.6.2 Macro test
18 - 4.6.3 Tensile test
18 - 4.6.4 Bend test
19 - 4.7 WELDED PRODUCTION TEST PLATES
19 - 4.7.1 General
19 - 4.7.2 Number of test plates
19 - 4.7.3 Test plate material
19 - 4.7.4 Test plate size
19 - 4.7.5 Testing
19 - 4.8 QUALIFICATION OF WELDING PERSONNEL
19 - 4.8.1 General
19 - 4.8.2 Welding supervisor
19 - 4.8.3 Welders
20 - 4.9 RECORD OF QUALIFICATIONS
21 - SECTION 5 WORKMANSHIP
21 - 5.1 METHODS OF PREPARATION AND CLEANNESS
21 - 5.1.1 Arc strikes
21 - 5.1.2 Joint preparation and procedures
21 - 5.1.3 Cleaning
21 - 5.2 PREHEATING
21 - 5.3 CONTROL OF DISTORTION AND SHRINKAGE STRESSES
21 - 5.4 PROTECTION AGAINST WEATHER CONDITIONS
22 - 5.5 ASSEMBLY
22 - 5.5.1 General
22 - 5.5.2 Alignment of butt-welded joints
22 - 5.5.3 Alignment of fillet welds and incompl ete penetration butt welds
23 - SECTION 6 QUALITY OF WELDS
23 - 6.1 QUALITY LEVELS OF WELDED FABRICATIONS
23 - 6.2 REPAIR WELDING
23 - 6.2.1 Procedure for repair welding
23 - 6.2.2 Inspection of repaired welds
25 - SECTION 7 INSPECTION
25 - 7.1 GENERAL
25 - 7.2 QUALIFICATIONS OF INSPECTORS
25 - 7.3 VISUAL INSPECTION OF WORK
25 - 7.3.1 Inspection prior to and during welding
25 - 7.3.2 Inspection after welding
25 - 7.4 NON-DESTRUCTIVE EXAMINATION OTHER THAN VISUAL EXAMINATION
25 - 7.4.1 Extent of non-destructive examination
25 - 7.4.2 Personnel and operator requirements
26 - APPENDIX A - BUTT WELD CATEGORIES
26 - A1 SELECTION OF WELD QUALITY LEVELS
26 - A2 WELD CATEGORY
26 - A3 WELD CATEGORY B
26 - A4 WELD CATEGORY C
27 - APPENDIX B - GUIDANCE ON THE SELECTION OF AND THE EXTENT OF NON-DESTRUCTIVE EXAMINATION
27 - B1 GENERAL
27 - B2 CONSEQUENCES OF FAILURE
27 - B3 MODES OF FAILURE
27 - B4 RECOMMENDED QUALITY PROCEDURES

Sets out the requirements for the fusion welding of aluminium structures and equipment by inert-gas arc welding processes. The Standard provides for three categories of butt welds and one category of fillet weld. Tables of aluminium alloys suitable for welding, details of welded connections, methods of qualification of procedures and personnel, workmanship, weld quality and inspection requirements are included. Appendices are also included as a checklist of matters for discussion and guidance on the selection and extent of non-destructive examination.

This Standard sets out the requirements for the fusion welding of aluminium structures and equipment by inert-gas arc welding processes and is intended principally for use in conjunction with AS 1664. Additionally the Standard may be used for all welded aluminium constructions, other than those constructed in accordance with AS 1200.The Standard applies to the following manual, semi-automatic, and automatic methods of welding:(a) Gas tungsten-arc (GTA).(b) Gas metal-arc (GMA).(c) Pulsed-arc (GTA or GMA). (d) Plasma-arc.The Standard is not intended to apply to the resistance welding, brazing or soldering of aluminium.NOTE: A checklist of matters for discussion between the principal and fabricator is given in Appendix E.

First published as AS 1665-1976.
Second edition 1992.