Iibholiti ze-ASTM A490 vs. ASTM A325

Zombini ii-ASTM A490 kunye nee-ASTM A325 Bolts zizinto eziqinileyo zesakhiwo se-hexiibholitiNgaba uyazi umahluko phakathi kwe-ASTM A490 kunye ne-ASTM A325? Namhlanje, masithethe ngayo.

Impendulo elula kukuba ii-ASTM A490 heavy-duty heavy-duty heavy-duty heavy-duty heavy-duty heavy-duty heavy-duty heavy-duty heavy-duty heavy-duty heavy-duty heavy-duty heavy. Ii-A325 bolts zinamandla okutsalwa ubuncinane angama-120ksi, ngelixa ii-A490 bolts zinoluhlu lwamandla okutsalwa angama-150-173ksi.

Ukongeza koku, kukho eminye imahluko phakathi kwe-A490 kunye ne-A325.

Ukwakhiwa kwezinto

• Iibholiti zesakhiwo ze-A325 zenziwe ngentsimbi yekhabhoni ephakathi enamandla aphezulu, kwaye zezona zixhaphakileyo ezifumaneka kulwakhiwo lwezakhiwo.
• Iibholiti zesakhiwo ze-A490 zenziwe ngentsimbi enamandla kakhulu ephathwa ngobushushu
• Iibholiti zesakhiwo ze-A325 zinokubai-hot-dip egalelwe nge-galvanisedkwaye zifumaneka rhoqo kuloo ngubo. Iibholiti ze-A325 galvanized zithandwa ngenxa yeempawu zazo zokumelana nokugqwala.
• Iibholiti zesakhiwo ze-A490 ziqinile, azinakufakwa kwi-hot-dip galvanized ngenxa yale mandla. Ngenxa yamandla aphezulu okutsalwa kweebholiti ze-A490, zisengozini yokuqhekeka yi-hydrogen ngenxa ye-galvanizing. Oku kunokukhokelela ekuwohlokeni kwangethuba kwebholiti kwaye kusenokungabi namandla ngokwesakhiwo.

Iingubo zokwaleka

Uqwalaselo

Zombini ii-bolts ze-A3125 kunye ne-A325 ziwela phantsi kwe-ASTM F490 kwaye zisetyenziselwa ngokukodwa ii-bolts zesakhiwo. Ngokwesiqhelo, ii-bolts zesakhiwo zii-bolts ze-hex ezinzima okanye ii-bolts zokulawula uxinzelelo ezihlala zifutshane ngobude, zimfutshane kunomsonto oqhelekileyo, kwaye azinakunciphisa ububanzi bomzimba.

Ngokwesiqhelo, ezinye iimeko ezingaqhelekanga ziyavunyelwa. Ngaphambi kowama-2016, i-ASTM A325 kunye ne-ASTM A490 zaziziinkcukacha ezahlukeneyo. Ukususela ngoko ziye zahlulwahlulwa njengeeklasi kwiinkcukacha ze-F3125. Ekuqaleni, ii-bolts ze-A325 kunye ne-A490 kwakufuneka zibe nentloko enzima ye-hex kwaye akukho ezinye iindlela ezivunyelweyo. Ukongeza, ubude obufutshane bomsonto abunakutshintshwa.

Nangona kunjalo, ngokweenkcukacha ezintsha ze-F3125, naluphi na uhlobo lwentloko luvumelekile kwaye ubude bomsonto bungatshintshwa. Utshintsho kwiindlela eziqhelekileyo ze-A325 kunye ne-A490 zichazwe ngokongeza u-“S” kuphawu olusisigxina lokuthambeka kwentloko.

Omnye umahluko kubude bomsonto kukuba ii-bolts ze-A325 ziveliswa ngobuninzi kwinguqulelo egcweleyo, ukuba nje zinobude obuziimitha ezine okanye ngaphantsi. Olu hlobo lwe-bolt lubizwa ngokuba yi-A325T. Inguqulelo epheleleyo ye-bolts ze-A325 ayifumaneki kwii-bolts ze-A490.

Uvavanyo

Iibholiti ze-A325 galvanized ezithengwa nge-nut kunye ne-washer eqinileyo kufuneka zivavanywe umthamo wokujikeleza. Uvavanyo lomthamo wokujikeleza luqinisekisa ukuba i-bolt assembly iyakwazi ukuphuhlisa amandla okubamba afanelekileyo. Ukuze iphumelele uvavanyo, i-assembly kufuneka ifikelele kumlinganiselo omncinci wokujikeleza kwaye ifikelele kuxinzelelo olufunekayo ngaphambi kokuba ingasebenzi oluxhomekeke kububanzi kunye nobude bebholiti ye-A325 galvanized. Ekubeni iibholiti ze-A490 zingenakwenziwa i-galvanized, olu vavanyo alusebenzi.

Zonke iibholiti ze-A490 kufuneka ziphumelele uvavanyo lwe-magnetic particle. Olu vavanyo lusetyenziselwa ukuqinisekisa ukuba akukho ziphene okanye iintanda ezingaphantsi komhlaba kwintsimbi yebholiti ye-A490. Olu vavanyo alufuneki kwiibholiti ze-A325

I-ASTM A490

Okukwintsusa

Ekugqibeleni, injineli yakho iya kuchaza ukuba loluphi uhlobo lwebholthi yolwakhiwo lwe-F3125 ekufuneka uyisebenzise, ​​kodwa kubalulekile ukuqonda umahluko phakathi kwamanqanaba e-A325 kunye ne-A490. Uhlobo lwe-A490 lunamandla kune-A325, kodwa amandla ayilo kuphela into emisela ibholthi. Iibholthi ze-A490 azinakufakwa kwi-hot-dip okanye kwi-mechanically galvanised. Uhlobo lwe-A325 alunamandla kangako, kodwa yibholthi enexabiso eliphantsi enokugalelwa kwi-galvanised ukuze kuthintelwe ukugqwala.