Kwicandelo lobunjineli bolwakhiwo kunye nolwakhiwo, ukukhetha izinto ezifanelekileyo kubaluleke kakhulu ukuqinisekisa ukhuseleko, ixesha elide, kunye nokusebenza kakuhle kweendleko. Umgangatho waseYurophuEN10210icacisa iimeko zobugcisa zokuhanjiswa kwesakhiwo esigqityiweyo ngobushushuiindawo ezingenantozenziwe ngeentsimbi ezingezo-alloy kunye neentsimbi ezicolekileyo. Phakathi kweendidi ezichazwe rhoqo yi-S355J0H kunye ne-S355J2H. Nangona ziphuma kusapho olunye kwaye zabelana ngeempawu ezininzi, ukuqonda umahluko wazo ocacileyo kubalulekile ekukhetheni izinto ezifanelekileyo. Eli nqaku liza kujonga kwiipropati ezahlukeneyo, ukwakheka kweekhemikhali, ukusebenza koomatshini, kunye nokusetyenziswa okuqhelekileyo kwezi ndidi zimbini zentsimbi.

1. Ukuchaza iSigaba seNsimbi

Inkqubo yokumisela ngokwayo inika izikhokelo zokuqala zobuntu babo kunye nenjongo yabo. Ngokwe-EN 10027-1, amagama ahlulwe ngolu hlobo lulandelayo:

S: Imele "iStructural Steel."

355: Ibonisa amandla amancinci okuvelisa (kwii-megapascals, i-MPa) kubukhulu obufikelela kwi-16 mm. Oku kufana okuphambili phakathi kwala manqanaba mabini.

J0 / J2: Le nxalenye ibonisa ukuqina kwempembelelo efunekayo. "J0" ithetha ukuba izinto kufuneka zifikelele kumandla empembelelo amancinci angama-27 Joules kwi-0°C. "J2" iyalela amandla empembelelo amancinci afanayo angama-27 Joules, kodwa kubushushu obuphantsi obuyi--20°C.

H: Ichaza "Amacandelo Angenanto," ngakumbi lawo agqityiweyo ngokushushu, njengoko kuchaziwe ngumgangatho we-EN10210.

2. Ukwakhiwa kweeKhemikhali: Iinguqu ezincinci ezinempembelelo ebalulekileyo

Zombini i-S355J0H kunye ne-S355J2H ziintsimbi ezakhiweyo ezine-manganese ezaziwa ngokudityaniswa kakuhle kwazo. Iimfuneko zokwakheka kweekhemikhali ngokwe-EN10210 ziyafana kakhulu, kodwa kukho umahluko omkhulu kwimida evumelekileyo yesulfure (S), i-phosphorus (P), kunye ne-deoxidation practice, ezichaphazela ngokuthe ngqo ukucoceka kwentsimbi kunye nokusebenza kwayo kubushushu obuphantsi.

I-element yeKhemikhali	S355J0H (Ipesenti ephezulu eqhelekileyo)	I-S355J2H (Ipesenti ephezulu eqhelekileyo)	Impembelelo yoMmahluko
Ikhabhoni (C)	≤ 0.22	≤ 0.22	Kuyafana; kuqinisekisa ukuba iqine kakuhle kwaye iyathungwa.
IManganese (Mn)	≤ 1.60	≤ 1.60	Kuyafana; kunceda ekuqiniseni.
I-Silicon (Si)	≤ 0.55	≤ 0.55	Kuyafana; isebenza njenge-deoxidizer.
I-Phosphorus (P)	≤ 0.035	≤ 0.030	I-J2H inomda oqinileyo, onciphisa ukuqhekeka.
I-Sulfur (S)	≤ 0.035	≤ 0.030	I-J2H inomda oqinileyo, ophucula ucoceko kunye nokuqina.
I-nitrogen (N)	≤ 0.009	-	I-J2H idla ngokubulawa ngokupheleleyo (ilungiswe ngeenkozo ezincinci), nto leyo ethintela imfuneko yexabiso eliphezulu le-N.

Into ebalulekileyo kukuba i-S355J2H ifuna ulawulo oluqinileyo lokungcola okufana ne-phosphorus ne-sulfur. Oku kubangela intsimbi ecocekileyo enesakhiwo esifana kakhulu, esibalulekileyo ekufezekiseni ukuqina okuthembekileyo kumaqondo obushushu angaphantsi kwe-zero. Ngaphezu koko, i-S355J2H ihlelwa njengentsimbi "FF" (ebulewe ngokupheleleyo), oko kuthetha ukuba iphathwa ngezinto ezifana ne-aluminium ukwenza isakhiwo esineengcongolo ezincinci, nto leyo ephucula ukuqina. I-S355J0H ngokubanzi yi-"FN" (intsimbi ye-rimming ayivumelekanga), engqongqo kancinci.

