Sinjanji yachitsulo imagawidwa kukhala njanji zanjanji, njanji zopepuka, njanji zoyendetsa ndi njanji za crane.Mawonekedwe amtundu wa njanji amapangidwa ndi gawo lokhala ngati I lomwe limapindika bwino kwambiri, mutu wa njanji, chiuno cha njanji ndi pansi pa njanji.
(1) njanji yachitsulo ya njanji
Njanji zachitsulo zotsika za alloy zimapangidwa pamaziko a njanji za carbon.Sitima yapamtunda ya carbon ndi low alloy steel ili ndi mphamvu zambiri, kukana kuvala bwino, kukana kupanikizika, kukana kwa brittle fracture komanso kutopa kwapang'onopang'ono kuposa njanji ya carbon.Mitundu ya njanji yogwiritsira ntchito njanji ndi 38, 43, 50, 60 ndi 75kg/m, ndi zina zotero. Chisamaliro chapadera chiyenera kuperekedwa kuti tipewe mawanga oyera pakupanga njanji.
(2) Njanji yachitsulo yopepuka
Amagwiritsidwa ntchito kwambiri mumigodi ndi nkhalango, ndipo mitundu yake ndi 5,8,11,15,18 ndi 24 kg/m.Sitima yachitsulo yopepuka imapangidwa makamaka ndi chitsulo cha kaboni, ndipo ochepa amapangidwa ndi chitsulo chochepa cha alloy.Njanji zopepuka zachitsulo zomwe zimagwiritsidwa ntchito m'migodi, pansi pa nthaka ndi nkhalango zimafunikira kukana kwa dzimbiri, motero zinthu zoyenera za alloy monga mkuwa, chromium, phosphorous ndi vanadium zimawonjezeredwa kuchitsulo.
(3) Sitima yachitsulo yoyendetsa
Njanji yachitsulo yomwe imagwiritsidwa ntchito poyendetsa magetsi mu njanji yapansi panthaka imafuna madulidwe abwino, ndiye kuti, resistivity pa 15 ℃ ndi yochepera 0.125 μ ω m.Amapangidwa ndi chitsulo chotsika kwambiri cha carbon aluminium chophedwa.
(4) Njanji yachitsulo ya crane
Kapangidwe kakemidwe ndi kupanga njanji zapadera zazitsulo zomwe zimagwiritsidwa ntchito popanga njanji zosiyanasiyana zowongolera ma crane ndizofanana ndi za njanji zachitsulo.Mitunduyi ndi QU70, QU80, QUl00, QUl20 ndi zina zotero