ASTM A325 Vs A490: Maupangiri Osankhira Bolt Wopanga Kwa Akatswiri

-Maboti olimba kwambiri amagwira ntchito yofunika kwambiri popanga zitsulo. Zina mwa miyezo yodziwika kwambiri ndiChithunzi cha ASTM A325ndiChithunzi cha ASTM A490. Ngakhale zonse zidapangidwa kuti zizilumikizana ndi chitsulo, zimasiyana pamakina, kufananira ndi zokutira, komanso kuchuluka kwa ntchito. Kusankha giredi yolondola ya bawuti kumakhudza mwachindunji chitetezo chadongosolo, kutsata, komanso kutengera mtengo wa polojekiti.

 

Bukhuli limapereka kufananitsa komveka bwino kwaukadaulo kuthandiza mainjiniya ndi magulu ogula zinthu kupanga zisankho zomveka.

 

 

 

ASTM A325 ndi ASTM A490 ndi mabawuti aatali-amphamvu omwe amagwiritsidwa ntchito makamaka muzitsulo-ku-zolumikiza zitsulo monga nyumba, milatho, nsanja, ndi zomangira zamakampani olemera.

 

Mabawuti a ASTM A325 amapangidwa kuchokera kuchitsulo chapakati cha kaboni, chomwe chimazimitsidwa komanso kutenthedwa kuti chikhale cholimba kwambiri chomwe chimagwiritsidwa ntchito pamapangidwe ambiri.

 

Maboti a ASTM A490 amapangidwa kuchokera ku chitsulo cha alloy ndi kutentha-kukonzedwa kuti azitha kulimba kwambiri. Nthawi zambiri amagwiritsidwa ntchito m'mapulogalamu omwe amafunikira kuchuluka kwa mabawuti a A325.

 

Magiredi onse awiri nthawi zambiri amaikidwa m'masilipi-ofunika kwambiri kapena otengera{1}}zolumikizira zamtundu uliwonse ndipo amaumitsidwa kuti agwirizane ndi zomwe zatchulidwa kale.

 

 

Kusiyana kwakukulu kwaukadaulo pakati pa mabawuti a A325 ndi A490 kuli pakuchita mwamphamvu.

 

Katundu	Chithunzi cha ASTM A325	Chithunzi cha ASTM A490
Mtundu Wazinthu	Sing'anga Carbon Steel	Chitsulo cha Aloyi
Mphamvu Zochepa Zochepa	120 nsi	150 kodi
Mphamvu Zochepa Zokolola	92 kodi	130 ndi
Kulimba (HRC)	24–35	33–39
Kugwiritsa Ntchito Mwachizolowezi	Standard structural zitsulo	-malumikizidwe apamwamba kwambiri

 

Kuwonjezeka kwa mphamvu ya A490 kumapangitsa kuti pakhale katundu wapamwamba kwambiri kapena kuchepetsa kuchuluka kwa bawuti pamapangidwe ena. Komabe, mphamvu zapamwamba zimatanthauzanso kuchepetsedwa kwa ductility komanso zofunikira zowongolera unsembe.

 

Kwa nyumba zambiri zamalonda ndi mafelemu achitsulo wamba, A325 imakhalabe yokwanira. A490 nthawi zambiri imatchulidwa pamene kuwerengera kwamapangidwe kumafuna kukana kwambiri kwa katundu.

 

 

Nthawi Yomwe Mungagwiritsire Ntchito ASTM A325

 

Maboti a A325 amagwiritsidwa ntchito kwambiri mu:

* Nyumba zamalonda ndi zamafakitale

* Milatho yamsewu

* Malo osungiramo katundu ndi malo ogawa

* Malumikizidwe azitsulo amtundu uliwonse

 

Amapereka mphamvu zambiri, kupezeka, ndi mtengo-ochita bwino. Pama projekiti opanda kutsitsa kwambiri, ma bolt a A325 amakwaniritsa zofunikira zamakonzedwe bwino.

