A fannin injiniyan gine-gine da gini, zabar kayan da suka dace shine mafi mahimmanci don tabbatar da aminci, tsawon rai, da kuma inganci a farashi.EN10210yana ƙayyade yanayin isar da fasaha don tsarin da aka gama da zafisassan da ba su da ramiAn yi su da ƙarfe marasa ƙarfe da kuma ƙarfe mai kyau. Daga cikin mafi yawan maki da aka ƙayyade akwai S355J0H da S355J2H. Duk da cewa suna cikin iyali ɗaya kuma suna da halaye da yawa, fahimtar bambance-bambancen da ke tsakaninsu yana da mahimmanci don zaɓar kayan aiki mafi kyau. Wannan labarin ya yi nazari kan halaye daban-daban, abubuwan da suka haɗa da sinadarai, ayyukan injiniya, da kuma aikace-aikacen da aka saba amfani da su na waɗannan nau'ikan ƙarfe guda biyu.

1. Fahimtar Matsayin Karfe

Tsarin tantancewa da kansa yana ba da alamun farko game da asalinsu da manufarsu. A cewar EN 10027-1, an rarraba sunayen kamar haka:

S: Yana nufin "Structural Steel."

355: Yana nuna ƙarancin ƙarfin yawan amfanin ƙasa (a cikin megapascals, MPa) don kauri har zuwa mm 16. Wannan babban kamanceceniya ne tsakanin maki biyu.

J0 / J2: Wannan ɓangaren yana nuna ƙarfin tasirin da ake buƙata. "J0" yana nufin kayan dole ne su cimma ƙaramin ƙarfin tasiri na Joules 27 a 0°C. "J2" yana ba da umarnin ƙaramin ƙarfin tasiri na Joules 27, amma a ƙaramin zafin jiki na -20°C.

H: Yana nufin "Sassan da ba su da rami," musamman waɗanda aka gama su da zafi, kamar yadda aka bayyana a cikin ma'aunin EN10210.

2. Sinadaran da ke cikin sinadarai: Ƙananan bambance-bambance masu tasiri mai mahimmanci

Dukansu S355J0H da S355J2H ƙarfe ne masu ɗauke da manganese waɗanda aka san su da kyawun iyawar walda. Bukatun sinadaran da EN10210 ke buƙata suna da kama sosai, amma akwai bambance-bambance masu mahimmanci a cikin iyakokin da aka yarda da su don sulfur (S), phosphorus (P), da kuma aikin deoxidation, waɗanda ke shafar tsabtar ƙarfe da aikin ƙarancin zafin jiki kai tsaye.

Sinadarin Sinadarai	S355J0H (Matsakaicin % na matsakaicin)	S355J2H (Matsakaicin % na matsakaicin)	Ma'anar Bambanci
Carbon (C)	≤ 0.22	≤ 0.22	Kama da haka; yana tabbatar da ƙarfi mai kyau da kuma sauƙin walda.
Manganese (Mn)	≤ 1.60	≤ 1.60	Kama da haka; yana taimakawa wajen ƙarfi.
Silikon (Si)	≤ 0.55	≤ 0.55	Kama da haka; yana aiki a matsayin deoxidizer.
Phosphorus (P)	≤ 0.035	≤ 0.030	J2H yana da iyaka mai tsauri, yana rage karyewar ƙarfi.
Sulfur (S)	≤ 0.035	≤ 0.030	J2H yana da iyaka mai tsauri, yana inganta tsafta da tauri.
Nitrogen (N)	≤ 0.009	-	J2H yawanci ana kashe shi gaba ɗaya (an yi masa magani da hatsi mai kyau), wanda hakan ke hana buƙatar ƙimar N mafi girma.

Babban abin da za a yi la'akari da shi shi ne cewa S355J2H yana buƙatar tsauraran matakan sarrafa ƙazanta kamar phosphorus da sulfur. Wannan yana haifar da ƙarfe mai tsabta tare da ƙaramin tsari iri ɗaya, wanda yake da mahimmanci don cimma ingantaccen tauri a yanayin zafi ƙasa da sifili. Bugu da ƙari, an rarraba S355J2H a matsayin ƙarfe "FF" (An kashe shi gaba ɗaya), ma'ana ana yi masa magani da abubuwa kamar aluminum don ƙirƙirar tsarin hatsi mai kyau, wanda a zahiri yana inganta tauri. S355J0H gabaɗaya "FN" ne (ba a yarda da ƙarfen Rimming ba), wanda ba shi da tsauri.

