Emkhakheni wobunjiniyela bezakhiwo nokwakha, ukukhetha izinto ezifanele kubaluleke kakhulu ekuqinisekiseni ukuphepha, isikhathi eside, kanye nokusebenza kahle kwezindleko. Indinganiso yaseYurophuEN10210icacisa izimo zokulethwa kobuchwepheshe zesakhiwo esiqediwe ngokushisaizingxenye ezingenaluthozenziwe ngezinsimbi zesakhiwo ezingezona i-alloy kanye nezinsimbi ezicolekile. Phakathi kwamabanga avame ukucaciswa yi-S355J0H kanye ne-S355J2H. Nakuba zingabomndeni ofanayo futhi zabelana ngezici eziningi, ukuqonda umehluko wazo ohlukile kubalulekile ekukhetheni izinto ezifanele. Lesi sihloko sihlola izakhiwo ezihlukile, ukwakheka kwamakhemikhali, ukusebenza kwemishini, kanye nokusetshenziswa okuvamile kwalawa mabanga amabili ensimbi.

1. Ukuchaza Ukuqokwa Kwebanga Lensimbi

Uhlelo lokuqamba amagama ngokwalo lunikeza izinkomba zokuqala zobunikazi babo kanye nenhloso yabo. Ngokusho kwe-EN 10027-1, amagama ahlukaniswe kanje:

S: Imele "Insimbi Yokwakheka."

355: Ibonisa amandla amancane okukhiqiza (kuma-megapascals, i-MPa) ngobukhulu obufika ku-16 mm. Lokhu kufana okuyinhloko phakathi kwamazinga amabili.

J0 / J2: Le ngxenye isho ukuqina komthelela okudingekayo. "J0" isho ukuthi into kumele ifinyelele amandla omthelela amancane angama-Joules angu-27 ku-0°C. "J2" ifuna amandla omthelela amancane afanayo angama-Joules angu-27, kodwa ekushiseni okuphansi okungu--20°C.

H: Kusho "Izingxenye Ezingenalutho," ikakhulukazi lezo eziqediwe kahle, njengoba kuchazwe yi-EN10210 standard.

2. Ukwakheka Kwamakhemikhali: Izinguquko Ezincane Ezinomthelela Obalulekile

Zombili i-S355J0H kanye ne-S355J2H ziyizinsimbi zesakhiwo eziqukethe i-manganese ezaziwa ngokushibilika kwazo okuhle. Izidingo zokwakheka kwamakhemikhali ngokwe-EN10210 ziyafana kakhulu, kodwa umehluko obalulekile ukhona emikhawulweni evumelekile yesulfure (S), i-phosphorus (P), kanye nomkhuba wokususa i-oxidation, okuthinta ngqo ukuhlanzeka kwensimbi kanye nokusebenza kwayo kwezinga lokushisa eliphansi.

I-Chemical Element	S355J0H (Isilinganiso esiphezulu esijwayelekile)	I-S355J2H (Isilinganiso esiphezulu esijwayelekile)	Umphumela Womehluko
Ikhabhoni (C)	≤ 0.22	≤ 0.22	Kufana; kuqinisekisa ukuqina okuhle kanye nokushibilika.
I-Manganese (Mn)	≤ 1.60	≤ 1.60	Kufana; kunegalelo ekuqiniseni.
I-Silicon (Si)	≤ 0.55	≤ 0.55	Kufana; kusebenza njenge-deoxidizer.
I-Phosphorus (P)	≤ 0.035	≤ 0.030	I-J2H inomkhawulo oqinile, onciphisa ukuqhekeka.
I-Sulfur (S)	≤ 0.035	≤ 0.030	I-J2H inomkhawulo oqinile, othuthukisa ukuhlanzeka nokuqina.
I-nitrogen (N)	≤ 0.009	-	I-J2H ivame ukubulawa ngokuphelele (iphathwa ngokusanhlamvu okuhle), okususa isidingo senani eliphezulu le-N.

Okubalulekile ukuthi i-S355J2H idinga ukulawulwa okuqinile kokungcola okufana ne-phosphorus ne-sulfur. Lokhu kuphumela ensimbini ehlanzekile enesakhiwo esincane esifanayo, esibalulekile ekufinyeleleni ukuqina okuthembekile emazingeni okushisa angaphansi kwezinga-zero. Ngaphezu kwalokho, i-S355J2H ihlukaniswa njengensimbi "FF" (ebulawe ngokuphelele), okusho ukuthi iphathwa ngezinto ezifana ne-aluminium ukudala isakhiwo esinohlamvu olucolekile, esithuthukisa ukuqina ngokwemvelo. I-S355J0H ngokuvamile "i-FN" (insimbi yokubopha ayivunyelwe), engaqinile kangako.

