ASTM A252 Yeeb Nkab Khoom
Cov pawg hlau tsim los rau ASTM A252 specifications tej zaum yuav seamless, kuj welded, flash los yog fusion welded, longitudinal submerged arc welded (LSAW) thiab submerged kauv arc welded (HSAW) los yog SSAW.
ASTM A252 Seams nyob rau hauv welded pawg yuav tsum muab kauv taub qab pob qij txha, kauv cap pob qij txha, los yog longitudinal seams.
ASTM A252 yeeb nkab yog tsim los siv kub dov, txias drawn, qhib hearth, yooj yim oxygen los yog hluav taws xob cov txheej txheem.
Qib 3 yeeb nkab tsim los rau qhov kev qhia tshwj xeeb no muaj lub zog tensile siab thiab lub zog tawm ntawm 455 MPa thiab 310 MPa feem. Qhov kev muaj zog ntxiv no ua rau lawv zoo tagnrho rau cov phiaj xwm piling raws li lawv tuaj yeem tiv taus lub zog tsav hnyav los ntawm pawg tsav tsheb ntawm cov yeeb nkab steel.
Thaum siv rau piling, ASTM yeeb nkab pawg tuaj yeem qhib lossis kaw, nyob ntawm seb cov av xav tau.
Tshuaj muaj pes tsawg leeg ntawm A252 steel yeeb nkab
| Phosphorus | |
| Seamless thiab ERW Welded | Max% 0.050 |
ASTM A252 Qib 3 Yeeb Nkab Mechanical Properties
| Qib 1 | Qib 2 | Qib 3 | |
| Tensile zog, min, psi | 50,000 | 60,000 | 66,000 |
| Yield zog | 30,000 | 35,000 | 45,000 |
Muaj nyob rau hauv qhov hnyav thiab qhov ntau thiab tsawg ntawm ASTM A252 tus qauv
Tso cai hnyav variation - 5% mus rau 15%
Raws li ASTM A252 tus qauv, txhua pawg steel yeeb nkab yuav tsum tau hnyav ib tus zuj zus kom ntseeg tau tias nws qhov hnyav tsis txawv dhau qhov txwv saum toj no. Raws li qhov tshwj xeeb no, qhov hnyav pawg yuav tsum tsis txhob siab dua 15% ntawm nws qhov hnyav, lossis tsawg dua 5% ntawm nws qhov hnyav theoretical.
W=nyhav ib qhov ntev, phaus ib ko taw
D= Qhia tawm sab nraud (OD) (inch)
t= Specified nominal phab ntsa thickness nyob rau hauv nti
