INTERNATIONAL STANDARD IS0 9443 First edition 1 991 1 1 01 Heat treatable and alloy steels Surface quality classes for hot rolled round bars and wire rods Technical delivery conditions Aciers pour fra[.]
I S0 I N TERN ATI ON AL 9443 STAN DARD Fi rst ed i ti on 991 -1 -01 - H eat-treatabl e qu al i ty wi re an d cl asses rod s - for al l oy steel s h ot-rol l ed Tech n i cal - Su rface rou n d d el i very bars an d d i ti on s Aciers pour fraifemenfs fhermiques et aciers al/i& - Cl asses d e qu a/i f6 de surface des ronds et fils-machine lamin& chaud - Conditions techn i qu es de l i vrai son Referen ce I S0 nu m ber 9443: 991 (E) IS0 9443: 991 (E) Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies) The work of preparing International Standards is normally carried out through IS0 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 IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization Draft International Standards adopted by the technical committees are circulated to the member bodies for voting Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote International Standard IS0 9443 was prepared by Technical Committee ISO/TC 7, Sub-Committee Annex A of this International Standard is for information only Steel, I S0 991 SC 4, Heat treatable and alloy steels All rights reserved No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher International Organization for Standardization Case Postale 56 l CH-1 21 Geneve 20 l Switzerland Prlnted In Switzerland ii INTERNATIONAL IS0 STANDARD H eat-treatabl e h ot-rol l ed an d rou n d al l oy bars steel s an d - wi re Su rface rod s - q u al i ty 9443: 991 (E) cl asses Tech n i cal for del i very d i ti on s Scope cati on , th e d ard s are ed i ti on s ag re e m e n ts l Th i s I n tern ati on al d i ti on s basi s wh i ch of bars th e an d to th e ro d s s u rface wi th spe ci fi es su rface ch aracteri s ti cs wi re h o t- rol l ed Stan d ard appl y g i ven rou n d in secti o n are del i very q u al i ty on th e cl au se 4, fo r o rd e red in th e I S0 By ag reem en t between m an u factu rer an d Wh e n ag reed m ateri al , to at might ti m e may th e fo r to o l steel s Th i s be be appl i ed en q u i ry be an d appl i ed to q u al i ty cl asse s appl i es to th i s col d -d rawn to 6929:1 987, th e I n tern ati on al parti cu l arl y bu t stru ctu ral S tan d ard fo r m ateri al th e d oes perm i ssi bl e S tan d ard stan d ard s excl u d e su rface th e q u al i ty Th ey fo r m ay, by steel s or n ot i n cl u d e d epth stee l appl i cati o n cl asse s m ay al so q u al i ty S tan d ard m ateri al In wh i ch of of co ver th ese stan d ard d evi ate cas e s sh al l fro m th e Defi n i ti on s Fo r th e of su r- 3.1 pu rpo se s bars on e th i s an d or N orm ati ve del i very or s am e type Th e fol l owi n g req u i rem e n ts of th i s I n tern ati on al th i s re q u i rem en ts of S tan d ard producfs - Definitions and provi si on s co n sti tu te th e - Wire - Simple th i s l ot: pro d u ct an d at th e I n tern ati on al S tan d ard , th e appl y U n l ess oth erwi se s tan d ard , th e s am e req u i rem en ts fo r sam e Prod u ct a speci fi ed q u an ti ty d i am ete r of steel o rd e re d th e su rface I S0 6929 in th e of th e wi th th e an d d e- q u al i ty ti m e form s d efi n i ti on s g i ven I mperfecti ons in appl y ti m e an d d efects i m perfecti on s: sm al l e r At materials th e 3 tai n text, Gen eral I n tern ati on al references in - products fo r prevai l stan d ard s re feren ce steel of wh i ch th rou g h Stan d ard s wi re o th er I n tern ati on al th i s of d efi n i ti o n s o rd e r 3 and Metallic Th e su rface I n tern ati on al in- m n tai n test l i vered m ay I S0 requirements Steel 7800:1 984 I S0 torsion sam e Th e an d ap- d ecarbu ri zati o n ro d s I EC of stan d ard s oth er ord