A maeʻa le faʻamaʻiina ma le faʻafefeteina o le faʻaogaina o paipa, o vaega o loʻo gaosia o loʻo i ai le lelei atoatoa o mea faʻainisinia ma e faʻaaogaina lautele i vaega taua faʻavae, aemaise lava i latou e fesoʻotaʻi ai, bolts, gears ma shafts o loʻo galue i lalo o le fesuiaiga o avega. Ae o le maaa i luga e maualalo ma e le mafai ona ofuina. Tempering + surface quenching e mafai ona faʻaaogaina e faʻaleleia ai le maaa o luga o vaega.

O lona vailaʻau vailaʻau o loʻo i ai carbon (C) anotusi o 0.42 ~ 0.50%, Si anotusi o 0.17 ~ 0.37%, Mn anotusi o 0.50 ~ 0.80%, ma Cr anotusi <= 0.25%.
Fautuaina le vevela vevela vevela: faʻasalaina 850 ° C, tineia 840 ° C, faʻafefe 600 ° C.

O paipa u'amea masani masani e masani ona faia i le maualuga o le carbon structural steel, e le faigata tele ma faigofie ona tipi. E masani ona faʻaaogaina i limu e fai ai faʻataʻitaʻiga, fautuaga, pou taʻiala, ma isi, ae manaʻomia le vevela.

1. A maeʻa ona faʻamalo ma aʻo leʻi faʻafefe, o le maaa o le sila e sili atu nai lo le HRC55, lea e agavaa.
O le maaa sili ona maualuga mo le faʻaaogaina o le HRC55 (televave tineia HRC58).

2. Aua le faʻaogaina le faʻaogaina o le vevela o le faʻaogaina o le carburizing ma le tineia mo le sila.
A maeʻa ona faʻamalo ma faʻafefe, o vaega e iai mea faʻainisinia lelei lelei ma e faʻaaogaina lautele i vaega taua faʻavae, aemaise lava i latou e fesoʻotaʻi ai, faʻamau, mea faʻaoga ma uʻamea o loʻo galue i lalo o le fesuiaiga o avega. Ae o le maaa i luga e maualalo ma e le mafai ona ofuina. Tempering + surface quenching e mafai ona faʻaaogaina e faʻaleleia ai le maaa o luga o vaega.

Carburizing togafitiga e masani ona faʻaaogaina mo vaega mamafa-tiute faʻatasi ma le faʻaofuofu luga ma le aʻafiaga-teteʻe autu, ma o lona ofuina teteʻe e maualuga atu nai lo le tineia ma le faʻafefe + faʻafefe. O le carbon content i luga o le fogaeleele o le 0.8-1.2%, ma o le autu e masani lava 0.1-0.25% (0.35% faʻaaogaina i mataupu faʻapitoa). A maeʻa togafitiga vevela, e mafai ona maua le maualuga o le maaa (HRC58-62), ma e maualalo le maaa ma le aʻafiaga o le aʻa.