INTERNATIONAL STANDARD ISO 16338 Second edition 2017-01 Welding for aerospace applications — Resistance spot and seam welding Soudage pour applications aérospatiales — Soudage par résistance par points et la molette Reference number ISO 16338:2017(E) © ISO 2017 ISO 16338:2017(E) COPYRIGHT PROTECTED DOCUMENT © ISO 2017, Published in Switzerland All rights reserved Unless otherwise specified, no part o f this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission Permission can be requested from either ISO at the address below or ISO’s member body in the country o f the requester ISO copyright o ffice Ch de Blandonnet • CP 401 CH-1214 Vernier, Geneva, Switzerland Tel +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org ii © ISO 2017 – All rights reserved ISO 16338:2017(E) Page Contents Foreword v Scope Normative references Terms and definitions Symbols and abbreviated terms Specific engineering requirements Classification o f the joint Production requirements Welding personnel requirements Person responsible for welding procedure qualification and welding machine qualification tests 10 Material groups 11 Preparation of parts to be welded 12 Equipment requirements 13 Welding machines 14 11.1 General 11.2 Cleaning requirements 11.3 Surface coatings 11.4 Assembly 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 13.1 13.2 13.1.1 General 13.1.2 Method o f welding machine qualification Test piece configuration and examination requirements 14.1 Qualification requirements Welding procedure (WPS) 14.2 15 Qualification requirements 14.1.1 General 14.1.2 Determination of weld settings 14.1.3 Methods o f welding procedure qualification 14.1.4 Thickness combination limits 10 14.1.5 Welding procedure specification (WPS) 10 14.1.6 Welding procedure requalification 11 Test piece configuration and examination requirements 11 Quality requirements for production 13 15.1 General 13 15.2 Production witness testing 13 15.2.1 General 13 15.2.2 Witness test specimens 13 15.2.3 Surface resistance 13 15.2.4 Parameter adjustments 13 15.2.5 Production witness test specimen configuration and examination 14 15.2.6 Alternate testing requirements in lieu of production witness testing 16 © ISO 2017 – All rights reserved iii ISO 16338:2017(E) 15.3 Production parts 16 15.3.1 Examination requirements 16 16 f 15.3.3 Tack welds 16 16 D eterio ratio n o welding quality Test pieces 16 16.1 Standard test pieces 16 f 20 6.2 17 Tes t p ieces o r s p ecific p urp o s es Examination, testing and acceptance criteria 20 17.1 General 20 17.2 Visual examination 20 17.2.1 Visible imperfections in test specimens or production parts 20 17.2.2 Sheet separation between welded members 21 17.2.3 Electrode indentation 21 17.3 Radiographic examination 22 17.4 Metallographic examination 24 17.4.1 General 24 17.4.2 Electrode indentation 24 17.4.3 Internal imperfections 25 17.4.4 Nugget penetration 25 17.4.5 Nugget diameter or seam weld width 26 17.5 Mechanical testing 27 17.5.1 Spot welds — Sheet 27 17.5.2 Spot welds — Foil 31 17.5.3 Seam welds — Foil 31 17.5.4 Multiple members test specimen 31 32 33 Annex A (informative) f Annex B (informative) WPS form 36 37 Annex C (informative) f Annex D (informative) 39 42 W e l d i n g p r o c e d M i iv b l i o g r a p h C r a F o B u e c r o q h m m i u n s m a e o e l i f i q r n c u a a l w e t a r t i i l y o f i d o i n c a n n r e t i g m c o p a o n r o c h r d t e c i e n ( s t d e W P r e u p r e q u Q a R ) o q l r u i t a f i o l c i a r f i t i m c a o t i o n r e c o r d ( W P Q R ) — E x a m p l e s n y © ISO 2017 – All rights reserved ISO 16338:2017(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies) The work o f preparing International Standards is normally carried out through ISO technical committees Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters o f electrotechnical standardization