S: Sawv cev rau cov qauv hlau, qhia txog nws qhov kev siv tseem ceeb hauv kev thauj khoom -cov kabmob.
355: Sawv cev nws qhov tsawg kawg nkaus tawm lub zog ntawm 355 MPa. Qhov no txhais tau hais tias cov hlau no tsuas yog pib ua qhov tseem ceeb, hloov tsis tau deformation thaum raug kev ntxhov siab ntawm 355 MPa. Tus nqi no ntau dua li cov pa roj carbon zoo tib yam (xws li S235), muab lub nra hnyav dua -cov kabmob muaj peev xwm.
J: Qhia txog kev ua haujlwm ntawm lub zog ntawm 0 degrees Celsius (0 degree). Nws yuav tsum tau cov hlau nqus tsawg kawg yog 27 joules (J) ntawm lub zog thaum lub sij hawm Charpy V-notch impact test at 0℃.
R: Sawv cev ua Rolled. Qhov no txhais tau hais tias cov hlau tau kub - dov yam tsis muaj kev kho cua sov ntxiv (xws li normalizing lossis tempering), tuav nws cov ncej - dov zog.
Cov tshuaj muaj pes tsawg leeg ntawm S355JR steel yeeb nkab suav nrog:
Carbon (C): Tsawg dua lossis sib npaug rau 0.24%
Silicon (Si): Tsawg dua lossis sib npaug li 0.55%
Manganese (Mn): Tsawg dua lossis sib npaug li 1.60%
Phosphorus (P): Tsawg dua lossis sib npaug rau 0.025%
Sulfur (S): Tsawg dua lossis sib npaug rau 0.025%
Copper (Cu): Tsawg dua lossis sib npaug li 0.55%
Cov ntsiab lus ntawm cov ntsiab lus alloying yog nruj me ntsis tswj xyuas kom cov neeg kho tshuab thiab weldability ntawm cov yeeb nkab steel.
Mechanical Properties
S355JR steel yeeb nkab muaj cov cuab yeej zoo heev, tshwj xeeb hauv qab no:
Yield Strength: Qhov tsawg kawg nkaus tawm lub zog yog siab li 355 MPa, nrog lub zog tawm los tiag tiag feem ntau ntawm 300 thiab 400 MPa.
Tensile Strength: Ntau yam ntawm 470 txog 630 MPa, nthuav tawm lub zog tensile siab thiab muaj peev xwm tiv taus qhov hnyav thiab kev ntxhov siab.
Elongation: ncav cuag li 22%, nws qhia txog cov khoom ductility ua ntej tawg thiab yog ib qho tseem ceeb qhia rau kev ntsuam xyuas toughness.
Impact Toughness: Qhov cuam tshuam toughness ntawm 20℃nce mus txog 27 J, qhia tias nws muaj peev xwm tswj tau nws cov duab thiab cov khoom raws li kev cuam tshuam lossis kev co.
Physical Properties thiab Machinability
Hardness: Lub hardness ntawm S355JR steel yeeb nkab feem ntau yog nruab nrab ntawm 70 thiab 80B, pom zoo hnav tsis kam.
Weldability: S355JR steel yeeb nkab muaj qhov zoo weldability, yooj yim rau ntau yam vuam txheej txheem xws li phau ntawv arc vuam, submerged arc vuam, thiab roj shielded vuam, muab engineers thiab designers nrog ntau dua tsim yooj.
Machinability: S355JR steel yeeb nkab tsis tsuas yog muaj qhov ua haujlwm txias txias, tab sis kuj yooj yim rau kev ua haujlwm kub, xws li txiav, khoov, thiab sib sau.
S355JR SHS Tube Hoobkas
