इंटरनेट मानक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. “जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ” Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru “The Right to Information, The Right to Live” “Step Out From the Old to the New” IS 13360-5-13 (1992): Plastics - Methods of Testing, Part 5: Mechanical Properties, Section 13: Determination of Rockwell Hardness [PCD 12: Plastics] “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda ““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee”” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS 13360 ( Part 5/Set 13 ) : 1992 lndian Standard PLASTICS - METHODS OF TESTING PART 5 MECHANICAL PROPERTIES Section 13 Determination of Rockwell Hardness UDC 678*5/*8: 620-178-152-42 @ BIS 1992 BUREAU OF INDIAN STANDARDS MANAK BHAvAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 October 1992 Price Gromp 3 sdohteM fo stseT rof scitsalP lanoitceS ,eettimmoC PCD 23 FOREWORD sihT naidnI dradnatS was detpoda yb eht uaeruB fo naidnI Standards, retfa eht tfard dezilanif yb eht sdohteM fo tseT rof scitsalP lanoitceS eettimmoC had neeb devorppa yb eht ,muelorteP laoC and detaleR stcudorP noisiviD .licnuoC llewkcoR hardness rebmun is yltcerid detaler ot eht noitatnedni hardness fo a citsalp ;lairetam eht rehgih eht llewkcoR hardness ,rebmun eht redrah eht .lairetam roF slairetam gnivah hgih peerc and ,yrevocer eht emit srotcaf devlovni ni noitacilppa fo eht rojam and ronim sdaol evah a elbaredisnoc tceffe no eht stluser fo eht .stnemerusaem euD ot a trohs palrevo fo llewkcoR hardness ,selacs owt tnereffid llewkcoR hardness srebmun fo tnereffid selacs yam eb deniatbo no eht emas ,lairetam htob fo hcihw yam eb yllacinhcet .tcerroc An evitanretla dohtem fo using llewkcoR ssendraH retseT ot evig hadnness no eht llewkcoR VT hardness elacs is nevig ni eht xennA A hcihw shows woh this elacs yam eb detaler ot ball noitatnedni hardness fo plastics denimreted ni ecnadrocca htiw SI 13360 traP( teS/S 12 ) : 1992. ehT dohtem has neeb dengila htiw 0SI 2-9302 : 1987 scitsalP‘ - noitanimreteD fo hardness traP- 2 : llewkcoR ’ssendrah issued yb eht lanoitanretnI noitazinagrO rof noitazidradnatS ( 0SI .) nI gnitroper eht stluser fo a tset edam ni ecnadrocca htiw this standard, fi eht lanif ,eulav devresbo ro ,detaluclac is ot eb dednuor ,ffo ti shall eb enod ni ecnadrocca htiw SI 2 : 1960 seluR‘ rof gnidnuor ffo laciremun seulav ( ehT rebmun fo tnacifingis secalp deniater revised )‘. ni eht dednuor ffo eulav dluohs eb eht emas as that fo eht deificeps eulav ni this standard. IS 13360 ( Part S/Set 13 ) : 1992 Indian Standard PLASTICS - METHODS OF TESTING PART 5 MECHANICAL PROPERTIES Section !I 3 Determination of Rockwell Hardness noitartenep gnitluser morf eht ronim .daol ehT 1 SCOPE llewkcoR hardness rebmun is devired morf eht sihT standard sebircsed a dohtem rof -reted ten esaercni ni htped fo noisserpmi as eht daol gninim eht noitatnedni hardness fo plastics yb no an rotnedni is desaercni morf a dexif ronim snaem fo eht llewkcoR hardness retset using daol ot a rojam daol and neht denruter ot eht eht llewkcor ,’M‘ ’L‘ and ’R‘ hardness .selacs emas ronim .daol 4.2 hcaE llewkcoR hardness elacs noisivid 2 SECNEREFER stneserper 0.002 mm lacitrev tnemevom fo eht .rotnedni nI ,ecitcarp eht llewkcoR