1: Iimpawu zegrisi esiyizalisayo (ezifana ne-ExxonMobil kunye neShell) kunye nomthamo wokuzalisa zichanekile. Sisebenzise ubuchwepheshe bokulinganisa kunye nokufaka igrisi ngokuchanekileyo (ukuthintela ukufakwa kwegrisi ngendlela engalinganiyo kunye nokuveliswa kobushushu)
2: Unyango lobushushu kunye nokuguqulwa komphezulu (ukumisela ukumelana nokuguguleka), ubulukhuni kunye nobunzulu bomaleko oqinileyo
Iinkqubo zonyango lobushushu (ezifana nokucima i-martensitic kunye ne-bainitic) ziqinisekisa ubulukhuni obufanayo (HRC 61-65) kunye nomaleko oqinileyo onzulu osebenzayo. Uzinzo lobukhulu. Kwiimeko zokusebenza ezinobushushu obuphezulu (ezifana neesilinda zokomisa kunye neemoto), senze unyango olukhethekileyo lokuzinzisa. Ubungakanani beebheringi abuyi kutshintsha kakhulu kumaqondo obushushu aphezulu, nto leyo ethintela ukubanjwa.