904L ƙarfe ne mai ƙarancin carbon mai yawan austenitic wanda ba shi da ƙarfi. Ƙara jan ƙarfe a cikin wannan matakin yana ba shi ingantaccen juriya ga acid mai ƙarfi, musamman sulfuric acid. Hakanan yana da matuƙar juriya ga harin chloride - duka tsatsa / tsatsa mai rauni da tsatsa mai ƙarfi.
Wannan matakin ba shi da magnesit a kowane yanayi kuma yana da kyakkyawan sauƙin haɗawa da kuma tsari. Tsarin austenitic kuma yana ba wannan matakin tauri mai kyau, har ma da yanayin zafi mai zafi.
904L yana da sinadarai masu tsada sosai kamar nickel da molybdenum. Yawancin aikace-aikacen da wannan matakin ya yi kyau a baya ana iya cika su da ƙarancin farashi ta amfani da ƙarfe mai ƙarfe duplex 2205 (S31803 ko S32205), don haka ba a amfani da shi sosai kamar yadda yake a da.
Maɓallan Kadarorin
An ƙayyade waɗannan kaddarorin don samfurin da aka yi birgima (faranti, takarda da coil) a cikin ASTM B625. An ƙayyade irin waɗannan kaddarorin amma ba lallai bane iri ɗaya ga wasu samfura kamar bututu, bututu da sanduna a cikin ƙayyadaddun ƙayyadaddun su.
Tsarin aiki
Tebur 1.Kayan aiki ya ƙunshi ƙarfe mai nauyin lita 904 na bakin ƙarfe.
| Matsayi | C | Mn | Si | P | S | Cr | Mo | Ni | Cu | |
| 904L | minti. matsakaicin | - 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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Kayayyakin Inji
Tebur na 2.Kayan aikin injiniya na ƙarfe masu nauyin 904L.
| Matsayi | Ƙarfin Tashin Hankali (MPa) min | Ƙarfin Yawa: 0.2% Shaida (MPa) min | Ƙarawa (% a cikin 50mm) minti | Tauri | |
| Rockwell B (HRB) | Brinell (HB) | ||||
| 904L | 490 | 220 | 35 | 70-90 na yau da kullun | - |
| Matsakaicin ƙimar taurin Rockwell abu ne na yau da kullun; sauran ƙimomin iyaka ne da aka ƙayyade. | |||||
Sifofin Jiki
Tebur na 3.Abubuwan da aka saba amfani da su na ƙarfe masu nauyin 904L.
| Matsayi | Yawan yawa | Modulus mai laushi | Matsakaicin Haɗin Faɗaɗar Zafi (µm/m/°C) | Tsarin kwararar zafi | Zafi na Musamman 0-100°C | Resistance na Lantarki | |||
| 0-100°C | 0-315°C | 0-538°C | A 20°C | A 500°C | |||||
| 904L | 8000 | 200 | 15 | - | - | 13 | - | 500 | 850 |
Kwatanta Bayanin Maki
Tebur na 4.Takamaiman ƙayyadaddun bayanai na ƙarfe masu nauyin 904L.
| Matsayi | Lambar UNS | Tsohon ɗan Birtaniya | Euronorm | SS na Sweden | JIS na Japan | ||
| BS | En | No | Suna | ||||
| 904L | N08904 | 904S13 | - | 1.4539 | X1NiCrMoCuN25-20-5 | 2562 | - |
| Waɗannan kwatancen kusan ne kawai. An yi nufin jerin ne a matsayin kwatanta kayan aiki masu kama da juna.baa matsayin jadawalin daidaiton kwangila. Idan ana buƙatar daidaiton daidai dole ne a duba ainihin ƙayyadaddun bayanai. | |||||||
Maki Mai Sauƙi na Madadin
Tebur na 5.Za a iya amfani da madaidaitan madaidaitan maki don ƙarfe 904L na bakin ƙarfe.