3. Izakhiwo Zemishini: Umehluko Ocacile Ekuqineni

Njengoba ukubizwa kwebanga kubonisa, izakhiwo zomshini, ikakhulukazi amandla okukhiqiza kanye nokudonsa, ziyafana kakhulu kuzo zombili izinhlobo. Umehluko ochazayo ukusebenza kwazo ngaphansi komthwalo wokucindezela emazingeni okushisa ahlukene.

Impahla Yomshini	S355J0H	S355J2H
Amandla Okukhiqiza (ReH)	≥ 355 MPa (t ≤ 16mm)	≥ 355 MPa (t ≤ 16mm)
Amandla Okuqina (Rm)	470 - 630 MPa (t ≤ 3mm)	470 - 630 MPa (t ≤ 3mm)
Ukwelulwa (A)	≥ 22% (i-longitudinal)	≥ 22% (i-longitudinal)
Amandla Omthelela (KV)	≥ 27 J @ 0°C	≥ 27 J @ -20°C

Lo mehluko ekushiseni kokuhlolwa komthelela yisona sici esibaluleke kakhulu ekukhetheni phakathi kwalokhu okubili. Nakuba i-S355J0H iqinile ngokwanele ekusetshenzisweni okuningi kwangaphakathi nangaphandle okunesimo sezulu esipholile, i-S355J2H yenzelwe ukumelana nokuqhekeka okubuthakathaka ezindaweni ezibandayo.

4. Izicelo kanye Nezindlela Zokukhetha

Ukukhetha phakathi kwe-S355J0H ne-S355J2H kunqunywa kakhulu izinga lokushisa eliphansi kakhulu lesakhiwo kanye nokubaluleka kokusetshenziswa.

S355J0H: Ukukhetha Okungabizi Kakhulu Kwesimo Sezulu Esifudumele

Izicelo Ezijwayelekile: Ukwakhiwa kwezakhiwo ezijwayelekile, izinkundla zemidlalo, amapulatifomu, kanye nezingxenye zemishini ezindaweni ezinesimo sezulu esithambile noma esifudumele lapho amazinga okushisa engavamile, uma eke ehla khona, ngaphansi kuka-0°C.

Inzuzo: Inikeza amandla amahle kakhulu kanye nokushintshwa ngentengo ephansi ngokuvamile kune-J2, okwenza kube ukukhetha okungabizi kumaphrojekthi lapho umthelela wokushisa okuphansi ungeyona inkinga eyinhloko.

I-S355J2H: Ukukhetha Okuphephile Kwezindawo Ezidinga Ukuphepha Nezibandayo

Izicelo Ezijwayelekile: Izakhiwo zasogwini lolwandle, amabhuloho asezindaweni ezinezintaba noma ezisenyakatho, izindawo zokugcina izinto ezibandayo, imibhoshongo yomoya, nanoma yisiphi isakhiwo esingaphansi komthwalo oguquguqukayo ezimweni zokushisa eziphansi.

Inzuzo: Ukusebenza kwayo okuqinisekisiwe komthelela ku--20°C kunikeza isilinganiso esibalulekile sokuphepha ngokumelene nokuqhekeka okubhubhisayo kwezimila ezibandayo. Isakhiwo sezinhlamvu ezincane siphinde sibe negalelo elincane ekuthuthukiseni ukushibilika kanye nezakhiwo zokujiya.

Isiphetho

Ngamafuphi, kokubiliEN10210 S355J0Hkanye ne-S355J2H ziyizinsimbi zesakhiwo ezingenalutho ezisezingeni eliphezulu, eziqediwe ngokushisa ezinikeza amandla okukhiqiza okungenani angu-355 MPa. Zinesisekelo esifanayo samakhemikhali kanye nezidingo ezifanayo zamandla okudonsa nokukhiqiza. Kodwa-ke, azikwazi ukushintshaniswa kuzo zonke izimo. I-S355J2H iyazihlukanisa ngokulawula okuqinile kokungcola (P & S) kanye nesakhiwo esiphelele, esinohlamvu olucolekile, esiqinisekisa ukuqina komthelela okungenani okungu-27 Joules ku--20°C, uma kuqhathaniswa nama-S355J0H angu-27 Joules ku-0°C. Kumaphrojekthi asezindaweni ezibandayo noma lawo adinga umkhawulo wokuphepha ophezulu ngokumelene nokuqhekeka okuqhekekile, i-S355J2H iyinto edingekayo, nakuba ibiza kancane. Ekusetshenzisweni okujwayelekile ezindaweni ezifudumele, i-S355J0H ihlala iyindlela ethembekile kakhulu futhi engabizi kakhulu.