JR sawv rau dab tsi hauv S235JR?
S235JR yog ib qho tsis yog - alloy structural steel qib tau teev tseg hauv European tus qauv EN10025. "S" sawv cev rau Structural Steel, "235" qhia qhov qis qis ntawm cov khoom siv lub zog tawm los yog 235 MPa, thiab "JR" sawv cev rau qhov kev xav tau ntawm lub zog ntawm 0 degree. Raws li qhov dav dav - lub hom phiaj steel qauv tsim los ntawm European Committee for Standardization (CEN), S235JR muaj kev siv dav hauv kev tsim khoom, kev tsim vaj tsev, thiab lwm yam.
Los ntawm kev faib cov khoom foundations, S235JR belongs rau qis - carbon carbon structural steel. Nws cov tshuaj muaj pes tsawg leeg thiab cov khoom siv tshuab yog qhov sib npaug ntawm Q235B qib hauv Suav teb tus qauv GB / T700. Cov hlau no muaj cov ntsiab lus ntawm cov pa roj carbon tsawg (feem ntau ntawm 0.05% thiab 0.70%), zoo heev weldability thiab formability, thiab tshwj xeeb tshaj yog haum rau kev tsim ntawm ntau yam welded lug, bolted kev twb kev txuas, thiab riveted lug.
Carbon structural steel tuaj yeem muab faib ua ob pawg loj raws li nws qib zoo: cov pa roj carbon zoo tib yam steel thiab siab - zoo carbon structural steel. S235JR belongs rau qeb ntawm cov qauv carbon zoo tib yam. Txawm hais tias nws cov khoom siv kho tshuab tsis ruaj khov zoo li cov qib siab - cov pa roj carbon zoo, nws muaj txiaj ntsig zoo ntawm kev lag luam hauv kev siv cov txheej txheem uas tsis tas yuav muaj kev ntxhov siab lossis cuam tshuam vim nws cov nqi qis thiab kev ua haujlwm zoo.
Standards thiab Certification Requirements
Kev tsim khoom thiab kev tswj xyuas zoo ntawm S235JR steel nruj me ntsis ua raws li EN10025 tus qauv system. Cov txheej txheem no qhia meej txog cov tshuaj muaj pes tsawg leeg, cov khoom siv kho tshuab, qhov ntev ntev, thiab qhov zoo ntawm cov qauv hlau.
EN10025, raws li cov txheej txheem European feem ntau siv rau cov qauv hlau, tau txais kev pom zoo los ntawm International Organization for Standardization (ISO) raws li tus qauv thoob ntiaj teb, ua kom ntseeg tau qhov zoo ntawm S235JR steel thoob ntiaj teb.
Cov txheej txheem ntau lawm thiab kev xa khoom
Raws li cov neeg siv khoom xav tau thiab kev siv ib puag ncig, S235JR steel tuaj yeem xa tuaj rau hauv ob lub ntsiab kev kho cua sov: normalized thiab tswj dov. Normalizing refines cov nplej thiab txhim kho cov uniformity ntawm cov khoom siv tshuab; tswj dov ua tiav ib qho zoo tagnrho microstructure los ntawm precisely tswj lub dov kub thiab deformation.
Chemical Composition Table
| Element | S235JR (%) |
|---|---|
| Cov pa roj carbon (C) | Tsawg dua lossis sib npaug li 0.22 |
| Silicon (Si) | Tsawg dua los yog sib npaug li 0.55 |
| Manganese (Mn) | Tsawg dua lossis sib npaug li 1.50 |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.035 |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.035 |
| Copper (Cu) | Tsawg dua los yog sib npaug li 0.55 |
| Nitrogen (N) | Tsawg dua lossis sib npaug li 0.012 |
Mechanical Properties Table
| Khoom | S235JR (MPa) |
|---|---|
| Yield zog (Re) | Ntau dua lossis sib npaug rau 235 |
| Tensile zog (Rm) | 360-510 |
| Elongation (A) | Ntau dua lossis sib npaug li 18% |
Mechanical Performance Table
| Khoom | S235 JR |
|---|---|
| Impact Toughness (KV) | Ntau dua lossis sib npaug rau 27J (0 degree) |
| Hardness (HBW) | 120-170 |
| Txias Bending Performance | Dhau qhov kev sim khoov nrog d=2a |
S235JR square tube Hoobkas
