Umbhobho we-Q345 ongenamthungo uphantsi kwe-alloy series - i-alloy ephantsi yamandla aphezulu ensimbi yesakhiwo (GB / t1591-1994).I-Q345A, B, C, D kunye no-E ngamabakala amele olu hlobo lwensimbi.Xa kuthelekiswa nentsimbi ye-carbon structural, i-Q345A ineenzuzo zamandla aphezulu, ukusebenza kakuhle okubanzi, ubomi benkonzo ende, uluhlu olubanzi lwezicelo kunye noqoqosho oluncinci.Isetyenziswe ngokubanzi kwiibhulorho, iinqanawa, iibhoyili, izithuthi kunye nezakhiwo ezibalulekileyo zokwakha.