1.Tool uʻamea o se ituaiga uʻamea uʻamea fuafuaina e faʻaaogaina mo le tele o meafaigaluega ma masini masini.O lona tuufaatasiga ua mamanuina e maua ai se tuufaatasiga o le maaa, malosi, ma le ofuina o le tetee.O u'amea meafaigaluega e masani ona iai le maualuga o le carbon (0.5% i le 1.5%) ma isi elemene fa'afefiloi e pei o le chromium, tungsten, molybdenum, vanadium, ma le manganese.Faʻalagolago i le faʻaogaina, e mafai foi e uʻamea meafaigaluega ona aofia ai le tele o isi elemene, e pei o le nickel, cobalt, ma le silicon.
2. O le tuʻufaʻatasiga faʻapitoa o elemene faʻaogaina e faʻaaogaina e fatu ai se meafaigaluega uamea o le a eseese e faʻatatau i mea manaʻomia ma le faʻaogaina.O u'amea e masani ona fa'aaogaina e fa'avasegaina o u'amea maualuga, u'amea malulu, ma u'amea vevela."