301 Full Hard ndi chitsulo chosapanga dzimbiri cha austenitic chomwe chimasiyana ndi mitundu ina ya 301 yoperekedwa ndi United Performance Metals chifukwa chazizira kwambiri mpaka kulimba kwake. … Mu zonse zovuta chikhalidwe, mtundu 301 ali wamakokedwe mphamvu ya 185,000 PSI osachepera, ndi osachepera zokolola mphamvu 140,000 PSI.