ASTM A490 vs. ASTM A325 Bolts

Ose ari maviri ASTM A490 uye ASTM A325 Bolts anorema hex chimiromabhaudhi. Iwe unoziva here musiyano uripo pakati peASTM A490 neASTM A325? Nhasi ngatimbotaura nezvazvo.

Mhinduro iri nyore ndeyekuti ASTM A490 inorema-basa hexagonal mabhaudhi ane yakakwirira simba zvinodiwa kupfuura A325 inorema-basa hexagonal mabhaudhi. Mabhaudhi eA325 ane simba shoma rekusimba re120ksi, ukuwo mabhaudhi eA490 ane simba rekusimba re150-173ksi.

Pamusoro peizvi, pane mimwe misiyano pakati peA490 neA325.

Kuumbwa Kwezvinhu

• Mabhaudhi eA325 anogadzirwa kubva kusimba repakati kabhoni simbi, uye mabhaudhi anowanikwa mukuvaka zvivakwa.
• Mabhaudhi eA490 anogadzirwa kubva kune yakakwirira-simba rinopisa-yakagadziriswa simbi
• A325 zvimiro mabhaudhi anogona kuvakupisa-kunyura kwakakurudzirauye anowanzo kuwanikwa aine coating iyoyo. Mabhaudhi eA325 ane mukurumbira nekuda kwekusaonda kwawo.
• Mabhaudhi eA490 ane simba, haagone kuve anopisa-dip galvanized nekuda kwesimba iri. Nekuda kwekusimba kwakanyanya kwemabhaudhi eA490, vari panjodzi yehydrogen embrittlement nekuda kwekuputika. Izvi zvinogona kutungamira mukukundikana kwebhaudhi nguva isati yakwana uye inogona kuve isina kusimba.

Coatings

Configuration

Ose maA3125 uye A325 mabhaudhi anowira pasi peiyo ASTM F490 yakatarwa uye anonyanya kushandiswa mabhaudhi ezvimiro. Kazhinji, mabhaudhi ezvimiro anorema-basa hex mabhaudhi kana tension control mabhaudhi anowanzo ari mapfupi pakureba, mapfupi pane avhareji shinda, uye haakwanise kuderedza dhayamita yemuviri.

Maererano netsika, zvimwe zvisiri izvo zvinobvumirwa. Gore ra2016 risati rasvika, ASTM A325 uye ASTM A490 dzaive zvirevo zvakasiyana. Ivo kubva ipapo vakadzokororwa semakirasi mune iyo F3125 yakatarwa. Pakutanga, mabhaudhi eA325 neA490 aifanira kuve nemusoro unorema wehekisi uye hapana kumwe kurongwa kwaibvumidzwa. Mukuwedzera, urefu hweshinda hupfupi haugoni kuchinjwa.

Zvisinei, maererano netsva F3125 tsanangudzo, chero chimiro chemusoro chinobvumirwa uye urefu hwetambo hunogona kuchinjwa. Shanduko kune yakajairwa A325 uye A490 zvigadziriso zvinotsanangurwa nekuwedzera "S" kune inogara yakatenuka marker yemusoro.

Mumwe mutsauko pakureba kweshinda ndewekuti mabhaudhi eA325 anogadzirwa-huru mushanduro ine shinda yakazara, chero ari madhayamita mana kana mashoma pakureba. Iri rudzi rwebhoti rinowanzo kunzi A325T. Iyo yakazara threaded vhezheni yeiyi A325 bolt haiwanikwe yeA490 mabhaudhi.

Testing

Mabhaudhi eA325 ari kutengwa nenzungu uye newachi yakaomeswa anodiwa kuti aongororwe kugona kwekutenderera. Yekutenderera yekuyedza bvunzo inoita kuti bhaudhi rikwanise kugadzira iro rakakodzera clamping simba. Kuti upfuure bvunzo, gungano rinofanira kusvika pachiyero chidiki chekutenderera uye kuzadzisa tension inodiwa isati yatadza zvinoenderana nehupamhi uye kureba kwebhaudhi A325. Sezvo maA490 mabhaudhi asingagone kuvezwa, bvunzo iyi haishande.

Ese maA490 mabhaudhi anofanira kupasa magineti particle bvunzo. Muedzo uyu unoshandiswa kuona kuti hapana hurema hwepasi-pasi kana kutsemuka musimbi yeA490 bolt. Uyu bvunzo haudiwe kune A325 mabhaudhi

ASTM A490

Pazasi Line

Pakupedzisira, mainjiniya wako anozotsanangura kuti nderipi giredhi reF3125 bhaudhi rekuvaka raunoda kushandisa, asi zvakakosha kuti unzwisise mutsauko uripo pakati peA325 neA490 mamakisi. A490 giredhi rakasimba kupfuura A325 giredhi, asi simba handiro chete chinhu chinotema bhaudhi. Mabhaudhi eA490 haagone kunyudzwa-kunyudzwa kana kuitwa nemagetsi. Iyo A325 giredhi haina kusimba, asi ibhaudhi remutengo wakaderera rinogona kuiswa marata kuti isaora.