tradução iso 898-1 - parcial

8/10/2019 Traduo ISO 898-1 - Parcial

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Mechanical properties of fasteners made of carbon steeland alloy steelPart 1:Bolts, screws and studs with specied property classes

Coarse thread and ne pitch threadCaractristiques mcaniques des lments de fxation en acier au

carbone et en acier alli Partie 1: Vis, goujons et tiges fletes de classes de qualit

spcifes Filetages pas gros et fletages pas fn

1 Scope

This part of ISO 898 species mechanical and physical properties of bolts,screws and studs made of carbon steel and alloy steel when tested at anambient temperature rane of 1! "# to $% "#& 'asteners (the term usedwhen bolts, screws and studs are considered all toether) that conform tothe re*uirements of this part of ISO 898 are e+aluated at that ambienttemperature rane& They miht not retain the specied mechanical andphysical properties at ele+ated temperatures (see nne- .) and/or lowertemperatures&0sta parte da ISO 898 especica as propriedades mecnicas e f2sicas dosparafusos, parafusos e prisioneiros de a3o carbono e a3o4lia, *uandotestado em uma temperatura ambiente de 1!"# a $%"#& 'i-adores (termo

usado *uando parafusos, parafusos e prisioneiros s5o analisados emcon6unto) *ue este6am em conformidade com os re*uisitos desta parte daISO 898 s5o a+aliados nessa fai-a de temperatura ambiente& 0les podemn5o manter as propriedades mecnicas e f2sicas especicadas atemperaturas ele+adas (+er ne-o .) e/ou em temperaturas mais bai-as&

7OT0 1 'asteners conformin to the re*uirements of this part of ISO 898are used in applications ranin from %! "# to 1%! "#& sers aread+ised to consult an e-perienced fastener metallurist for temperatures

outside the rane of %! "# to 1%! "# and up to a ma-imumtemperature of $!! "# when determinin appropriate choices for a i+enapplication&7OT 1 'i-adores em conformidade com os re*uisitos desta parte da ISO898 s5o usados em aplica3;es *ue +ariam de 4%!"# a 1%!"#& Os usu umatemperatura m


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7OT ?: Informa3;es para a sele35o e aplica35o de a3os para uso emtemperaturas mais bai-as ou mais ele+adas > dado, por e-emplo, nasnormas 07 1!?@9, STA '??81 e STA $?! / $?!A&

#ertain bolts and screws miht not full the tensile or torsionalre*uirements of this part of ISO 89841 because the eometry of their heads

reduces the shear area in the head compared to the stress area in thethread& These include bolts and screws ha+in a low or countersunB head(see 8&?)ertos parafusos podem n5o satisfaCer os re*uisitos de tens5o ou detor35o desta parte da norma ISO 89841, por*ue a eometria de suascabe3as reduC a


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E Hesistncia D corros5o,E resistance to shear stress,E Hesistncia ao cisalhamento,E tor*ue/clamp force performance (for test method, see ISO 1@!GJ), orE desempenho de tor*ue/for3a de fechamento (para m>todo de ensaio,+er ISO 1@!GJ), ou

E fatiue resistance&E Hesistncia D fadia&


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3 Terms and denitions3 Termos e denies'or the purposes of this document, the followin terms and denitionsapply&Para efeitos do presente documento, aplicam4se os seuintes termos edeni3;es&

3!1nished fastenerfastener for which all manufacturin steps ha+e been completed, with orwithout any surface coatin and with full or reduced loadability, and whichhas not been machined into a test piece3!1"adores acabados-ador na *ual todas as etapas de fabrica35o foram realiCadas, com ousem *ual*uer re+estimento de superf2cie e com a capacidade de caratotal ou reduCida, e *ue n5o foi usinado para um corpo de pro+a

3!#machined test piecetest piece machined from a fastener to e+aluate material properties3!#corpo de pro$a usinadocorpo de pro+a usinado oriundo de um -ador para a+alia35o daspropriedades do material&

3!3full%si&e fastenernished fastener with a shanB diameter of ds K d or ds L d, or screwthreaded to the head, or fully threaded stud

3!'fastener with reduced shan(nished fastener with a shanB diameter of dsK d?

3!)fastener with waisted shan(nished fastener with a shanB diameter of dsM d?

3!*base metal hardnesshardness closest to the surface (when tra+ersin from core to outsidediameter) 6ust before an increase or decrease occurs, denotin,

respecti+ely, carburiCation or decarburiCation

3!+carburi&ation


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result of increasin surface carbon to a content abo+e that of the basemetal

3!decarburi&ationloss of carbon at the surface of a steel fastener

3!-partial decarburi&ationdecarburiCation with suNcient loss of carbon to cause a lihter shade oftempered martensite and a sinicantly lower hardness than that of thead6acent base metal, without, howe+er, showin ferrite rains undermetalloraphic e-amination

3!1.ferritic decarburi&ationdecarburiCation with suNcient loss of carbon to cause a lihter shade oftempered artensite and a sinicantly lower hardness than that of thead6acent base metal, with the presence of ferrite rains or rainboundarynetworB under metalloraphic e-amination

3!11complete decarburi&ationdecarburiCation with suNcient carbon loss to show only clearly denedferrite rains under metalloraphic e-amination

' Symbols and abbre$iated terms

'or the purposes of this document, the symbols and abbre+iated termsi+en in ISO ??% and ISO 9@%41, and the followin apply&

Percentae elonation after fracture (of machined test piece),

f 0lonation after fracture for full4siCe fastener

s,nom 7ominal stress area in thread, mm

ds #ross4sectional area of waisted shanB, mm

b Thread lenth, mm

bm Thread lenth of stud metal end, mm

d 7ominal thread diameter, mm

d! Qiameter of machined test piece, mm


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d1 .asic minor diameter of e-ternal thread, mm

d? .asic pitch diameter of e-ternal thread, mmd$ Ainor diameter of e-ternal thread, mmda Transition diameter (internal diameter of the bearin face), mmdh Role diameter of wede or blocB, mm

ds Qiameter of unthreaded shanB, mm! Reiht of non4decarburiCed Cone in thread, mmFm ltimate tensile load, 7Fm,min Ainimum ultimate tensile load, 7Fp Proof load, 7Fpf oad at !,!!G8d non4proportional elonation for full4siCefastener, 7" Qepth of complete decarburiCation in thread, mm# Reiht of fundamental trianle, mm#1 Reiht of e-ternal thread in ma-imum material condition, mm$ Reiht of the head, mm%+ mpact strenth,

tradução iso 898-1 - parcial

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