hardness ehT gniwollof naidnI Standards era yrassecen rebmun is devired morf eht gniwollof -noitaler stcnujda ot this standard: ship: IS No. Title HR = 130 - e 196 : 1 669 cirehpsomtA snoitidnoc rof erehw gnitset ( revised ) HR = eht llewkcoR hardness ,rebmun and 2828 : 964 yrassoIG fo smret desu ni eht e = eht htped fo noisserpmi retfa lavomer plastics yrtsudni fo eht rojam ,daol ni units fo 0.002 .mm 13360 scitsalP - sdohteM fo :gnitset ( traP 1 ) : 1992 traP 1 noitcudortnI NOTE sihT- pihsnoitaler ylno sdloh rof eht ,M L dna R .selacs 13360 scitsalP - sdohteM fo :gnitset traP( teS/5 )21 : traP 5 lacinahceM ,seitreporp 5 1992 teS 12 noitanimreteD fo ball APPARATUS noitatnedni hardness fo ehT apparatus is a standard llewkcoR 5.1 plastics hardness retset hcihw sesirpmoc :yllaitnesse 13360 scitsalP - sdohteM fo :gnitset a> a gnitroppus an elbatsujda &%I\ teS/S )7 : traP 5 lacinahceM ,seitreporp rigid frame mroftalp dettif htiw a etalp at tsael 50 teS 7 noitanimreteD fo -nedni mm ni retemaid ot troppus eht tset noitat hardness fo plastics yb ;nemiceps snaem fo a retemorud ( erohS hardness ) b) an indentor htiw its detaicossa ;sgnittif c) a rof gniyIppa eht etairporppa device 3 TERMINOLOGY sdaol ot eht rotnedni tuohtiw .tcapmi 3.1 roF eht esoprup fo this standard, eht -ifed 5.2 ehT rotnedni sesirpmoc a dehsilop -drah snoitin nevig ni SI 2828 : 1964 shall .ylppa dene leets ball hcihw sllor yleerf ni its .gnisuoh ehT ball shall ton mrofed gnirud eht tset ro 4 ELPICNIRP wohs egamad retfa a .tset ehT retemaid fo eht rotnedni sdneped nopu eht llewkcoR elacs 4.1 sihT is a dohtem rof gninimreted hardness ni esu ( ees 5.5 .) ni hcihw a tnatsnoc ronim daol is deilppa ot a leets ball gnitser no eht lairetam ot eb 5.3 ehT rotnedni is deppiuqe htiw a dial eguag ,detset dewollof yb noitacilppa fo a rojam ro rehto elbatius ecived ot erusaem eht htped ,daol and neht dewolIof yb a nruter ot eht fo noitartenep fo eht rotnedni nihtiw 0.001 emas ronim ,daol all at deificeps stimil rof .mm tI is elbarised tub ton laitnesse rof eht semit fo .gnidaol ehT lautca tnemerusaem is dial eguag ot eb detarbilac ni llewkcoR -drah desab no eht latot htped fo ,noitartenep minus ness srebmun ( eno llewkcoR elacs noisivid eht citsale yrevocer retfa a dexif emit -wollof = 0.002 .)mm nehW eht enihcam is os yltcerid gni lavomer fo eht rojam ,daol minus eht ,detarbilac ti is yllausu rof eht dial eguag ot 1 IS 13360 ( Part S/Set 13 ) : 1992 evah a kcalb and a der ,elacs eht retal gniwolla slatem ) fo nwonk llewkcoR hardness, using yllacitamotua rof eht tnatsnoc fo 130 ni eht eht llewkcoR E .elacs nI this yaw yna stluaf noitavired fo llewkcoR hardness rebmun no eud ot gninoitcnuflam fo eht daol noitacilppa eht M, L and R selacs ( ees 4.2 .) evitanretlA ecived ro emarf noitamrofed lliw eb ;devresbo snaem fo tnemerusaem fo noitartenep and eseht stluaf shall eb detcerroc erofeb .esu yalpsid fo data yam eb ,desu dedivorp that yrallicnA skcehc yam eb edam at tneuqerf eht ycarucca is at tsael lauqe ot that fo eht slavretni using skcolb detarbilac rof esu nehw dial .eguag eht enihcam is tes up ni eht R, L ro M tset .sedom 5.4 ehT etairporppa sdaol rof eht M, L and R selacs era as nevig ni 5.5. nI hcae esac eht 6 TEST SPECIMEN ronim daol is 98.07 N. noisivorP is yllausu 6.1 ehT standard