The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part In particular the different approval criteria needed for the di fferent types o f ISO documents should be noted This document was dra fted in accordance with the editorial rules of the ISO/IEC Directives, Part (see www.iso.org/directives) Attention is drawn to the possibility that some o f the elements o f this document may be the subject o f patent rights ISO shall not be held responsible for identi fying any or all such patent rights Details o f any patent rights identified during the development o f the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents) Any trade name used in this document is in formation given for the convenience o f users and does not constitute an endorsement For an explanation on the meaning o f ISO specific terms and expressions related to formity assessment, as well as information about ISO’s adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html This document was prepared by ISO/TC 44, Welding and allied processes, Subcommittee SC 14, Welding and brazing in aerospace This second edition cancels and replaces the first edition (ISO 16338:2013), o f which it constitutes a minor revision The main changes compared to the previous edition are as follows: a) notes on different determination of clear annulus zone for radiographic and metallographic examination have been added under the keys o f Figures and 9; b) transposed numbering in column t in Table 14 has been corrected: row changed for 0,60 mm and 0,65 mm; c) 17.5.1.2 Span S is no longer expressed in %; d) to correct a hanging paragraph, a 14.1.3.1 “General” subheading has been introduced; e) other editorial revisions Requests for o fficial interpretations o f any aspect o f this document should be directed to the Secretariat o f ISO/TC 44/SC 14 via your national standards body A complete listing o f these bodies can be found at www.iso.org © ISO 2017 – All rights reserved v INTERNATIONAL STANDARD ISO 16338:2017(E) Welding for aerospace applications — Resistance spot and seam welding Scope T h i s c ument s p e ci fie s re qu i rements for re s i s ta nce s p o t a nd s e a m weld i ng for aero s p ace appl ic ation s T h i s c u ment e s no t apply i f re s i s tance weld i ng i s s i mply an i nterme d iate op eration a nd e s no t a ffe c t the qua l ity o f the end pro duc t, another process for example when tacki ng b a s ic p ar ts prior to a s s embly with Re s i s ta nce weld i ng o f d i s s i m i la r materi a l group combi nation s i s no t covere d b y th i s c u ment S a fe ty and he a lth i s s ue s and concern s are no t covere d by th i s c u ment Normative references T he fol lowi ng c u ments are re ferre d to i n the tex t i n s uch a way th at s ome or a l l o f thei r content s titute s re qu i rements o f th i s c u ment For date d re ference s , on ly the e d ition cite d appl ie s For u ndate d re ference s , the late s t e d ition o f the re ference d c ument (i nclud i ng a ny amend ments) appl ie s ISO 6520-2, Welding and allied processes — Classification of geometric imperfections in metallic materials — Part 2: Welding with pressure ISO 14731, Welding coordination — Tasks and responsibilities ISO 17677-1:2009, Resistance welding — Vocabulary — Part 1: Spot, projection and seam welding ISO/TR 25901-1:2016, Welding and allied processes — Vocabulary — Part 1: General terms ISO/TR 25901-3, Welding and allied processes — Vocabulary — Part 3: Welding processes ISO/TR 25901-4, Welding and allied processes — Vocabulary — Part 4: Arc welding Terms and definitions For the pu r p o s e s o f th i s c u ment, the term s a nd defi n ition s given i n I S O 52 -2 , I S O 147 , I S O 1767 7-1 , I S O/ T R 59 01-1 , I S O/ T R 01-3 , I S O/ T R 01- and the fol lowi ng apply ISO and IEC maintain terminological databases for use in standardization at the following addresses: — IEC Electropedia: available at http://www.electropedia.org/ — ISO Online browsing platform: available at http://www.iso.org/obp 3.1 chisel test de s tr uc tive or non- de s truc tive te s t i n wh ich weld s a re te s te d by applyi ng a pre dom i nantly ten s i le force that re s u lts i n s tre s s e s pri mari ly norma l to the s u r face o f the j oi nt i nter face [S OU RC E : I S O 10 47: 01 , , mo d i fie d — “or non- de s truc tive te s t” h as b e en adde d and the no te to entr y has b e en dele te d ] 3.2 close spaced welds spot welds with weld pitch of less than two diameters © ISO 2017 – All rights reserved ISO 16338:2017(E) 3.3 coring incipient melting melti ng a nd re s ol id i fic ation o f materi a l at the gra i n b ou nda rie s o f the he at a ffe c te d z one and/or i n the weld nugget fe atu re s N o te to entr y: T he s e ap p e a r to b e c racks when e xa m i ne d at low m agn i fic atio n , b ut when e xa m i ne d at h igh m agn i fic ation , a re s e en to b e co mp le tel y fi l le d T h i s o cc u rs pr i m a r i l y i n n ickel a l loys 3.4 d e e n s i g g i n n e a e u r t i h n o g r a i t u y t h o r i t y organ i z ation h avi ng the re s p on s ibi l ity for the s tr uc tu l i ntegrity or ma i ntenance o f r wor th i ne s s o f the hardware and compliance with all relevant documents 3.5 foil joint member with a thickness of 0,20 mm or less 3.6 transverse cut on the diameter of a spot weld or across a seam weld, or a longitudinal cut down the centre of a seam weld m e t a l l o g r a p h i c s e c t i o n 3.7 zone in spot, projection or seam weld where the metal has been melted n u g g e t [S O U RC E : I S O 1767 7-1 : 0 9, 4.10 , mo d i fie d — “S e e Figu re ” 3.8 n u g g e t d i a m e t e fol lowi ng the term s b e en dele te d ] r d ia me ter o f nugge t me as u re d at the 3.9 fayi ng s u r face extent of the nugget or fusion zone into the thickness of a joined member n u g g e t p e n e t r a t i o n 3.10 peel test de s truc ti ve te s t i n wh ich a re s i s tance -welde d lap j oi nt i s te s te d by applyi ng a p e el force wh ich re s u lts i n s tre s s e s mai n ly i n the th ickne s s d i re c tion o f the weld 3.11 pWPS p r e l i m i n a r y w e l d i n g p r o c e d u r e s p e c i f i c a t i o n c u ment contai n i ng the re qui re d vari able s o f the weld i ng pro ce dure wh ich s to b e qua l i fie d [S O U RC E : I S O/ T R 01-1 : 016 , 6] 3.12 p r o d u c t i o n w i t n e s s t e s t s p e c i m e n weld o f te s t s p e c i men made i n pro duc tion s e tup s a nd de s tr uc tively te s te d to provide d ata on the qualities of production welds © ISO 2017 – All rights reserved ISO 16338:2017(E) 3.13 resistance seam welding resistance welding process which produces coalescence at the fayi ng s u r face s by the he at ob ta i ne d from re s i s tance to ele c tric c u rrent th rough the work p ar ts held to ge ther u nder pre s s u re b y ele c tro de s N o te to entr y: T he re s u lti n g weld i s a s er ie s o f overl app i n g re s i s ta nce s p o t weld s m ade p ro gre s s ivel y a lon g a j oi nt b y tu r n i ng whe el ele c tro de s or i nde xi n g the p a r t u nder fi xe d ele c tro de s 3.14 resistance spot welding re s i s tance weld i ng pro ce s s th at pro duce s a weld at the from he at ob tai ne d fayi ng s u r face s b e twe en overlappi ng p ar ts b y the re s i s tance to the flow o f weld i ng c u rrent th rough the workpie ce s that serve to concentrate the welding current and pressure at the weld area from ele c tro de s [S OU RC E : I S O 1767 7-1 : 0 9, 1 ] 3.15 roll spot welding resistance welding process variant that makes intermittent spot welds using one or more rotating circular electrodes N o te to entr y: T he ro tatio n o f the ele c tro de s m ight o r m ight no t b e s top p e d du r i n g the m a ki n g o f a weld [S OU RC