ʻO 904L he kila haʻahaʻa haʻahaʻa haʻahaʻa kiʻekiʻe i hoʻopaʻa ʻole ʻia ʻo austenitic stainless steel.ʻO ka hoʻohui ʻana o ke keleawe i kēia papa e hoʻomaikaʻi maikaʻi ʻia ke kūʻē ʻana i nā ʻakika hoʻemi ikaika, ʻoi aku ka sulfuric acid.He kūpaʻa loa ia i ka hoʻouka ʻana o ka chloride - ʻelua lua / crevice corrosion a me stress corrosion crack.
ʻAʻole magnetic kēia papa ma nā kūlana āpau a he maikaʻi loa ka weldability a me ka formability.Hāʻawi ke ʻano austenitic i kēia ʻano paʻakikī maikaʻi loa, a hiki i nā mahana cryogenic.
Loaʻa iā 904L nā mea waiwai nui o nā mea waiwai nui o ka nickel a me ka molybdenum.Hiki ke hoʻokō maikaʻi ʻia ka nui o nā noi i hana maikaʻi ʻia i kēia papa ma ke kumu kūʻai haʻahaʻa e ka duplex stainless steel 2205 (S31803 a i ʻole S32205), no laila ua liʻiliʻi ka hoʻohana ʻana ma mua o ka wā ma mua.
Na Waiwai Ki
Kuhi ʻia kēia mau waiwai no ka huahana ʻōwili palahalaha (palapala, pepa a me ka coil) ma ASTM B625.Ua kuhikuhi ʻia nā waiwai like akā ʻaʻole like no nā huahana ʻē aʻe e like me ka paipu, ka paipu a me ka bar i kā lākou mau kikoʻī.
Huina
Papa 1.Nā papa hana no ka 904L o nā kila kila.
| Papa | C | Mn | Si | P | S | Cr | Mo | Ni | Cu | |
| 904L | min. max. | - 0.020 | - 2.00 | - 1.00 | - 0.045 | - 0.035 | 19.0 23.0 | 4.0 5.0 | 23.0 28.0 | 1.0 2.0 |
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Na Waiwai Mechanical
Papa 2.Mechanical waiwai o 904L grade stainless steel.
| Papa | Ka U'i (MPa) min | ʻO ka ikaika 0.2% Hōʻoia (MPa) min | Elongation (% ma 50mm) min | ʻoʻoleʻa | |
| Rockwell B (HR B) | Brinell (HB) | ||||
| 904L | 490 | 220 | 35 | 70-90 maʻamau | - |
| ʻO ka laulā waiwai o Rockwell Hardness he maʻamau wale nō;ʻO nā waiwai ʻē aʻe nā palena i kuhikuhi ʻia. | |||||
Na Waiwai Kino
Papa 3.Nā waiwai kino maʻamau no nā kila kila kila 904L.
| Papa | ʻO ka mānoanoa | Elastic Modulus | Mean Co-eff of Thermal Expansion (µm/m/°C) | ʻO ka hoʻoili wela | Wela Kūikawā 0-100°C | Kū'ē Elec | |||
| 0-100°C | 0-315°C | 0-538°C | Ma ka 20°C | Ma 500°C | |||||
| 904L | 8000 | 200 | 15 | - | - | 13 | - | 500 | 850 |
Hoʻohālikelike Hoʻohālikelike Papa
Papa 4.Nā kikoʻī kikoʻī no nā kila kila kila 904L.
| Papa | UNS No | Pelekane kahiko | Euronorm | Kuekene SS | Kepani JIS | ||
| BS | En | No | inoa | ||||
| 904L | N08904 | 904S13 | - | 1.4539 | X1NiCrMoCuN25-20-5 | 2562 | - |
| Aneane wale keia mau hoohalike ana.Hoʻohālikelike ʻia ka papa inoa o nā mea hana likeʻaʻolema ke ʻano he papa hoʻonohonoho o nā mea like aelike.Inā makemake ʻia nā mea like pono e nīnau ʻia nā kikoʻī kumu. | |||||||
Nā Papa ʻē aʻe
Papa 5.Loaʻa nā māka ʻokoʻa i ka 904L kila kila.
