S31803ʻo ia ka helu helu helu i hoʻopaʻaʻia Ua hanaʻia ka'ōnaehana URT i hanaʻia e nā hui kālepa lehulehu i nā makahiki 1970 e hōʻemi i ka hilahila i keʻano like me keʻano likeʻole Hōʻikeʻia kēlā me kēia metala e ka leka i ukaliʻia e nā heluʻelima, kahi e hōʻike ai i ka leka ma Metal Series, I.E. S no ka kila kila.
ʻO ke kumu o ka hoʻomaʻamaʻa hoʻomākaukauʻana e hoʻomaikaʻi ai i keʻano o ka hanaʻana, e hoʻopau i ke kaumaha kūloko a hoʻomākaukau i kahiʻano maikaʻi maikaʻi no ka hana wela wela. ʻO ke kaʻina hana hana wela e pili ana i ka hoʻonāukiukiʻana, ka hana maʻamau, ka wā kahiko,ʻo ka huhū a me ka huhū, etc.
Sae 304ʻO Steels Steel ka mea kila maʻamau maʻamau. ʻO ka kila he chromiumʻelua (ma waena o 18% a 20%) a me Nickel (ma waena o 8% a me 10. 1] medial. He kila kila austevitic. Ua emi iki i ka uila a me ka nānāʻole ma mua o ka kila carbon. ʻO ia ka magnetic, akāʻoi aku ka liʻiliʻi ma mua o ke kila. Loaʻa iā ia kahi kuʻekuʻe kiʻekiʻe ma mua o ke kila maʻamau a ua hoʻohana nuiʻia ma muli o ka maʻalahi ma nāʻano likeʻole. [1]