ASTM A252 ndi muyezo womwe umapangidwira kuti ugwiritsidwe ntchito ndi mapaipi achitsulo.
ASTM A252 imagwira ntchito pamilu ya mapaipi momwe silinda yachitsulo imakhala ngati membala wonyamula katundu wokhazikika, kapena ngati chipolopolo chopanga milu ya konkriti.
Sitandade 2 ndi giredi 3 ndi awiri mwa magirediwa.
A252 imagawidwa m'makalasi atatu okhala ndi makina osinthika motsatizana.
Iwo anali: Grade 1, Grade 2, ndiGulu 3.
Giredi 2 ndi Grade 3 ndi magiredi omwe amagwiritsidwa ntchito kwambiri mu ASTM A252, ndipo timafotokoza mwatsatanetsatane zamagulu onsewa.
ASTM A252Itha kupangidwa ndi njira zowotcherera zopanda msoko, zopinga, kuwotcherera kwa flash, kapena njira zowotcherera.
M'machubu azitsulo, machubu achitsulo osasunthika amapereka chithandizo chabwino kwambiri chifukwa cha mphamvu zawo zazikulu komanso mawonekedwe amphamvu.
Kuonjezera apo, machubu achitsulo osasunthika amatha kupangidwa ndi makulidwe a khoma lakuda kwambiri, zomwe zimawathandiza kuti athe kupirira zovuta zambiri, kupititsa patsogolo kudalirika kwawo muzinthu zothandizira.
Komabe, mipope yachitsulo yopanda msoko imatha kupangidwa mpaka kufika pamtunda wa 660 mm, zomwe zimalepheretsa kugwiritsidwa ntchito kwawo pamapulogalamu omwe amafunikira milu yayikulu yambiri.Pamenepa,Mtengo wa LSAW(Longitudinal Submerged Arc Welded) ndiChithunzi cha SSAW(Spiral Submerged Arc Welded) mapaipi achitsulo ndi opindulitsa kwambiri.
Phosphorous sayenera kupitirira 0.050%.
Palibe zinthu zina zofunika.
Kulimba Kwamphamvu ndi Kupereka Mphamvu kapena Zokolola
| Gulu 2 | Gulu 3 | |
| Mphamvu zolimba, min | 60000 psi[415 MPa] | 60000 psi[415 MPa] |
| Malo okolola kapena Mphamvu zokolola, min | 35000 psi[240 MPa] | 45000 psi[310 MPa] |
Elongation
Zambiri zitha kupezeka muTsatanetsatane wa Chitoliro cha ASTM A252.
| Mndandanda | Sinthani | Mbali |
| Kulemera | Theoretical Weight | 95% - 125% |
| Kunja Diameter | Kutchulidwa Kunja Diameter | ± 1% |
| Makulidwe a Khoma | Kunenepa mwadzina khoma | mphindi 87.5% |
| Kutalika kwachisawawa kamodzi | Mamita 16 mpaka 25 [mamita 4.88 mpaka 7.62], inchi |
| Utali wowirikiza kawiri | kupitirira mamita 7.62 ndi pafupifupi mamita 10.67 [mamita 10.67] |
| Utali wofanana | kutalika monga momwe zafotokozedwera ndi kusintha kovomerezeka kwa ±1 mkati. |
ASTM A370: Njira Zoyesera ndi Tanthauzo la Kuyesa Kwamakina kwa Zazitsulo Zazitsulo;
ASTM A751: Njira Zoyesera, Kachitidwe, ndi Terminology ya Chemical Analysis of Steel Products;
ASTM A941: Terminology Yokhudzana ndi Zitsulo, Zitsulo Zosapanga dzimbiri, Zosakaniza Zogwirizana, ndi Ferroalloys;
ASTM E29: Yesetsani Kugwiritsa Ntchito Ma Digits Ofunika Pamayeso Oyesa Kuti Mudziwe Kugwirizana ndi Zomwe Zafotokozedwa;
Botop Steel ndiwopanga chitoliro chachitsulo chachitsulo cha welded wapamwamba kwambiri komanso wogulitsa kuchokera ku China, komanso chitoliro chachitsulo chosasunthika, chomwe chimakupatsirani mayankho osiyanasiyana achitsulo!
ASTM A252 GR.3 Structural LSAW(JCOE) Chitoliro Chachitsulo cha Carbon
