S275 JRyog ntau yam uas tsis yog- alloy (mos) carbon structural steel dav siv hauv kev tsim kho thiab kev lag luam engineering. Nws yog tswj hwm los ntawm European tus qauv EN 10025-2 thiab paub txog nws qhov zoo tshaj plaws weldability, formability, thiab machinability.
Kev tawg ntawm lub npe "S275JR"
S: Qhia tau tias nws yog Cov Khoom Siv Hluav Taws Xob.
275: Sawv cev qhov tsawg kawg nkaus Yield Strength ntawm 275 MPa (kuaj ntawm cov khoom siv nrog lub thickness tsawg dua los yog sib npaug li 16 hli).
JR: Qhia cov qib zoo ntsig txog kev cuam tshuam. Tshwj xeeb, nws muaj qhov tsawg kawg nkaus Charpy cuam tshuam tus nqi ntawm 27 Joules ntawm chav tsev kub (+20℃).
Cov yam ntxwv tseem ceeb
Weldability: Siab weldable vim nws cov ntsiab lus carbon tsawg (max 0.21-0.25% nyob ntawm thickness), yuav tsum tsis txhob preheating los yog tshwj xeeb kub kho rau cov qauv siv.
Formability: Haum rau kev sib sau txias, khoov, thiab folding.
Durability: Muaj kev cuam tshuam zoo, ua rau nws txhim khu kev qha rau kev thauj khoom -cov qauv kabmob.
Tej kev siv
Kev tsim kho: Lub moj khaum rau cov tsev, kab, thiab kab teeb.
Infrastructure: Choj tsev, trusses, thiab railings.
Manufacturing: Muaj machinery, cia tank, thiab tsheb chassis.
International sib npaug
Thaum cov qauv sib txawv, S275JR feem ntau piv rau cov qib hauv qab no:
TEB CHAWS USA (ASTM): ASTM A36 (feem ntau hloov rau qis- qhov kev ntxhov siab, txawm hais tias S275JR muaj cov txiaj ntsig siab dua) lossis A529 Gr.D.
Tuam Tshoj (GB): Q275.
Nyiv (JIS): SS400.
Lub teb chaws Yelemees (DIN): St44-2.
UK (BS): 43A lossis 43B (tam sim no hloov los ntawm EN tus qauv).
Cov yam ntxwv tseem ceeb ntawm ib saib
| Property/Designation | Specification |
|---|---|
| Txuj | TS EN 10025-2 |
| Lub ntsiab lus ntawm "S275JR" | S= Cov qauv hlau 275 = Yam tsawg kawg nkaus Yield Strengthntawm 275 MPa (rau thickness Tsawg dua los yog sib npaug rau 16mm) J= Impact toughness kuaj ntawmChav ntsuas kub(+20 degree) R= Yam tsawg kawg nkaus lub zog ntawm27 jul |
| Hom Tensile Strength | 410 - 560 MPa |
| Main Kev Xa Khoom | Kub-rolled (AR), Normalized (N), los yog Thermomechanically dov (M) |
| Thawj Qhov Zoo | Weldability zoo heev thiab formability, yooj yim muaj, tus nqi qis dua qib siab dua. |
Sib piv nrog Cov Qib Siab
Nws zaum nruab nrab ntawm cov hlau me me tshaj plaws (S235 JR) thiab nrov siab -lub zog steel (S355 JR) ntawm lub zog.
| Qib | Min. Yield zog (MPa) | Hom Siv Case |
|---|---|---|
| S235 JR | 235 | Cov qauv teeb, tsis yog - cov txheej txheem tseem ceeb |
| S275 JR | 275 | Kev tsim kho dav dav, lub tsev thav duab, tshuab hauv paus, platforms |
| S355 JR | 355 | Cov khoom hnyav hnyav, cranes, tsheb |