tset nemiceps shall eb a talf edam ni eht llewkcoR enihcam ot ylppa eht teehs at. tsael 6 mm .kciht tI shall eb fo a ronim daol ot eht nemiceps yb snaem fo a elbatius aera ot teem eht stnemeriuqer fo 8.4. wercs capstan hcihw sesiar eht mroftalp ehT tset nemiceps seod ton ylirassecen evah gnitroppus eht tset nemiceps litnu eht rettal ot eb .erauqs tI shall ton wohs yna ecnedive stcatnoc eht .rotnedni nI eseht secnatsmucric fo tnirpmi yb eht rotnedni no eht detroppus eht dial eguag has an detacidni tniop ot wohs ecafrus retfa a .tset nehw eht ronim daol has neeb ylluf ;deilppa ecnerefer dluohs eb edam ot eht s’rerutcafunam 6.2 nehW snemiceps fo eht muminim ssenkciht koobdnah erofeb gnitarepo eht .enihcam ehT deificeps ni 6.1 era ton ,elbaliava eht tset tnemtsujda fo deeps fo daol noitacilppa is fo nemiceps shall eb edam up fo a elip fo renniht taerg .ecnatropmi Adjust eht top-hsad no eht tset snemiceps fo eht emas ssenkciht and eht llewkcoR retset os that eht gnitarepo eldnah emas ,lairetam dedivorp that eht secafrus fo setelpmoc its levart ni 4 ot 5 s htiw on -iceps eht laudividni seceip era ni latot tcatnoc and nem no eht enihcam ro on daol deilppa yb ton dleh apart yb yna mrof fo ecafrus -repmi eht rotnedni ot eht .livna ehT rojam daol shall snoitcef rof ,elpmaxe sink marks ro srrub morf eb 980.7 N rof this .noitarbilac saw stuc .) 5.5 ehT rojam and ronim sdaol and rotnedni 6.3 llA snoitatnedni shall eb edam no eno sretemaid rof eht llewkcoR selacs era as ecafrus ylno fo eht tset .nemiceps :swollof 6.4 enO tset nemiceps is tneiciffus rof eht noitanimreted fo llewkcoR hardness and at Rockwell Minor Major Inden tor tsael evif stnemerusaem shall eb edam no hcae Hardness Load Load Diameter mm tset nemiceps fo ciportosi .slairetam Scale N N R 98.07 588.4 12.7 f 0.015 6.5 fI eht lairetam rednu tset is ,ciportosina eht noitcerid fo noitatnedni shall eb deificeps L 98.07 588.4 6.35 f O-015 ni noitaler ot eht sexa fo .yportosina fI M 98.07 980 .7 6.35 f 0.015 stluser ni erom than eno noitcerid era ,deriuqer E 98.07 980.7 3.175 f 0.015 tset snemiceps shall eb deraperp os that at tsael evif llewkcoR hardness stnemerusaem yam eb denimreted ni hcae .noitcerid htoB eht rojam and ronim sdaol shall eb etarucca nihtiw 2 .tnecrep 7 CONDITIONING NOTE- ehT elacs R si desu rof noitarbilac rof eht esoprup fo siht .dradnats 7.1 ehT tset snemiceps shall eb denoitidnoc erofeb gnitset ni eht erehpsomta deificeps ni ehT enihcam dluohs eb detnuom no a ,level eht etairporppa naidnI dradnatS gnitaler ot eht 5.6 digir esab eerf morf .noitarbriv fI eht enihcam lairetam rednu tset ro ni eno fo esoht deificeps gnitnuom is ylbadiovanu detcejbus ot -arbiv ni SI 196 : 1966 ro SI 13360 ( traP 1 ) : 1992. noit ( rof ,elpmaxe ni eht ytiniciv fo rehto tset senihcam ,) eht llewkcoR retset yam eb -nuom 8 PROCEDURE det no a latem etalp htiw gnops rebbur at tsael 25 mm ,kciht ro nopu yna rehto -tnuom 8.1 Unless esiwrehto ,deificeps gnitset shall eb demrofrep ni eht emas standard erehpsomta ings hcihw ylevitceffe damp eht .noitarbiv as desu rof gninoitidnoc eht tset .nemiceps ehT gnitset apparatus is detarbilac -idoirep 8.2 kcehC that eht rojam and ronim sdaol and 5.7 yllat using a tset kcolb fo latem ( tsac ,nori eht rotnedni retemaid era tcerroc rof eht -kcoR muinimula and muisengam ,syolla gniraeb llew hardness elacs ni esu ( ees 5.5 .) dracsiD 2 SI 13360 ( Part S/See 13 ) : 1992 eht tsrif gnidaer retfa gnignahc a ball adjust- 9 EXPRESSION OF RESULTS ,tnem as eht rotnedni seod ton ylreporp taes yb tnemtsujda-dnah ni eht gnisuoh .kcuhc ehT lluf 9.1 sserpxE eht llewkcoR hardness as a rebmun erusserp fo eht rojam sdaol is deriuqer ot taes dexiferp yb eht elacs .rettel eht rotnedni redluohs otni eht .kcuhc 9.2 fI eht llewkcoR hardness retset is yltcerid NOTE - ehT cidoirep noitarbilac fo eht sutarappa detarbilac ni hardness ,srebmun drocer eht llahs eb sa rep 5.7. llewkcoR hardness retfa hcae tset ( ees 8.3 ecalP eht tset nemiceps no eht .mroftalp etoN 8.3 .) kcehC that eht ecafrus fo eht tset nemiceps and that fo eht rotnedni era eerf fo dust, ,trid 9.3 fI ,yrassecen etaluclac eht llewkcoR -drah esaerg and elacs and that eht tset nemiceps ness rebmun ( ees 4.2 .) ecafrus is lamron ot eht noitcerid fo eht deilppa .daol 9.4 nehW ,deriuqer etaluclac eht detamitse standard noitaivid as :swollof ylppA eht ronim daol and tes eht dial eguag ot .orez nihtiW 10 s fo gniylppa eht ronim ,daol ylppa eht rojam daol ( ees 5.4 .) evomeR eht =c I, 2x51 - nz? rojam daol 15 + 1 s retfa eht start fo gniylppa % n- 1 eht rojam .daol gniruD this ,noitarepo diova erehw gnikrej eht enihcam .msinahcem daeR eht c = standard noitaived ( detamitse ,) dial eguag ot eht tseraen elacs noisivid 15 s retfa eht start fo gnivomer eht rojam .daol x = laudividni eulav fo llewkcoR hardness, Z = eht citamhtira naem fo eht ,stluser NOTE - fI eht enihcam si yltcerid detarbilac ni llewkcoR ssendrah ,srebmun ti si tneinevnoc ot 12 = rebmun fo .stluser deecorp .sa swollof : tnuoC eht rebmun fo semit eht eldeen sessap hguorht orez no eht der elacs retfa noitacilppa fo 10 TEST REPORT eht roiam .daol tcartbuS siht morf eht rebmun fo semit eh{ eldeen sessap hguorht orez nopu eht The tset troper shall edulcni eht gniwollof lavomer fo eht rojam .daol fI siht ecnereffid si :sralucitrap ,orez drocer eht ssendrah rebmun sa eht gnidaer ulus 100. fI eht ecnereffid si 1. drocer eht gnidaer a) ecnerefeR ot this standard; sa eht elacs gnidaer ’tuohtiw egnahc ,dna fi eht ecnereffid si 2, drocer eht gnidaer sa eht elacs b) etelpmoC noitacifitnedi fo eht lairetam gnidaer sunim 100, fI ni ,tbuod tlusnoc eht -unam ;detset s’rerutcaf koobdnah rof eht .enihcam 8.4 ekaM evif stnemerusaem no eht emas -rus lC ,noitpircseD snoisnemid and rennam fo ecaf fo eht tset .nemiceps oN tnemerusaem noitaraperp fo eht tset ;nemiceps shall eb edam nihtiw OI mm fo yna egde fo eht 4 gninoitidnoC and snoitidnoc rednu hcihw tset ,nemiceps and on owt stnemerusaem shall eht tset is deirrac ;tuo eb edam less than 10 mm apart. e) rebmuN fo ;stset 8.5 ,yllaedI llewkcoR hardness srebmun dluohs eil neewteb 50 and ;511 seulav evoba this egnar f) llewkcoR hardness elacs ( ,’M‘ L‘ era etaruccani and eht noitanimreted shall eb ro ’R‘ ;) detaeper using eht txen tsereves .elacs >g llewkcoR hardness ,srebmun laudividni seulav and egareva ;eulav and NOTE - fI a ssel ereves elacs naht eht R elacs si ,deriuqer eht llewkcoR tset si ton elbatius dna eht h) detamitsE standard noitaived fo eht lairetam dluohs eb detset ni ecnadrocca htiw SI 13360 ( traP teS/S 7 ) : 1992. ,stluser fi .deriuqer IS 13360 ( Part S/Set 13 ) : 