1. Hom: S355 steel phaj
2. Yam ntxwv: S355 low carbon alloy steel, S355NL yog cov hlau tsis zoo (zoo grain steel) hauv EN 10025-3: 2004 tus qauv. Nws lub zog tawm los thiab lub zog tensile sib haum rau kuv lub teb chaws Q345 qis alloy hlau. NL yog qhov yuav tsum tau ua hauv kev coj ua qhov cuam tshuam kev nqus hluav taws xob hauv qhov ntsuas kub qis ntawm qhov qis dua 50 degrees Celsius, thiab qhov cuam tshuam tus nqi tsis tsawg dua 27J.
3. Qhov txawv ntawm S355 thiab Q345B: Qhov txawv ntawm vuam yog dab tsi? SS355 muaj zog me ntsis dua Q345B, tab sis cov vuam yog tib yam.
4. Tshuaj muaj pes tsawg leeg ntawm S355: Tshuaj muaj pes tsawg leeg ntawm S355: S355 tsawg alloy structural steel, S355 muaj pes tsawg leeg carbon (C) Tsawg dua los yog sib npaug rau 0.24; phosphorus (P), sulfur (S) Tsawg dua lossis sib npaug rau 0.04. Rov qab mus rau Sohu kom pom ntau ntxiv
S355 steel nyob rau hauv Tuam Tshoj yog ib tug low-alloy high-strength structural steel nrog ib tug hardness ntawm 70-80B thiab ib tug yield zog ntawm 300-400MPa.
Cov qib steel ntawm tuab steel phaj yog roughly tib yam li ntawm nyias steel phaj. Nyob rau hauv txhua yam ntawm cov khoom, ntxiv rau choj steel daim hlau, boiler steel daim hlau, tsheb steel daim hlau, siab hlab ntsha steel daim hlau thiab ntau txheej high-pressure nkoj steel daim hlau, uas yog purely tuab daim hlau, ib co hom steel phaj xws li tsheb. Girder steel daim hlau (thickness 2.5 ~ 10 mm), cov qauv hlau phaj (thickness 2.5 ~ 8 mm), stainless hlau daim hlau, cov hlau tsis muaj cua sov thiab lwm yam sib tshuam nrog cov phaj nyias.
S355 steel phaj qhia:
(1) Tsawg hardenability. Raws li ib txwm muaj, qhov siab tshaj plaws quenching txoj kab uas hla ntawm carbon steel dej quenching tsuas yog 10 hli -20 hli.
(2) Lub zog thiab tawm los piv yog tsawg. Piv txwv li, σs ntawm cov pa roj carbon zoo tib yam Q235 steel yog 235MPa, thaum lub σs ntawm cov hlau tsis tshua muaj hlau 16Mn yog ntau tshaj 360MPa. Lub σs / σb ntawm 40 steel tsuas yog 0.43, uas yog qis dua cov hlau alloy.
(3) Tsis zoo tempering stability. Vim tsis zoo tempering stability, thaum carbon steel yog quenched thiab tempered, thiaj li yuav ua kom muaj zog dua, yuav tsum tau siv ib tug tsawg tempering kub, thiaj li hais tias lub toughness ntawm cov hlau yog tsawg; Txhawm rau kom ntseeg tau tias muaj zog zoo dua, qhov kub thiab txias yog siv Lub zog tsawg, yog li cov khoom siv dav dav ntawm cov pa roj carbon steel tsis siab.
(4) Tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua haujlwm tshwj xeeb. Cov pa roj carbon steel feem ntau tsis zoo nyob rau hauv oxidation tsis kam, corrosion kuj, kub tsis kam, kub tsis kam, hnav tsis kam thiab tshwj xeeb electromagnetic zog, thiab tsis tuaj yeem ua tau raws li qhov xav tau ntawm kev ua haujlwm tshwj xeeb.
