Chitoliro chowoneka bwino chopangidwa chimapangidwa kuti chiwombedwe patsamba lake / ... Akuluakulu, chitsulo, mitanda, mitanda, ma stabs, kuchepa, chipika chipi. Nkhaniyi itha kukhala chitsulo cha Carbor Astm A234, Astm A420, Shamel ASTEL ASTM A420.
321 Chitsulo chosapanga dzimbiri, chomwe chimadziwikanso kuti ndi S32100 ndi kalasi 321, makamaka ndi mangunor, 5% a phosphorous ndi sulfure, 5 x (c + n) ndi chitsulo. Ponena za kukana kwa chimbudzi, chitsulo chosapanga dzimbiri kuli kofanana ndi kalasi 304 mu chikhalidwe cha Anner 304 muzovala ndipo ndipamwamba ngati ntchitoyo imaphatikizapo ntchito mu 797¡2 f. 321 Zitsulo zosapanga dzimbiri kuphatikiza mphamvu zapamwamba, kukana kufooka ndi gawo lokhazikika pokana kuwonongera kolowera.