E : I S O 1767 7-1 : 0 9, ] 3.16 s e a m w e l d w i d t h width o f the weld me ta l i n the pl ane o f the of the linear seam weld fayi ng s u r face s i n a d i re c tion norma l to the longitud i na l a xi s [S OU RC E : I S O 1767 7-1 : 0 9, 4.14] 3.17 joint member with a thickness of more than 0,20 mm s h e e t 3.18 centre-to-centre distance between adjacent spot welds w e l d p i t c h [S OU RC E : I S O 143 : 01 , 4] 3.19 welding condition provision for the manufacture of a given weld, including materi a l, figuration, materi a l prep a ration, co ol i ng , ele c tro de materia l , ele c tro de ge ome tr y, weld i ng mach i ne numb er, and a l l weld p arame ters that h ave a d i re c t i n fluence on the qua l ity o f the weld 3.20 welding parameter machine setting or adjustment EXAMPLE 3.21 WPS w e l d i n g p Examples are electrode force, welding current, welding speed, welding time r o c e d u r e s p e c i f i c a t i o n c u ment that s b e en qua l i fie d and provide s the re qu i re d variab le s o f the weld i ng pro ce du re to en s ure rep e atabi l ity du ri ng pro duc tion weld i ng [S OU RC E : I S O/ T R 01-1 : 016 , 4] © ISO 2017 – All rights reserved ISO 16338:2017(E) Symbols and abbreviated terms minimum required nugget diameter or seam weld width (see Table 11) lower electrode indentation upper electrode indentation force length of test specimen Ds el eu F l sM ac tua l nugge t d i ame ter or s e a m weld width , a s de term i ne d b y me ta l lo graph ic exam i nation thickness of the thinner sheet thickness of outer member test specimen width/overlap test lot average non-destructive testing t to w Ac NDT pWPS QA SPC statistical process control WPQR WPS prel i m i na r y weld i ng pro ce du re s p e c i fic ation qua l ity as s u nce weld i ng pro ce dure qua l i fic ation re cord weld i ng pro ce dure s p e ci fic ation In S p the e c i f i c e n g i n e e r i n g r e q u i r e event o f a ny fl ic t b e twe en m e the n t s re qui rements o f th i s c ument a nd tho s e re qu i rements s p e c i fie d i n the engi ne eri ng defi n ition, the engi ne eri ng defi nition sha l l ta ke pre ce dence T he clas s i fic ation o f the j oi nt (s e e C l a s s i f i c a t i o n o f t h e j o i Clause n ) sha l l b e de s ignate d on the p ar t s p e ci fic ation or d rawi ng t C la s s i fic ation o f the j oi nt i s b as e d on the fol lowi ng — Class I: a welded joint whose failure under operating conditions causes the loss of the aircraft/spacecraft or one of its main components, or constitutes a direct hazard to people — Class II: a welded joint whose failure causes malfunctions without compromising continued safe fl ight u nti l the end o f the m i s s ion — C las s I I I : a welde d j oi nt who s e aircraft/spacecraft P r o d u c t i o n r e q u i r e m e n fai lu re e s no t a ffe c t the s a fe ty a nd the tra n s p or t fu nc tion o f the t s Prior to production, the following requirements shall be met: a) p ers on nel qua l i fic ation; © ISO 2017 – All rights reserved ISO 63 8: 01 7(E) T a b l e — S h e a r f o r c e r e q u i r A e l m u e m n i t n i s u f o m r a s p n U T t h h i i c n k n n e e r s s s h o e 30 t w e m l t i a m g a l d n t e e < 135 t 135 ≤ Rm S — 90 225 290 355 425 490 540 600 735 865 000 155 225 310 510 755 000 335 645 000 270 490 — — — — avg — 110 290 380 445 535 625 685 755 935 090 270 445 535 645 890 200 515 935 315 660 090 380 — — — — — 135 310 380 445 535 645 705 780 935 135 335 555 665 780 110 535 780 400 870 180 450 670 — — — — h e < 240 a r f o r c s e f t mm 0,25 0,30 0,40 0,45 0,50 0,55 0,60 0,65 0,70 0,80 0,90 1,00 1,10 1,20 1,30 1,40 1,60 1,80 2,00 2,30 2,50 2,80 3,20 3,60 4,10 4,60 4,80 o d h i e u MPa s e avg — 175 400 490 555 665 825 900 980 180 425 670 955 085 225 645 180 600 270 850 225 580 850 — — — — s t r N p e e e t m n r s a g t p l l h e o c