Ko ehea te Koreeke he kowiri tira ngongo porowhita?

Kowiri tira ngongo kowiri tira ,304 316 316L 304L he kowiri tira o Grade ,Stainless ngongo pōkai kowiri he rota o Grade ,304304l 304H 316 316L 2205 310S 904L ect Grade ,304 me te 316L ngongo kowiri tira i roto i te kowiri putorino Grade. he kōeke noa.Ko te 304 me te 316 he parenga waikura me te parenga pāmahana teitei.