ISO 16338:2017
Welding for aerospace applications — Resistance spot and seam welding
ISO 16338:2017 specifies requirements for resistance spot and seam welding for aerospace applications.
ISO 16338:2017 does not apply if resistance welding is simply an intermediate operation and does not affect the quality of the end product, for example when tacking basic parts prior to assembly with another process.
Resistance welding of dissimilar material group combinations is not covered by this document.
Safety and health issues and concerns are not covered by this document.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Specific engineering requirements
6 Classification of the joint
7 Production requirements
8 Welding personnel requirements
9 Person responsible for welding procedure qualification and welding machine qualification tests
10 Material groups
11 Preparation of parts to be welded
11.1 General
11.2 Cleaning requirements
11.3 Surface coatings
11.4 Assembly
12 Equipment requirements
12.1 Welding machines
12.2 Electrodes
12.3 Shear testing machines
12.3.1 General
12.3.2 Stationary shear testing machines
12.3.3 Portable shear testing machines
12.4 Jigs and fixtures
13 Welding machines
13.1 Qualification requirements
13.1.1 General
13.1.2 Method of welding machine qualification
13.2 Test piece configuration and examination requirements
14 Welding procedure (WPS)
14.1 Qualification requirements
14.1.1 General
14.1.2 Determination of weld settings
14.1.3 Methods of welding procedure qualification
14.1.4 Thickness combination limits
14.1.5 Welding procedure specification (WPS)
14.1.6 Welding procedure requalification
14.2 Test piece configuration and examination requirements
15 Quality requirements for production
15.1 General
15.2 Production witness testing
15.2.1 General
15.2.2 Witness test specimens
15.2.3 Surface resistance
15.2.4 Parameter adjustments
15.2.5 Production witness test specimen configuration and examination
15.2.6 Alternate testing requirements in lieu of production witness testing
15.3 Production parts
15.3.1 Examination requirements
15.3.2 Deterioration of welding quality
15.3.3 Tack welds
16 Test pieces
16.1 Standard test pieces
16.2 Test pieces for specific purposes
17 Examination, testing and acceptance criteria
17.1 General
17.2 Visual examination
17.2.1 Visible imperfections in test specimens or production parts
17.2.2 Sheet separation between welded members
17.2.3 Electrode indentation
17.3 Radiographic examination
17.4 Metallographic examination
17.4.1 General
17.4.2 Electrode indentation
17.4.3 Internal imperfections
17.4.4 Nugget penetration
17.4.5 Nugget diameter or seam weld width
17.5 Mechanical testing
17.5.1 Spot welds — Sheet
17.5.2 Spot welds — Foil
17.5.3 Seam welds — Foil
17.5.4 Multiple members test specimen
18 Welding procedure qualification record (WPQR)
Annex A (informative) Machine qualification test report form
Annex B (informative) WPS form
Annex C (informative) Forms for welding procedure qualification record (WPQR) — Examples
Annex D (informative) Commentary on machine qualification
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Specific engineering requirements
6 Classification of the joint
7 Production requirements
8 Welding personnel requirements
9 Person responsible for welding procedure qualification and welding machine qualification tests
10 Material groups
11 Preparation of parts to be welded
11.1 General
11.2 Cleaning requirements
11.3 Surface coatings
11.4 Assembly
12 Equipment requirements
12.1 Welding machines
12.2 Electrodes
12.3 Shear testing machines
12.3.1 General
12.3.2 Stationary shear testing machines
12.3.3 Portable shear testing machines
12.4 Jigs and fixtures
13 Welding machines
13.1 Qualification requirements
13.1.1 General
13.1.2 Method of welding machine qualification
13.2 Test piece configuration and examination requirements
14 Welding procedure (WPS)
14.1 Qualification requirements
14.1.1 General
14.1.2 Determination of weld settings
14.1.3 Methods of welding procedure qualification
14.1.4 Thickness combination limits
14.1.5 Welding procedure specification (WPS)
14.1.6 Welding procedure requalification
14.2 Test piece configuration and examination requirements
15 Quality requirements for production
15.1 General
15.2 Production witness testing
15.2.1 General
15.2.2 Witness test specimens
15.2.3 Surface resistance
15.2.4 Parameter adjustments
15.2.5 Production witness test specimen configuration and examination
15.2.6 Alternate testing requirements in lieu of production witness testing
15.3 Production parts
15.3.1 Examination requirements
15.3.2 Deterioration of welding quality
15.3.3 Tack welds
16 Test pieces
16.1 Standard test pieces
16.2 Test pieces for specific purposes
17 Examination, testing and acceptance criteria
17.1 General
17.2 Visual examination
17.2.1 Visible imperfections in test specimens or production parts
17.2.2 Sheet separation between welded members
17.2.3 Electrode indentation
17.3 Radiographic examination
17.4 Metallographic examination
17.4.1 General
17.4.2 Electrode indentation
17.4.3 Internal imperfections
17.4.4 Nugget penetration
17.4.5 Nugget diameter or seam weld width
17.5 Mechanical testing
17.5.1 Spot welds — Sheet
17.5.2 Spot welds — Foil
17.5.3 Seam welds — Foil
17.5.4 Multiple members test specimen
18 Welding procedure qualification record (WPQR)
Annex A (informative) Machine qualification test report form
Annex B (informative) WPS form
Annex C (informative) Forms for welding procedure qualification record (WPQR) — Examples
Annex D (informative) Commentary on machine qualification
Bibliography