Mabotolo a ASTM A490 motsutsana ndi ASTM A325

Mabotolo onse a ASTM A490 ndi ASTM A325 ndi olemera kwambiri.mabolitiKodi mukudziwa kusiyana pakati pa ASTM A490 ndi ASTM A325? Lero, tiyeni tikambirane za izi.

Yankho losavuta ndilakuti mabotolo a hexagonal olemera a ASTM A490 amafunikira mphamvu zambiri kuposa mabotolo a hexagonal olemera a A325. Mabotolo a A325 ali ndi mphamvu yocheperako yogwira ntchito ya 120ksi, pomwe mabotolo a A490 ali ndi mphamvu yogwira ntchito ya 150-173ksi.

Kuphatikiza pa izi, palinso kusiyana kwina pakati pa A490 ndi A325.

Kapangidwe ka Zinthu

• Mabotolo a A325 amapangidwa ndi chitsulo champhamvu cha kaboni chapakati, ndipo mabotolo odziwika kwambiri amapezeka mu zomangamanga.
• Mabotolo a A490 amapangidwa ndi chitsulo champhamvu kwambiri chokonzedwa ndi kutentha
• Mabotolo a A325 omangidwa akhoza kukhalachoviikidwa m'madzi otenthandipo amapezeka kwambiri ndi chophimba chimenecho. Maboluti a A325 galvanized ndi otchuka chifukwa cha mphamvu zawo zolimbana ndi dzimbiri.
• Mabotolo a A490 ndi olimba, sangathe kutenthedwa ndi galvanized chifukwa cha mphamvu imeneyi. Chifukwa cha mphamvu yayikulu yogwira mabotolo a A490, ali pachiwopsezo cha kusweka kwa haidrojeni chifukwa cha galvanization. Izi zingayambitse kulephera kwa botolo msanga ndipo zitha kukhala zopanda mphamvu.

Zophimba

Kapangidwe

Mabotolo onse a A3125 ndi A325 amagwera pansi pa ASTM F490 ndipo amagwiritsidwa ntchito makamaka pa mabotolo omangira. Kawirikawiri, mabotolo omangira ndi ma botolo olemera a hex kapena ma bolt olamulira kupsinjika omwe nthawi zambiri amakhala afupiafupi, afupiafupi kuposa ulusi wamba, ndipo sangachepetse kukula kwa thupi.

Malinga ndi mwambo, zina zosiyapo zimaloledwa. Isanafike chaka cha 2016, ASTM A325 ndi ASTM A490 zinali zosiyana. Kuyambira pamenepo zasinthidwa kukhala magulu mu F3125. Poyamba, ma bolt a A325 ndi A490 amayenera kukhala ndi mutu wolemera wa hex ndipo palibe makonzedwe ena omwe amaloledwa. Kuphatikiza apo, kutalika kwa ulusi waufupi sikungasinthidwe.

Komabe, malinga ndi mfundo zatsopano za F3125, kalembedwe kalikonse ka mutu kamaloledwa ndipo kutalika kwa ulusi kumatha kusinthidwa. Kusintha kwa kasinthidwe ka A325 ndi A490 kumafotokozedwa powonjezera "S" ku chizindikiro chokhazikika cha mutu.

Kusiyana kwina kwa kutalika kwa ulusi ndi kwakuti ma bolt a A325 amapangidwa mochuluka mu mtundu wa ulusi wonse, bola ngati ali ndi mainchesi anayi kapena kuchepera. Mtundu uwu wa bolt nthawi zambiri umatchedwa A325T. Mtundu wonse wa bolt wa A325 uwu supezeka pa ma bolt a A490.

Kuyesa

Maboluti a A325 galvanized omwe akugulidwa ndi nati ndi makina ochapira olimba amafunika kuyesedwa mphamvu yozungulira. Kuyesa mphamvu yozungulira kumatsimikizira kuti gulu la boluti likhoza kupanga mphamvu yoyenera yolumikizira. Kuti mupambane mayesowo, gululi liyenera kufika pamlingo wocheperako wozungulira ndikupeza mphamvu yofunikira lisanagwe zomwe zimatengera kukula ndi kutalika kwa boluti ya A325 galvanized. Popeza maboluti a A490 sangagwe pa galvanized, mayesowa sagwira ntchito.

Maboluti onse a A490 ayenera kupambana mayeso a tinthu ta maginito. Mayesowa amagwiritsidwa ntchito kuonetsetsa kuti palibe zolakwika kapena ming'alu pansi pa chitsulo cha boluti ya A490. Mayesowa safunikira pa maboluti a A325.

ASTM A490

Mfundo Yofunika Kwambiri

Pomaliza pake, mainjiniya wanu adzatchula mtundu wa bolt ya F3125 yomwe muyenera kugwiritsa ntchito, koma ndikofunikira kumvetsetsa kusiyana pakati pa magiredi a A325 ndi A490. Giredi ya A490 ndi yolimba kuposa giredi ya A325, koma mphamvu si chinthu chokhacho chomwe chimatsimikizira bolt. Mabolt a A490 sangaviidwe ndi kutentha kapena galvanized yamakina. Giredi ya A325 si yolimba kwambiri, koma ndi bolt yotsika mtengo yomwe ingathe kugandidwa kuti ipewe dzimbiri.