| Matsayi | Me yasa za a iya zaɓar shi maimakon 904L |
| 316L | Madadin ƙarancin farashi, amma tare da ƙarancin juriya ga tsatsa. |
| Makonni 6 | Ana buƙatar juriya mai ƙarfi ga ramuka da kuma tsatsa a cikin rami. |
| 2205 | Yana da irin wannan juriyar tsatsa, inda 2205 ke da ƙarfin injina mafi girma, kuma a farashi mai rahusa zuwa 904L. (2205 bai dace da yanayin zafi sama da 300°C ba.) |
| Babban duplex | Ana buƙatar ƙarin juriya ga tsatsa, tare da ƙarfi mafi girma fiye da 904L. |
Juriyar Tsatsa
Duk da cewa an ƙirƙira shi ne saboda juriyarsa ga sinadarin sulfuric acid, amma kuma yana da juriya sosai ga yanayi daban-daban. A PRE na 35 yana nuna cewa kayan yana da juriya mai kyau ga ruwan teku mai dumi da sauran muhallin da ke ɗauke da sinadarin chloride. Babban sinadarin nickel yana haifar da juriya mafi kyau ga tsatsagewar tsatsa fiye da daidaitattun matakan austenitic. Tagulla yana ƙara juriya ga sinadarin sulfuric da sauran acid masu rage ƙarfi, musamman a cikin kewayon "tsakiyar yawan abu".
A mafi yawan wurare, 904L yana da matsakaicin aikin tsatsa tsakanin daidaitaccen matakin austenitic 316L da kuma 6% molybdenum mai haɗakar sinadarai da makamantansu.
A cikin sinadarin nitric acid mai ƙarfi, 904L ba shi da juriya fiye da ma'aunin da ba shi da molybdenum kamar 304L da 310L.
Don matsakaicin juriya ga tsatsa a cikin mawuyacin yanayi, ya kamata a yi maganin ƙarfe bayan aikin sanyi.
Juriyar Zafi
Kyakkyawan juriya ga iskar shaka, amma kamar sauran nau'ikan da aka haɗa sosai yana fama da rashin kwanciyar hankali na tsarin (zubar da ruwa mai ƙarfi kamar sigma) a yanayin zafi mai yawa. Bai kamata a yi amfani da 904L sama da kusan 400°C ba.
Maganin Zafi
Maganin Magani (Annealing) - zafi zuwa 1090-1175°C kuma ya yi sanyi da sauri. Ba za a iya taurare wannan matakin ta hanyar maganin zafi ba.
Walda
Ana iya haɗa 904L cikin nasara ta kowace hanya ta yau da kullun. Ya kamata a yi taka tsantsan domin wannan matakin yana ƙarfafa austenitic gaba ɗaya, don haka yana iya kamuwa da fashewar zafi, musamman a cikin walda mai ƙarfi. Bai kamata a yi amfani da zafin da aka riga aka yi ba kuma a mafi yawan lokuta ba a buƙatar maganin zafi bayan walda ba. AS 1554.6 ya riga ya cancanta sandunan Grade 904L da electrodes don walda na 904L.
Ƙirƙira
904L tsantsar sa ce mai ƙarfi, kuma ba ta da sinadarin sulfur sosai, don haka ba za ta yi aiki yadda ya kamata ba. Duk da haka, ana iya amfani da fasahar da aka saba amfani da ita wajen kera injin.
Ana yin lanƙwasawa zuwa ƙaramin radius cikin sauƙi. A mafi yawan lokuta ana yin hakan a sanyi. Ba a buƙatar a yi amfani da shi a gaba ba, kodayake ya kamata a yi la'akari da shi idan ana son a yi amfani da ƙera shi a cikin yanayi inda ake tsammanin tsagewa mai tsanani.
Aikace-aikace
Aikace-aikace na yau da kullun sun haɗa da:
• Masana'antar sarrafa sinadarin sulfuric, phosphoric da acetic acid
• Sarrafa tarkace da takarda
• Abubuwan da ke cikin masana'antun goge iskar gas
• Kayan aikin sanyaya ruwan teku
• Abubuwan da ke cikin matatar mai
• Wayoyi a cikin na'urorin haska wutar lantarki