er, to appl i cati o n s, appl i ed Steel delivery fol l owi n g req u i rem en ts of th e to S tan d ard possi bi l i ty of stan - classification S tan d ard en g i n eeri n g al so of al so su rface I n tern ati on al stee l s al so cro s s- se cti o n s th e parti cu l ar ag re e m e n t, face of Stan d ard in Th i s an y Stan d ard sh apes I n tern ati on al th e ed i ti on s val i d Al l parti es pu rch aser, I S0 I n tern ati on al cu rren tl y val i d an d I n tern ati on al i n vesti g ate M e m be rs 40 4: 981 , technical sym m etri cal of th i s recen t bel ow reg i sters on to m ost were revi si on , d i ti on N OTE S th i s th e d i cate d to bas e d en co u rag ed pl yi n g i n d i cated s u bj e ct th an m ay or be eq u al l eft D i scon ti n u i ti es to wi th ou t th e wi th speci fi ed a l i m i ti n g d epth val u e repai r wh i ch , pro vi si o n s of pu bl i - 3 th an d efects: th e D i scon ti n u i ti es speci fi ed l i m i ti n g wi th val u e a d epth g re ate r IS0 9443: 991 (E) Sh arp an d shal l ow discontinuities All discontinuities which may act as a notch, for example, laps, seams and cracks sh arp disconti nuities: Discontinuities which have a less notch-like effect and a shallower aspect, such as rolled-in scale and slivers shal l ow discontinuities: Desi gnation Surface quality IS0 9443 - class - za 5,0 Exam pl e for case b) 2): For an agreed surface quality class and a maximum admissible portion zb of defective material of 5,0 % of the total delivery lot found before processing Desi gnati on Req u i rem en ts All products shall have a workmanlike finish (see also clause 7) and shall comply with the requirements specified or agreed in accordance with clause Surface quality IS0 9443 - class - zh 5,0 NOTES Th e Ord eri n g th e bars n u m ber of 2) if the total delivery lot can be checked before processing, the maximum admissible portion zb of defective material in the total delivery lot found before processing (see notes to 5); or 3) if it is not possible to check the total delivery, special agreements are to be made with regard to the maximum admissible portion z of defective material and with regard to its verification for case b) ): For an agreed surface quality class and a maximum admissible portion za of defective material of % of the total delivery lot found during or after further processing exact rel ati vel y Wh en processi n g ti ve cu stom er an d m ay make Th e pl e, 1) wh eth er scrapped it etc n u m ber d efecti ve of of on d el i vered coi l s com pl i an ce ag reed of per d e- total if th at th e porti on of be al so is is n orm al l y al so IS0 of 404 en q u i ry sen t back appl i es an d to i f th e d u ri n g of th an th e an d m ateri al of preferred al read y g reater processi n g d efecti ve ti m e sh al l 1) d el i very (see to expen si ve an d obvi ou s su rface accord i n g b) fu rth er th e Th i s an d of th e u pon u pon , total stop at total zb ti m e exam pl e, materi al ag reed a com pl n t u pon for or th e m eth od is th e h an d l i n g ag reed th e com pl i cated in of per of of becom es m ateri al based , bars req u i rem en ts b) it be za at coi l s i f possi bl e, m eth od porti on u pon l en g th n u m ber veri fi cati on b) th e ag reed total d efecti ve th e th e for be sh ou l d per d el i vered wi th is an d of or q u al i ty 2) sh ou l d ord er n u m ber l i vered Th e cal cu l ati on of d efects Th erefore, Unless the material standard gives exact specifications of this kind, the order shall, as demonstrated in the following examples, cover a) the surface quality class (see table ); and b) one of the following: ) if the original depth of the surface discontinuities can still be determined after the processing of the material, the maximum admissible portion za,of defective material in the total delivery