1.Chitsulo chachitsulo ndi mtundu wa alloy wachitsulo wopangidwa kuti ugwiritsidwe ntchito pazida zosiyanasiyana ndi zigawo zamakina.Mapangidwe ake apangidwa kuti apereke kuphatikiza kuuma, mphamvu, ndi kukana kuvala.Zitsulo za zida nthawi zambiri zimakhala ndi mpweya wambiri (0.5% mpaka 1.5%) ndi zinthu zina zophatikizira monga chromium, tungsten, molybdenum, vanadium, ndi manganese.Kutengera ndikugwiritsa ntchito, zitsulo zazitsulo zitha kukhalanso ndi zinthu zina zosiyanasiyana, monga faifi tambala, cobalt, ndi silicon.
2.Kuphatikizika kwapadera kwa zinthu zomwe zimagwiritsidwa ntchito popanga chida chachitsulo zidzasiyana malinga ndi zomwe mukufuna komanso ntchito.Zida zomwe zimagwiritsidwa ntchito kwambiri zimatchedwa zitsulo zothamanga kwambiri, zitsulo zozizira, komanso zitsulo zotentha kwambiri. "