1992 XENNA A ( Foreword ) DETERMINATION OF ROCKWELL -a HARDNESS A-O PRINCIPLE A-l.3 ecalpeR eht reppoc kcolb yb eht stset nemiceps and deecorp as ni 7.3 tpecxe that ehT llewkcoR hardness tset as debircsed ni this retfa eht noitacilppa fo eht ronim daol eht standard senimreted eht hardness fo plastics htped rotacidni shall eb tes ot orez nihtiw 10 s as a noitcnuf fo rotnedni htped fo noitartenep and eht rojam daol yletaidemmi .deilppa retfa gniwolla rof citsale yrevocer fo eht tset D gniru 15 s fo noitacilppa fo eht rojam ,daol .nemiceps As ,hcus eht llewkcoR hardness no evresbo and drocer eht htped fo noitartenep ni eht ,,I M and R selacs tonnac eb detaler ot units fo 0.002 mm ( dh = htped fo noitartenep eht ball noitatnedni hardness derusaem ni ecnadrocca htiw SI 13360 traP( teS/S )21 : 1992. Jlca0+1< .,ra \ ecniS this sevired hardness morf eht htped fo noitartenep fo eht rotnedni rednu daol ( that is, A-2 EXPRESSION OF RESULTS ton gniwolla rof yna citsale yrevocer fo eht etaluclaC eht llewkcoR - a hardness using eht .lairetam ,revewoH eht llewkcoR apparatus noitauqe yam eb desu ot enimreted hardness morf eht Ru = 150 - ( & - & ) htped fo noitartenep rednu daol and this has erehw neeb dezidradnats as eht llewkcoR - u .tset ehT ylno elbatius llewkcoR elacs rof -reted Ra is eht llewkcoR hardness .rebmun gninim eht llewkcoR - a hardness fo plastics ds and dh era as denifed ni A-l.2 and is ,eht R ,elacs that is, 12.7 mm retemaid A-1.3. rotnedni and 588.4 N rojam .daol A-3 RELATIONSHIP BETWEEN A-l PROCEDURE ROCKWELL-cr HARDNESS AND BALL INDENTATION HARDNESS A.l.l esU eht 12.7 mm retemaid rotnedni and 588.4 N rojam .daol ehT dehsilbatse lacitamehtam pihsnoitaler neewteb a-llewkcor hardness and eht ball noitatnedni hardness fo SI 13360 ( traP teS/S A-i.2 enimreteD eht spring tnatsnoc fo eht gnitset enihcam as swollof : ecalP a tfos reppoc 12 ) : 1992 setartsnomed that eht lacitamehtam pihsnoitaler sdloh doog ni ecitcarp rof htob kcolb ( at tsael 6 mm kciht ) no eht mroftalp gnittesomreht and citsalpomreht slairetam revo and ylppa eht ronim .daol teS eht -htped eht egnar fo cc-llewkcoR hardness neewteb gnitacidni ecived ot orez and ylppa eht rojam .daol Maintain eht rojam daol litnu eht htped 02- and 100. sihT pihsnoitaler is nevig htiw rotacidni is .yranoitats etoN eht ,gnidaer tneiciffus ycarucca yb eht :noitauqe evomer eht rojam daol and tser eht htped rotacidni ot .orez taepeR this ecneuqes fo snoitarepo litnu eht gnidaer fo eht htped -idni rotac is tnatsnoc retfa hcae noitacilppa fo eht ro rojam .daol sihT stneserper eht tniop at hcihw on rehtruf noitartenep fo eht reppoc kcolb sekat secalp and erofereht eht tnatsnoc htped gnidaer is eht tnemevom fo eht -tacidni-htped gni ecived eud ot eht spring fo eht apparatus. A hparg fo Ra versus H ni eht egnar fo Ru etoN this tnatsnoc gnidaer and drocer ti as eht morf 03- ot 130 follows rof esae fo rebmun fo 0.002 mm units ( ds .) .noisrevnoc IS 13360 ( Part 5/Set 13 ) : 1992 130 120 - a110 -: ;100 - f9a -. ;a0 - “w 70 - g 60 - 250 - Z&O - ,: 30 - G: 20 - 5 10 - g o- -10 - -20 - -30’ ’ ’ I I I I I I I 1 I I I I I 2 L 6 8 10 12 1.4 16 i8 20 22 2L 26 28 30 32 BALL INDENTATION HARDNESS, daN/ mm2 FIG. 1 GRAPH SHOWING THE RELATIONSHIP BETWEEN ROCKWELL-c( HARDNESS AND ROCKWELL HARDNESS FOR EASE OF CONVERSION