lot found during or after further processing (see notes to 5); or Exam pl e an d l en g th or of materi al en q u i ry th e m eth od d efecti ve d el i very sh ou l d l ot al so for be exam - man u factu rer total th e 4) ord er, th e d efecza, d el i very or is ac cepted Testi n g G eneral The manufacturer takes, under his own responsibility and according to his own judgment, suitable measures to supervise his production in view of the specified surface quality requirements NOTE for th e cl asses th e of rod th e At th e presen t ti n u ou s at high tem peratu res m an u factu rer coi l s for state testi n g can com pl i an ce of of d evel opm en t, th e speci fi c n ot n orm al l y wi th exi st on l y su rface faci l i ti es su rface q u al i ty After rol l i n g , ch eck q u al i ty th e en d s req u i re- men ts The customer is free to check the quality of the delivered material by methods gards as suitable However, disputes shall solved by measuring depths of discontinuities techniques specified in 6.2.3.2 surface he rebe reby the IS0 Test m eth od s torsi on G eneral te sts (se e Methods I S0 9443: 991 (E) 78 0 ) for measu ri ng th e d epth of discontinuities Th e n u i ti es sh al l an d be d u ci bl e m e th o d s u sed fo r m easu ri n g th e d epth su ffi ci en tl y accu rate d etecti n g of an d d i scon ti - d i scon ti n u i ti es sh al l g i ve By - resu l ts m ag n eti c ti on ary N on -d estru cti ve m e th o d s ( se e 2 are an d al so tech n ol og i cal m e th o d s (se e 2 2) - In cases ri ed in acco rd an ce of d i spu te, th e m e asu re m e n ts ou t d el i very fl u x 2 d i ti on wi th sh al l be th e on prod u cts d eci d i n g poten ti al in th e pro be u l trason i c Methods for the d etecti on fol l owi n g u sed fo r 2 m e th od s or th e d etecti on Non-destructi ve oth er su i tabl e on es of vi su al su rface d i rect cu rren t; can on l y d e term i n e th e d epth of Th e exact is d eterm i n ati on to be carri ed of ou t th e ei th er d epth by of fi l i n g a th e d i scon ti n u i ti es meth od s m easu red fl u x m e th o d , i n specti on or fo r pro be exam pl e, d own in to i ts spe ci m en th e rad i al ro o t In or both by exam i n i n g case s th e (se e al so d i recti on a d epth is ta’ bl e , ) Produ cti on i n d u cti ve m e th od s (ed d y tests on tri al batch es m ag n eti c m e th o d s; Wh e n on i n specti on q u al i ty, th e ag re e d u pon arri val processi n g reveal s of a tri al q u esti on abl e batch m ay be cu rren ts) ; is in acce ptabl e o rd e r fo r to th e reveal i n ten d ed wh eth er th e m ateri al appl i cati on In th i s pen etran t case 2 Technol og i cal test te sts m ay th e be take n i n to com pre ssi o n te sts; te sts; th e tri al batrl l r ! , ~ ” he be el i m i n ated ag re e d u pon Repai rs d e fe cts i m perfecti on s u n ti l pre scri be d com pre ssi o n of si d erati on : Local warm si ze meth od s fol l owi n g col d u si n g exam i n ati on ; m ag n eti c d ye m e th o d can fo otn o te parti cl e - sta- approxi m atel y m etal l og raph i c - or of discontinuities d i scon ti n u i ty Th e rotati n g te sts m e th o d s d i scon ti n u i ty - wi th facto r - m e asu re m e n t m e th o d s; d i scon ti n u i ti es - as: pro be s; i n d u cti ve Th ese - su ch car- be m e th o d s ad m i tte d Th e te st an d - ) n on -d estru cti ve re pro - col u m n th e by m ay su rface th e is sm o o th rem oval by wi th i n l evel rem ovi n g th e in l i m i ts tabl e , IS0 9443: 991 (E) Tabl e N om i n al Su rface - Su rface q u al i ty cl ass cl asses l Maxi m u m d i am eter sh arp d i scon ti n u i ti e s mm q ual i ty Q dN Q 25 permi ssi bl e sh al l o w d epth ’ ) of d i scon ti n u i ti e s mm mm 075 0, l o cal repai rs mm 095 25 < dN < 20 0, 02 d, , < dN Q 30 0, 02-dN 0, 02 d, , , 093 073 0, 3O