Nā ʻokoʻa ma waena o 316L a me 304 Stainless Steel

ʻelua316L a me 304he austenitic stainless steels i hoʻohana nui ʻia i ka ʻoihana, kūkulu, lāʻau lapaʻau, a me nā noi pili i ka meaʻai. Eia naʻe, ʻokoʻa nui lākou i kahoʻohui kemika, pale ʻana i ka corrosion, waiwai mechanical, a me nā noi.

1. Ka Hui Kemika

304 Ke kila kila: Ua haku mua ia18% chromium (Cr) a me 8% nikela (Ni), ʻo ia ke kumu i ʻike ʻia ai18-8 kila kila.

316L kila kila: Loaʻa16-18% chromium, 10-14% nickel, a he mea hou aku2-3% molybdenum (Mo), ka mea e hoʻonui ai i kona pale ʻana i ka corrosion.

ʻO ka“L” i 316Lkū nokalapona haʻahaʻa (≤0.03%), hoʻomaikaʻi i kona weldability a hōʻemi i ka pilikia o ka intergranular corrosion.

2. Ke kū'ē i ka corrosion

Loaʻa iā 304 ka pale ʻana i ka corrosion maikaʻi, kūpono no nā kaiapuni maʻamau a me ka ʻike ʻana i nā waikawa oxidizing.

Hāʻawi ʻo 316L i ka pale ʻana i ka corrosion, oi loa aku manā kaiapuni piha i ka chloride(e like me ka wai kai a me nā lewa paʻakai), mahalo i ka molybdenum, e kōkua ana i ke kū'ēlua a me ka pohā.

3. Mea Mechanical & Mea Hana

ʻOi aku ka ikaika o 304, me ka paʻakikī haʻahaʻa, hiki ke maʻalahi i ka hana anu, ka piko, a me ka weld.

316L emi iki ka ikaika akā ʻoi aku ka ductile, me ka haʻahaʻa kalapona maʻiʻo e hoʻomaikaʻiweldability, i mea kūpono no nā noi kahi i hiki ʻole ai ka mālama wela post-weld.

4. Hoʻohālikelike Kūʻai

ʻOi aku ke kumukūʻai o 316L ma mua o 304, ma muli o kona kiʻekiʻe nickel a me ka molybdenum maʻiʻo, e hoʻonui ai i nā kumukūʻai hana.

5. Nā polokalamu kī

Ka hopena

Inā kāu noi ma kahipuni honua(e like me nā lako kīhini, nā mea kūkulu hale, a i ʻole nā ​​mea hana hale),ʻO 304 kahi koho maikaʻi loa. Eia naʻe, no kanā kaiapuni corrosive loa(e like me ka wai kai, ka hana kemika, a i ʻole nā ​​lāʻau lapaʻau) a i ʻolekahi e pono ai ka weldability, ʻO 316L ka koho maikaʻi loa.