| Papa | No ke aha e koho ʻia ai ma kahi o 904L |
| 316L | ʻO kahi ʻokoʻa haʻahaʻa haʻahaʻa, akā me ka pale ʻana i ka corrosion haʻahaʻa loa. |
| 6Mo | Pono ke kūpa'a ki'eki'e i ka lua a me ka crevice corrosion. |
| 2205 | ʻO kahi kūpaʻa corrosion like loa, me ka 2205 i ʻoi aku ka ikaika mechanical, a ma ke kumu kūʻai haʻahaʻa i 904L.(ʻAʻole kūpono ka 2205 no nā mahana ma luna o 300°C.) |
| duplex nui | Pono ka pale ʻana i ka corrosion, me ka ikaika kiʻekiʻe ma mua o 904L. |
Pale ʻino
ʻOiai i hoʻomohala mua ʻia no kona kūʻē ʻana i ka waikawa sulfuric he kūʻē kiʻekiʻe loa ia i kahi ākea o nā kaiapuni.ʻO ka PRE o 35 e hōʻike ana he kūpaʻa maikaʻi ka mea i ka wai kai mahana a me nā wahi chloride kiʻekiʻe.Loaʻa ka ʻike nickel kiʻekiʻe i kahi kūʻē ʻoi aku ka maikaʻi i ka pohā o ka corrosion ma mua o nā māka austenitic maʻamau.Hoʻohui ke keleawe i ke kūʻē ʻana i ka sulfuric a me nā ʻakika hoʻohaʻahaʻa ʻē aʻe, ʻoi aku ka nui o ka "mid concentration".
Ma ka hapanui o nā kaiapuni, loaʻa iā 904L kahi hana corrosion ma waena o ka papa austenitic maʻamau 316L a me ka 6% molybdenum i hui pū ʻia a me nā māka "super austenitic" like.
I loko o ka ʻakika nitric ikaika ʻo 904L ʻoi aku ka liʻiliʻi o ke kūpaʻa ma mua o nā māka molybdenum-free e like me 304L a me 310L.
No ke koʻikoʻi o ke koʻikoʻi o ke koʻikoʻi o ka pohā ʻana i ka pōʻai ma nā wahi koʻikoʻi, pono e mālama ʻia ke kila ma hope o ka hana anu.
Kū'ē wela
ʻO ke kūpaʻa maikaʻi i ka oxidation, akā e like me nā māka i hoʻohuihui nui ʻia e loaʻa i ka paʻa ʻole o ke kūkulu ʻana (ka ua o nā māhele brittle e like me ka sigma) i nā wela kiʻekiʻe.ʻAʻole pono e hoʻohana ʻia ka 904L ma luna o 400°C.
Hoʻomaʻamaʻa Wela
Hoʻoponopono Hoʻoponopono (Annealing) - wela i ka 1090-1175 ° C a maʻalili wikiwiki.ʻAʻole hiki ke hoʻopaʻakikī ʻia kēia papa me ka mālama wela.
wiliwili
Hiki ke hoʻopili maikaʻi ʻia ʻo 904L e nā ʻano maʻamau āpau.Pono e mālama ʻia i ka paʻa ʻana o kēia papa i ka austenitic piha, no laila hiki ke maʻa i ka pohā wela, ʻoi aku hoʻi i nā weld i kāohi ʻia.ʻAʻole pono e hoʻohana ʻia ka wela ma mua a ma ka hapanui o nā hihia ʻaʻole koi ʻia ka mālama wela ma hope o ka weld.AS 1554.6 pre-qualifies Grade 904L kookoo a me electrodes no ka welding o 904L.
Hana ʻia
ʻO 904L kahi maʻemaʻe kiʻekiʻe, haʻahaʻa sulfur grade, a no laila ʻaʻole maikaʻi ka mīkini.ʻOiai naʻe hiki ke hana ʻia ka papa me ka hoʻohana ʻana i nā ʻenehana maʻamau.
Hiki ke hoʻokō ʻia ke kulou ʻana i kahi radius liʻiliʻi.I ka hapanui o nā hihia, hana ʻia kēia ma ke anu.ʻAʻole koi ʻia ka hoʻopili ʻana ma hope, ʻoiai pono e noʻonoʻo ʻia inā e hoʻohana ʻia ka hana ʻana i kahi kaiapuni kahi i manaʻo ʻia ai nā kūlana pohā koʻikoʻi.
Nā noi
Loaʻa nā noi maʻamau:
• Hoʻoponopono mea kanu no ka sulfuric, phosphoric a me ka acetic acid
• Ka hana ʻana i ka pulp a me ka pepa
• Nā mea i loko o nā mea kanu holoi kinoea
• Mea hooluolu wai kai
• Nā mea hoʻoheheʻe aila
• Uea i loko o electrostatic precipitators