Txheej txheem cej luam ntawm S275 Carbon Steel
S275 yog ib qho uas tsis yog- alloy, qis carbon structural steel txhais los ntawm European tus qauvTS EN 10025-2. Tus "S" sawv cev rau "Structural Steel," thiab "275" qhia qhovyam tsawg kawg nkaus yield zogntawm 275 MPa (Megapascals) rau cov khoom tuab (tsawg dua lossis sib npaug li 16 hli).
Thaum muab los ntawm cov yeeb nkab lossis raj, nws feem ntau yog tswj hwm los ntawm cov txheej txheem sib txawv, uas yuav tau them rau hauv qab no.
Cov yam ntxwv tseem ceeb thiab cov khoom
Zoo zog thiab Ductility:Nrog lub zog tawm los ntawm 275 MPa rau 235 MPa (nyob ntawm qhov tuab) thiab lub zog tensile ntawm 410 txog 560 MPa, nws muaj qhov sib npaug zoo rau kev siv cov qauv. Nws yog ib qho yooj yim rau kev tsim thiab weld.
Weldability zoo heev:Vim nws cov ntsiab lus tsis tshua muaj carbon, S275 steel tuaj yeem welded tau yooj yim siv txhua txoj hauv kev tsis muaj ua ntej lossis tom qab- cua sov (feem ntau), ua rau nws tsim nyog rau cov qauv tsim.
Machineability:Nws muaj kev ua haujlwm zoo hauv nws qhov qub lossis kub -rolled mob.
Impact Resistance:Nws muab kev cuam tshuam txaus rau feem ntau cov hom phiaj kev tsim kho.
Mechanical Properties (EN 10025-2 rau cov khoom siv ncaj qha)
| Khoom Thickness (t) | Yield zog (min, MPa) | Tensile zog (MPa) | Elongation (min,%) |
|---|---|---|---|
| t Tsawg dua lossis sib npaug li 16 hli | 275 MPa rau | 410 - 560 MPa | 23 |
16 hli | 265 MPa rau |
410 - 560 MPa |
23 |
|
40 mm | 255 MPa |
410 - 560 MPa |
22 |
|
63 hli | 245 MPa rau |
410 - 560 MPa |
21 |
|
| 80 mm < t Tsawg dua los yog sib npaug li 100 mm | 235 MPa rau | 410 - 560 MPa | 21 |
Nco tseg: Cov khoom muaj tseeb ntawm cov yeeb nkab tiav yuav raug teev nyob rau hauv cov txheej txheem raj / yeeb nkab.
Raws li cov qauv rau S275 Steel Pipe
S275 cov khoom yog tsim rau hauv cov kav dej thiab cov kav dej raws li ntau yam European qauv. Cov feem ntau yog:
TS EN 10210-1 & EN 10210-2: Kub Finished Structure Hollow Sections
Qhov no yog tus qauv tshaj plaws rau S275 cov kav dej (feem ntau hu ua HFS - Kub Finished Seamless lossis HFW - Kub Finished Welded).
Cov kav dej no yog siv rau kev tsim kho vaj tse, kev txhawb nqa kab, thiab lwm yam kev thauj khoom -cov kabmob.
Cov qib steel feem ntau raug xaiv raws liS275J0Hlos yogS275J2H. Qhov "H" qhia tias nws haum rau cov seem hollow. "J0" thiab "J2" qhia txog qib sib txawv ntawm kev cuam tshuam qhov hnyav (Charpy V-notch) ntawm 0℃thiab -20 degree, raws li.
TS EN 10219-1 & EN 10219-2: Cold formed Structural Hollow Sections
Cov no yog cov kav dej txias - ua welded kav. Lawv feem ntau tsis tshua kim tshaj qhov kub - ua tiav tab sis muaj cov khoom sib txawv me ntsis vim yog cov txheej txheem tsim khoom.
Cov npe qeb yog tib yam:S275J0HthiabS275J2H.
EN 10255: Tsis yog - Alloy Steel Tubes Haum rau Vuam thiab Threading
Cov qauv no suav nrog cov kav dej siv rau kev tsim vaj tsev dav dav thiab lub hom phiaj siab. S275 tuaj yeem muab tau raws li tus qauv no, feem ntau rau cov ntawv thov tseem ceeb.
Cov ntawv thov siv
S275 steel kav yog ntau yam thiab siv nyob rau hauv ntau yam kev lag luam:
Kev tsim kho thiab tsim cov ncej:Raws li cov kab, kab teeb, thiab trusses hauv kev lag luam thiab cov tsev lag luam.
Kev them nyiaj yug tus qauv:Rau platforms, walkways, thiab guardrails.
Mechanical thiab General Engineering:Rau lub tshuab thav duab, kev txhawb nqa, thiab cov khoom siv uas muaj lub zog siab tsis yog qhov tseem ceeb.
Infrastructure Projects:Hauv cov choj, chaw ntau pob, thiab lwm yam loj - nplai qauv.
Cov kav dej:Rau kev thauj dej, huab cua, thiab lwm yam uas tsis yog - cov kua dej corrosive ntawm qhov tsis tshua muaj siab.
Sib piv nrog Lwm Cov Qib Siab
| Khoom | S235 | S275 | S355 |
|---|---|---|---|
| Yield zog (min) | 235 MPa rau | 275 MPa rau | 355 MPa rau |
| Tensile zog | 360-510 MPa | 410-560 MPa | 470-630 MPa |
| Cov ntsiab lus carbon | qis | Siab dua me ntsis | Siab dua |
| Lub zog | qis | Nruab nrab | Siab dua |
| Nqi | qis | Nruab nrab | Siab dua |
Cov ntsiab lus:S275 muaj lub zog loj dua S235 yam tsis muaj tus nqi dhia loj, ua rau nws nrov heev thiab tus nqi - kev xaiv zoo rau ntau daim ntawv thov. S355 muaj zog dua tab sis kuj kim dua.
Qib sib npaug hauv Lwm Cov Qauv
Nws yog ib qho tseem ceeb kom paub cov ntaub ntawv sib npaug hauv cov qauv hauv cheeb tsam sib txawv.
USA (ASTM): A36yog qhov sib npaug ze heev ntawm cov khoom siv kho tshuab thiab kev siv.ASTM A53 Qib Bkuj yog ib hom yeeb nkab sib npaug.
Tuam Tshoj (GB): Q275yog qhov sib npaug ncaj qha.
International (ISO): Fe430 ib(raws li ISO 630-2).
Cov ntsiab lus
S275 carbon steel yeeb nkabyog ib qho khoom siv ntau yam, kev lag luam, thiab muaj ntau yam khoom siv hlau. Nws zoo heev weldability, zoo zog, thiab formability ua rau nws yog ib qho kev xaiv sab saum toj rau ib tug loj array ntawm kev tsim kho thiab engineering tej yaam num uas siab zog los yog corrosion kuj tsis yog ib qho tseem ceeb yuav tsum tau. Thaum muab khoom, nco ntsoov lees paub cov qauv yeeb nkab tshwj xeeb (xws li EN 10210) thiab qib -qib (piv txwv li, S275J2H) kom ntseeg tau tias nws ua tau raws li koj qhov project qhov kev xav tau ntawm kev siv tshuab thiab toughness.
