1.Dab tsi yog S355JRH steel raj?
Teb: S355JRH yog ib hom ntawm cov qauv hollow seem ua los ntawm tsis yog-alloy zoo grain steel, uas yog kub- tsim. Lub "S355" qhia txog qhov tsawg kawg nkaus tawm lub zog ntawm 355 MPa, thiab "JRH" qhia tias nws tsim nyog rau kev kub dov thiab muaj kev cuam tshuam tshwj xeeb toughness ntawm chav tsev kub. Nws yog feem ntau siv hauv kev tsim kho thiab engineering rau nws lub zog thiab kav ntev.
2.Dab tsi yog cov tshuaj muaj pes tsawg leeg ntawm S355JRH steel raj?
Teb: Cov tshuaj muaj pes tsawg leeg ntawm S355JRH steel muaj xws li cov pa roj carbon (C) txog 0.22%, manganese (Mn) txog 1.60%, silicon (Si) txog 0.55%, phosphorus (P) txog 0.035%, thiab sulfur (S) txog 0.035%. Nws kuj tseem yuav muaj me me ntawm lwm cov ntsiab lus xws li txhuas rau kev ua kom zoo dua qub. Muaj pes tsawg leeg tuaj yeem sib txawv los ntawm cov chaw tsim khoom thiab cov qauv, yog li sab laj EN 10210 kom paub meej.
3.Dab tsi yog cov khoom siv ntawm S355JRH steel raj?
Teb: S355JRH steel tubes muaj qhov tsawg kawg nkaus tawm lub zog ntawm 355 MPa, lub zog tensile xws li 470 txog 630 MPa, thiab qhov tsawg kawg nkaus elongation ntawm 22% (nyob ntawm qhov tuab). Lawv kuj pom muaj qhov cuam tshuam zoo, nrog rau Charpy V-qhov cuam tshuam lub zog tsawg kawg yog 27 J ntawm chav tsev kub (20℃).
4.Dab tsi yog cov ntawv thov tseem ceeb ntawm S355JRH steel hlab?
Teb: S355JRH steel tubes yog siv dav hauv cov qauv siv xws li lub tsev thav duab, txuas hniav, cranes, tshuab, thiab kev txhawb nqa. Lawv tau txais kev pom zoo nyob rau hauv ib puag ncig uas xav tau lub zog siab - rau - qhov hnyav piv, weldability, thiab tsis kam mus rau dynamic loads, xws li nyob rau hauv seismic zones los yog hnyav industrial chaw.
5.Qhov qauv twg S355JRH steel raj ua raws?
Teb: S355JRH steel tubes feem ntau ua raws li European cov qauv xws li EN 10210-1 thiab EN 10210-2 rau cov khoom kub ua tiav qhov hollow seem. Lawv kuj tseem tuaj yeem ua tau raws li cov qauv kev soj ntsuam thiab kev ua tau zoo, xws li EN 10025 rau cov khoom lag luam tiaj tus, tab sis nws yog ib qho tseem ceeb uas yuav tsum tau kuaj xyuas nrog cov ntawv pov thawj ntawm cov neeg muag khoom.