3. Iimpawu zoomatshini: Umahluko ocacileyo kuBulukhuni

Njengoko indlela echazwe ngayo inqanaba ibonisa, iimpawu zoomatshini, ngakumbi amandla okukhupha kunye nokuqina, ziyafana kakhulu kuzo zombini iinqanaba. Umahluko ocacileyo kukusebenza kwazo phantsi komthwalo onzima kumaqondo obushushu ahlukeneyo.

Ipropati yoomatshini	S355J0H	S355J2H
Amandla okuVuna (ReH)	≥ 355 MPa (t ≤ 16mm)	≥ 355 MPa (t ≤ 16mm)
Amandla okuThamba (Rm)	470 - 630 MPa (t ≤ 3mm)	470 - 630 MPa (t ≤ 3mm)
Ukwandiswa (A)	≥ 22% (i-longitudinal)	≥ 22% (i-longitudinal)
Amandla empembelelo (KV)	≥ 27 J @ 0°C	≥ 27 J @ -20°C

Lo mahluko kubushushu bovavanyo lwempembelelo yeyona nto ibalulekileyo ekukhetheni phakathi kwezi zimbini. Nangona i-S355J0H iqinile ngokwaneleyo kwiindlela ezininzi zangaphakathi nezangaphandle ezishushu, i-S355J2H yenzelwe ukumelana nokuqhekeka okubuthathaka kwiindawo ezibandayo.

4. Izicelo kunye neMigqaliselo yoKhetho

Ukukhetha phakathi kwe-S355J0H kunye ne-S355J2H kuxhomekeka kakhulu kubushushu obuphantsi benkonzo yesakhiwo kunye nokubaluleka kwesicelo.

S355J0H: Ukhetho Olusebenzayo Kwiindleko Zemozulu Ezishushu

Izicelo Eziqhelekileyo: Ulwakhiwo oluqhelekileyo lwezakhiwo, amabala emidlalo, amaqonga, kunye nezixhobo zoomatshini kwimimandla enemozulu epholileyo okanye epholileyo apho amaqondo obushushu angafane ehle, ukuba ayenzeka, abe ngaphantsi kwe-0°C.

Inzuzo: Inika amandla amahle kunye nokudityaniswa ngentsimbi kwinqanaba eliphantsi ngokubanzi kune-J2, nto leyo eyenza ukuba ibe lukhetho olungabizi kakhulu kwiiprojekthi apho impembelelo yobushushu obuphantsi ingeyongxaki iphambili.

I-S355J2H: Ukhetho Lokhuseleko Kwiindawo Ezifuna Ukhuseleko Nezibandayo

Izicelo Eziqhelekileyo: Izakhiwo zaselunxwemeni, iibhulorho ezikwiintaba okanye kwimimandla esemantla, iindawo zokugcina izinto ezibandayo, iinqaba zomoya, kunye nayo nayiphi na into yokwakha engaphantsi komthwalo oguquguqukayo kwiimeko zobushushu obuphantsi.

Inzuzo: Ukusebenza kwayo okuqinisekisiweyo kwempembelelo kwi -20°C kubonelela ngomda wokhuseleko olubalulekileyo ngokuchasene nokuqhekeka okuyingozi kwe-brittle kwiindawo ezibandayo. Ulwakhiwo lwengqolowa ecocekileyo lukwanegalelo elincinci ekuphuculeni ukuwelda kunye neempawu zokutyeba.

Isiphelo

Ngamafutshane, zombiniEN10210 S355J0Hkunye ne-S355J2H ziintsimbi ezikumgangatho ophezulu, ezigqityiweyo ngokushushu nezineendawo ezingenanto ezibonelela ngamandla okuvelisa ubuncinci be-355 MPa. Zabelana ngesiseko esifanayo sekhemikhali kunye neemfuno ezifanayo zokuqina kokuxinana kunye nokukhupha. Nangona kunjalo, azitshintshiseki kuzo zonke iimeko. I-S355J2H yahlula ngokulawula ngokungqongqo ukungcola (P & S) kunye nesakhiwo esipheleleyo, esineengcongolo ezincinci, esiqinisekisa ukuqina okuncinci kwempembelelo ye-27 Joules kwi--20°C, xa kuthelekiswa ne-S355J0H's 27 Joules kwi-0°C. Kwiiprojekthi ezikwimozulu ebandayo okanye ezo zifuna umda wokhuseleko ophezulu ngokuchasene nokuqhekeka okubuthathaka, i-S355J2H lukhetho oluyimfuneko, nangona lubiza kancinci. Kwiizicelo eziqhelekileyo kwiindawo ezinobushushu obuphantsi, i-S355J0H ihlala iyindlela ethembekileyo kakhulu kwaye engabizi kakhulu.