Āe, koinei te hanga o ngā taputapu tēpu he kowiri tira.

Ko te tukanga hanga o te maripi, te marau me te pūnu iti he mea hanga mai i te kowiri tira mō te tina, he maha ngā tukanga uaua pēnei i te tā, te whakarewa me te huri.

Ka taea te wehewehe i ngā taputapu tēpu o te whare he kowiri tira kia 201, 430, 304 (18-8) me te 18-10.

430 te kowiri tira:
Mā te rino me te neke atu i te 12% o te chromium ka taea te ārai i te waikura i puta mai i ngā āhuatanga taiao. Ka kiia ko te maitai kore waikura. I roto i te JIS, ko te ingoa waehere 430, nō reira ka kiia hoki ko te maitai kore waikura 430. Heoi, kāore e taea e te maitai kore waikura 430 te ātete i te waikura i puta mai i ngā matū i te hau. Kāore te maitai kore waikura 430 e whakamahia pinepinetia mō tētahi wā, engari ka waikura tonu (ka waikura) nā ngā āhuatanga taiao.

18-8 kowiri tira:
Ka taea e te rino + 18% chromium + 8% nickel te ātete i te waikura matū. Ko tēnei maitai kore waikura te nama 304 i roto i te waehere JIS, nō reira e kiia ana hoki ko te maitai kore waikura 304.

18-10 kowiri tira:
Heoi, kei te piki haere te maha o ngā matū kei roto i te rangi, ā, ka waikura anō hoki te 304 i ētahi wāhi tino poke; Nō reira, ko ētahi hua kounga teitei ka hangaia ki te 10% nikara kia pakari ake ai, kia ātete ai hoki ki te waikura. Ka kiia tēnei momo kowiri tira he kowiri tira 18-10. I roto i ētahi tohutohu mō ngā taputapu kai, he kīwaha e rite ana ki te "whakamahi i te kowiri tira hauora tino matatau 18-10".

E ai ki te tātaritanga o te pokapū rangahau raraunga, ka taea te wehewehe i te maitai kore waikura kia toru ngā wāhanga: te maitai kore waikura austenitic, te maitai kore waikura ferritic me te maitai kore waikura martensitic. Ko ngā wāhanga matua o te maitai kore waikura ko te rino, te chromium me te nickel conduits. Hei tāpiri, kei roto hoki ngā huānga iti pēnei i te manganese, te titanium, te cobalt, te molybdenum me te cadmium, e hanga ana i te mahi a te maitai kore waikura kia pumau, ā, he ātete ki te waikura me te waikura. Kāore te maitai kore waikura austenitic e ngāwari ki te aukume nā te āhua motuhake o te hanganga ngota o roto.