y R , i m e w e l d s s — M a t e r i a l g r o u p D — m 240 ≤ R m n s p 225 290 445 510 600 690 780 840 910 045 225 380 645 770 910 290 715 200 805 450 205 960 228 540 10 585 13 345 14 410 o < 386 ≥ 386 t avg 290 380 555 645 755 865 890 020 155 310 535 735 070 230 400 870 400 005 760 560 515 450 050 10 675 13 565 16 680 18 015 265 335 490 555 625 710 825 885 995 155 355 535 800 950 070 470 980 670 560 580 630 915 430 11 230 13 880 16 570 17 950 avg 335 425 625 710 780 890 045 115 200 445 710 935 270 400 600 980 635 605 715 985 295 895 11 785 14 055 17 345 20 730 22 440 © ISO 2017 – All rights reserved ISO 16338:2017(E) P r o d u c t i o n w i t n e s s t e s t s p e c i m e n s The test lot average of the shear forces shall be not less than the applicable value shown in Tables 12 to 14 and no weld shall be less than the applicable minimum value shown in Tables 12 to 14 In addition, for class I, the test lot average shall be not less than 0,9 times of the average of the shear forces achieved i n WP S qua l i fic ation The span between the lowest and highest shear force values from the test specimens shall be less than 35 % of the applicable production test lot average EXAMPLE — 400 N — 100 N — 700 N Measured tensile shear forces: Mean value: a a = 10 200 N = 400 N Span, S; S = 700 N – 100 N = 600 N %S = ( ) 600 N S × 100 = 17 , % () 400 N a 17.5.2 Spot welds — Foil For the pWP S qua l i fic ation te s t s p e ci men, pro duc tion witne s s te s t s p e ci men s and weld i ng mach i ne qua l i fic ation te s t s p e c i men, the fol lowi ng me ch an ic a l criteria apply T he te s t s p e c i men figu ration i s shown in Figure a) Class I and class II: the peel test run shall cause a button (plug) pull-out failure in at least 95 % of f f f fusion at the interface in each case b) Class III: peel tests shall cause a button (plug) pull-out failure in at least 85 % of the welds tested f f ff interface in each case the weld s te s te d T he rema i n i ng % may T he remai n i ng % may l at the i nter ace plane, but there s l l b e evidence o l at the i nter ace pla ne, but there s l l b e evidence o u s ion at the 17.5.3 Seam welds — Foil For the pWP S qua l i fic ation te s t s p e ci men, pro duc tion witne s s te s t s p e ci men s and weld i ng mach i ne qua l i fic ation te s t s p e ci men, the to the weld nugget for more than 95 % of the weld length The remaining portion of the weld length may fai l by frac tu re acro s s the weld i n the fayi ng pl ane, but conti nuou s fu s ion sh a l l b e evident C la s s I I and cl as s I I I : the weld s p e ci men sh a l l b e te s te d i n p e el Fai lu re s l l o cc u r b y te ari ng o f the b) metal adjacent to the weld nugget for more than 85 % of the weld length The remaining portion of f f f f be evident the weld leng th may me ch an ic a l criteri a apply C la s s I : the weld s p e c i men sh a l l b e te s te d i n p e el Fai lu re s l l o cc u r b y te ari ng o f the me ta l adj acent a) fol lowi ng M u l t i p l e m e m b e l b y r s t e s rac tu re acro s s the weld i n the t s p e c i m e ayi ng plane, but conti nuou s u s ion s l l n If more than two members are assembled, the mechanical tests shall be repeated for separate f f f f f for four sheets, and so on; see Figure 12) For peel tests on foils, the same principle applies exa m i nation o e ach a s s embly j oi nt © ISO 2017 – All rights reserved ace (two s erie s o te s ts or a s s embly o th re e s he e ts , th re e s erie s 31 ISO 63 8: 01 7(E) a) Case o f sheets b) Case o f sheets Figure 12 — Tests on assemblies o f more than two sheets — Tensile shear test on each joint face 18 Welding procedure qualification record (WPQR) Documentation o f the qualification tests (see Clause 14), including the welding parameters, shall be contained in a completed WPQR, which should be made available to the quality assurance (QA) personnel For a suggested form, see Annex C The WPQR shall detail the results of examination according to Clause 17 The examination page shall have a formal indication of the success or failure to meet the acceptance criteria applicable to the subject material combination 32 © ISO 2017 – All rights reserved ISO 16338:2017(E) Annex A (informative) M A F o r r e s i s t a n c e a s c p © ISO 2017 – All rights reserved h o t i n e w e l q d i u n a g l i m f i a c c a h i t i n o n t e s t r e p o r t f o r m e 33 ISO 63 8: 01 7(E) 34 © ISO 2017 – All rights reserved ISO 63 8: 01 7(E) A F o r s e a m w e l d i n © ISO 2017 – All rights reserved g m a c h i n e 35 ISO 16338:2017(E) Annex B (informative) WPS form 36 © ISO 2017 – All rights reserved ISO 16338:2017(E) Annex C (informative) F o r m s f o r w e l d © ISO 2017 – All rights reserved i n g p r o c e d u r e q u a l i f i c a t i o n r e c o r d ( W P Q R ) — Examples 37 ISO 63 8: 01 7(E) 38 © ISO 2017 – All rights reserved ISO 16338:2017(E) Annex D (informative) C o m m e n t a r y o n m a c h i n e q u a l i f i c a t i o n D.1 General f 13.1.2.3 The basis 13.1.2.3 f a) total weld combination thickness; b) thinnest contact member (member in contact with the electrode) The production weld combination limits of each material group for a resistance welding machine are T h i s an nex i s i ntende d to clari fy the mach i ne qua l i fic ation re qu i rements s e t for defi ne d b y the s e two D i s de term i ne d b y two the qua l i fic ation l i m its defi ne d b y B a c k g r o u n or th i n ac tors: fac tors d T he i ntent o f the mach i ne qua l i fic ation te s t i s to demon s trate that a p ar tic u la r weld i ng mach i ne s the abi l ity to s i s tently pro duce weld s me e ti ng the re qu i rements a range o f a s s embly th ickne s s e s (s e e Table D.1 for the de s i re d cla s s o f weld s over ) T he qua l i fic ation te s t s er ve s a s a me a n s o f e s tabl i sh i ng the appl ic ation nge o f e ach weld i ng mach i ne G enera l ly, it i s b e s t to s ele c t two memb ers o f e qua l th ickne s s to e s tab l i s h the upp er (th icke s t) and lower (th i n ne s t) qua l i fic ation l i m its th at cover the thickness range of welded assemblies expected in production However, when more than two members are to b e welde d , it may b e ne ce s s ar y to qua l i fy u s i ng mu ltiple memb er as s embl ie s Typic a l ly, th i s s ituation repre s ents the upp er mach i ne qua l i fic ation l i m it D.3 Table of examples See Table D.1 © ISO 2017 – All rights reserved 39 ISO 16338:2017(E) Table D.1 — Table of examples P Example No 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 40 i r o n d q u u c e t s i t o i n o w n e — l d S t c o a c m k b u i n p top to bottom a f t r (0,6 Combined thickness) 0,4 − , (1,4 Combined thickness) 0,4 − ,0 (2,0 Combined thickness) 1,0 − 1,0 (3,0 Combined thickness) 1,0 − ,0 (4,4 Combined thickness) ,2 − ,2 (4,0 Combined thickness) ,0 − 1,0 (1,1 Combined thickness) , − , − , − ,4 (3,6 Combined thickness) 1,0 − 0,2 –0,2 − 0,2 − ,0 (0,4 Combined thickness) 0, − 0,2 (0,6 Combined thickness) 0, − 0, (3,6 Combined thickness) 1,8 − 1,8 (4,5 Combined thickness) 1,2 − 3,3 (2,4 Combined thickness) 1,0 −0, − 0,2 − 1,0 (4,2 Combined thickness) 1,8 − 1,2 − 1,2 (4,7 Combined thickness) , − ,1 (4,8 Combined thickness) , − ,4 − ,4 (0,7 Combined thickness) 0, − 0, (0,9 Combined thickness) 0, − 0,2 − 0,2 (1,0 Combined thickness) 0,5 − 0,5 (1,5 Combined thickness) 0, − 1,0 (3,7 Combined thickness) 1,2 − ,5 (4,6 Combined thickness) ,0 − 0,6 − ,0 (4,7 Combined thickness) , − ,1 (4,3 Combined thickness) 1,8 − ,5 i o o n m I s p r o d u c t i o n Dimensions in millimetres w e l d combination covered by M a c h i n l m a c h i n e q u a l i f i c a t i o n s e o q w u a a l n i d f i c h i a g t i o n s — h ? NO YES YES YES NO