3. Halayen Inji: Bambancin da ke Tsakanin Tauri da Tauri

Kamar yadda aka nuna a matsayin maki, halayen injina, musamman ƙarfin amfani da juriya, kusan iri ɗaya ne ga dukkan maki. Bambancin da ke bayyana shine aikinsu a ƙarƙashin nauyin tasiri a yanayin zafi daban-daban.

Kadarar Inji	S355J0H	S355J2H
Ƙarfin Ba da Lamuni (ReH)	≥ 355 MPa (t ≤ 16mm)	≥ 355 MPa (t ≤ 16mm)
Ƙarfin Taurin Kai (Rm)	470 - 630 MPa (t ≤ 3mm)	470 - 630 MPa (t ≤ 3mm)
Tsawaita (A)	≥ 22% (na tsawon lokaci)	≥ 22% (na tsawon lokaci)
Makamashin Tasiri (KV)	≥ 27 J @ 0°C	≥ 27 J @ -20°C

Wannan bambanci a zafin gwajin tasiri shine abu mafi mahimmanci wajen zaɓar tsakanin su biyun. Duk da cewa S355J0H yana da ƙarfi sosai ga yawancin aikace-aikacen waje na ciki da na waje, an ƙera S355J2H don tsayayya da karyewar karyewa a cikin yanayi mai sanyi.

4. Aikace-aikace da Sharuɗɗan Zaɓe

Zaɓin tsakanin S355J0H da S355J2H galibi yana faruwa ne ta hanyar mafi ƙarancin zafin aiki na tsarin da kuma mahimmancin amfani da shi.

S355J0H: Zaɓin Mai Inganci Mai Inganci ga Yanayi Mai Zafi

Amfani na yau da kullun: Gine-gine na gabaɗaya, filayen wasa, dandamali, da kayan aikin injiniya a yankuna masu yanayi mai sauƙi ko mai zafi inda yanayin zafi ba kasafai yake sauka ƙasa da 0°C ba.

Riba: Yana ba da ƙarfi da sauƙin walda a farashi mai rahusa fiye da takwarorinsa na J2, wanda hakan ya sa ya zama zaɓi mai araha ga ayyukan da ba su da tasiri ga ƙarancin zafin jiki.

S355J2H: Zaɓin Tsaro ga Muhalli Masu Bukatar Sanyi da Kuma Masu Yawa

Amfani na Musamman: Gine-gine na ƙasashen waje, gadoji a yankunan tsaunuka ko arewa, wuraren adana sanyi, hasumiyoyin iska, da duk wani abu mai tsari wanda ke ƙarƙashin lodi mai ƙarfi a yanayin zafi mai ƙarancin zafi.

Riba: Tabbacin tasirinsa a -20°C yana ba da babban gibin aminci ga karyewar da ta yi rauni a yanayin sanyi. Tsarin hatsi mai kyau kuma yana ba da gudummawa kaɗan ga ingantaccen yanayin walda da kauri.

Kammalawa

A taƙaice, duka biyunEN10210 S355J0Hda S355J2H ƙarfe ne masu inganci, waɗanda aka gama da zafi, waɗanda ke ba da mafi ƙarancin ƙarfin samarwa na 355 MPa. Suna da irin wannan tushen sinadarai da buƙatun ƙarfi iri ɗaya da ƙarfi iri ɗaya. Duk da haka, ba za a iya musanya su a kowane yanayi ba. S355J2H ya bambanta kansa ta hanyar sarrafa ƙazanta (P & S) da tsarin hatsi mai cikakken ƙarfi, wanda ke tabbatar da ƙarancin tauri na Joules 27 a -20°C, idan aka kwatanta da Joules 27 na S355J0H a 0°C. Ga ayyukan da ke cikin yanayi mai sanyi ko waɗanda ke buƙatar babban gefen aminci daga karyewar ƙarfe, S355J2H shine zaɓi mai mahimmanci, kodayake ya ɗan fi tsada. Don aikace-aikacen gabaɗaya a yankuna masu zafi, S355J0H ya kasance zaɓi mai aminci kuma mai araha.