 

Nthawi Yomwe Mungagwiritsire Ntchito ASTM A490

 

Maboti a A490 amatchulidwa mu:

* Zomanga{0}}zokwera kwambiri

* Milatho-yaatali

* Kulumikizana kwa nsanja za turbine tower

* Mafakitale olemera kapena magetsi

 

Pazifukwa izi, kugwira ntchito limodzi pansi pazovuta kwambiri komanso kumeta ubweya kumapangitsa kugwiritsa ntchito A490.

 

Mainjiniya akuyenera kuwonetsetsa kuti ma torque akuwongolera moyenera ndikuyikapo, chifukwa-maboti amphamvu amatha kumva bwino akamangidwa mosayenera.

 

 

Kuyanjana kwamankhwala apamtunda ndiko kusiyanitsa kwakukulu pakati pa magulu awiriwa.

 

Maboti a ASTM A325 amapezeka nthawi zambiri mu:

* Kumaliza komaliza

* Zinc plating

* Kutentha-dip galvanizing

 

Hot-dip galvanizing ndi yovomerezeka kwambiri pamaboti a A325, kuwapanga kukhala oyenera kunja komanso malo owononga.

 

Maboti a ASTM A490, chifukwa cha kuuma kwawo kwakukulu, nthawi zambiri amakhalaosavomerezeka kuti azitentha-dip galvanizingchifukwa cha kuopsa kwa hydrogen embrittlement. Nthawi zambiri amaperekedwa m'malo omveka bwino kapena opangidwa ndi makina.

 

Kwa mapulojekiti okhala m'mphepete mwa nyanja kapena{0}}achinyezi chambiri, kusiyanaku kumakhudza kwambiri kusankha magiredi.

 

 

Mabawuti a A490 ndi okwera mtengo kwambiri chifukwa cha kapangidwe ka aloyi komanso zofunikira pakuwongolera mphamvu. Ngakhale kuti amapereka mphamvu zolemetsa kwambiri, sizomwe zimakhala zabwinoko.

 

Kugwiritsa ntchito A490 pamapulogalamu omwe A325 ndi yokwanira kumawonjezera mtengo wa projekiti popanda phindu lofananira. Kusanthula kwadongosolo koyenera kuyenera kudziwa ngati mphamvu zowonjezera ndizofunikira.

 

Magulu ogula zinthu akuyenera kugwirizanitsa kusankha kwa giredi ya bolt ndi mawerengedwe a uinjiniya m'malo mosintha malinga ndi zomwe zili zapamwamba.

 

 

Posankha pakati pa ASTM A325 ndi A490 bolts, ganizirani:

 

1. Zofunikira zolemetsa zopanga

2. Mtundu wa kulumikizana (bearing vs slip-zofunikira)

3. Kuwonekera kwa chilengedwe ndi ngozi ya dzimbiri

4. Kugwirizana kwa chithandizo chapamwamba

5. Zolepheretsa bajeti ndi kupezeka

 

Kugwirizana pakati pa akatswiri opanga zomangamanga ndi ogulitsa ma fastener kumatsimikizira kutsata miyezo ya ASTM ndikukhathamiritsa mtengo ndi magwiridwe antchito.

 

 

 

Ma bolt onse a ASTM A325 ndi ASTM A490 amagwira ntchito yofunika kwambiri pakumanga zitsulo. Kusankha koyenera kumatengera zomwe zimafunikira, momwe chilengedwe chimakhalira, komanso momwe polojekiti ikuyendera.

 

A325 imapereka magwiridwe antchito odalirika pamapulogalamu ambiri amapangidwe okhala ndi kusinthasintha kwakukulu kwa zokutira. A490 imapereka mphamvu zapamwamba pazofunikira zauinjiniya koma zimafunikira kuyika kolimba komanso kuwongolera dzimbiri.

 

Kuyang'anitsitsa zofunikira za kamangidwe kumapangitsa kuti pakhale zotetezeka, zogwirizana, komanso zotsika mtengo-zosankha bwino bawuti.