Q345 opanda aloyi chitoliro cha otsika aloyi mndandanda - otsika aloyi mkulu mphamvu structural zitsulo (GB / t1591-1994).Q345A, B, C, D ndi E ndi magiredi oyimira zitsulo zamtunduwu.Poyerekeza ndi carbon structural steel, Q345A ili ndi ubwino wa mphamvu zambiri, ntchito yabwino yokwanira, moyo wautali wautumiki, ntchito zosiyanasiyana komanso zachuma.Amagwiritsidwa ntchito kwambiri m'milatho, zombo, ma boilers, magalimoto ndi zomangamanga zofunika kwambiri.