YES (0,8 combined thickness) and (4,0 combined thickness) ,4 − ,4 ,0 − ,0 NO YES NO YES NO YES YES YES (0,5 combined thickness) and (4,7 combined thickness) 0,2 − 0, , − ,1 YES NO NO NO YES YES YES NO (1,0 combined thickness) and (4,8 combined thickness) 0, − 0, 1,6 − 1,6 − 1,6 YES NO © ISO 2017 – All rights reserved ISO 16338:2017(E) D.4 Explanation of examples Dimensions are in millimetres EXAMPLE The thinnest production weld contact member (0,2) is thinner than the thinnest contact member rom the low-end machine qualification test (0,4), Also, the total combined thickness o f production weld combination (0,6) is less than that o f the low-end machine qualification test (0,8), f EXAMPLE EXAMPLE EXAMPLE EXAMPLE All requirements of 13.1.2.3 are met All requirements of 13.1.2.3 are met All requirements of 13.1.2.3 are met The thinnest production weld contact member (2,2) is thicker than the thinnest contact member rom the high-end machine qualification test (2,0) Also, the total combined thickness o f production weld combination (4,4) is greater than that o f the high-end machine qualification test (4,0) f EXAMPLE All requirements of 13.1.2.3 are met EXAMPLE The thinnest production weld contact member (0,3) is thinner than the thinnest contact member rom the low-end machine qualification test (0,4) f EXAMPLE All requirements of 13.1.2.3 are met EXAMPLE The total combined thickness of production weld combination (0,4) is less than that of the lowend machine qualification test (0,5) EXAMPLE 10 All requirements of 13.1.2.3 are met EXAMPLE 11 The thinnest production weld contact member (1,8) is thicker than the thinnest contact member rom the high-end machine qualification test (1,6) f EXAMPLE 12 EXAMPLE 13 EXAMPLE 14 EXAMPLE 15 EXAMPLE 16 All requirements of 13.1.2.3 are met All requirements of 13.1.2.3 are met All requirements of 13.1.2.3 are met All requirements of 13.1.2.3 are met Total combined thickness of production weld combination (4,8) is greater than that of the high- end machine qualification test (4,7) EXAMPLE 17 The thinnest production weld contact member (0,2) is thinner than the thinnest contact member rom the low-end machine qualification test (0,5) Also, total combined thickness o f production weld combination (0,7) is less than that o f the low-end machine qualification test (1,0) f EXAMPLE 18 The thinnest production weld contact member (0,2) is thinner than the thinnest contact member rom the low-end machine qualification test (0,5) f EXAMPLE 19 EXAMPLE 20 EXAMPLE 21 EXAMPLE 22 All requirements of 13.1.2.3 are met All requirements of 13.1.2.3 are met All requirements of 13.1.2.3 are met The thinnest production weld contact member (2,0) is thicker than the thinnest contact member rom the high-end machine qualification test (1,6) f EXAMPLE 23 All requirements of 13.1.2.3 are met EXAMPLE 24 The thinnest production weld contact member (1,8) is thicker than the thinnest contact member rom the high-end machine qualification test (1,6) f © ISO 2017 – All rights reserved 41 ISO 63 8: 01 7(E) Bibliography [1] [2] [3] [4] [5] 42 ISO 10447:2015, Resistance welding — Testing ofwelds — Peel and chisel testing ofresistance spot and projection welds ISO 14732, Welding personnel — Qualification testing of welding operators and weld setters for mechanized and automatic welding ofmetallic materials ISO 14373:2015, Resistance welding — Procedure for spot welding of uncoated and coated low carbon steels ISO 15609-5, Specification and qualification of welding procedures for metallic materials — Welding procedure specification — Part 5: Resistance welding IIW IAB-252-11, IIW Guideline Personnel with Responsibility for Welding Coordination: Minimum Requirements for the Education, Examination and Qualification © ISO 2017 – All rights reserved ISO 63 8: 01 7(E) ICS 25.160.01 Price based on 42 pages © ISO 2017 – All rights reserved