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.
No nā noi pepa pepa e koi ai i nā helu alloy haʻahaʻa haʻahaʻa e pono ai e kū pono ana i ka paleʻana. Hoʻokumuʻia ma kahi o A 22% chromium i loaʻa, ua hui pū lākou i ka austentitic
Ua hoʻopiʻi nuiʻia ka mea huna S31803 Ke hōʻike nei kēia i ko lākou makemake e hoʻonui i nā waiwai o Alloy, mahalo i ka hoʻomohalaʻana o ke kaʻina hanaʻo AED Steelmange. Eia kekahi, hiki iā ia ke hoʻohālikelike i ka pae o ka nitrogen ma mua o keʻano he mea wale nō e like me keʻano o keʻano hope. No laila,ʻo nā mea hana kiʻekiʻe eʻimi nei eʻimi e hoʻonui i nāʻike o Chromium (CR), molybdenum (mo) a me nitrogen (n).