Dab tsi yogQ345steel qib sib npaug?
Q345 yog ib qho qis- alloy siab- lub zog steel qauv hauv Suav teb tus qauv (GB/T 1591). Cov qib sib npaug thoob ntiaj teb cov qib steel feem ntau yog qis- alloy structural steels nrog lub zog ntawm 345-355MPa, xws li European S355, American A572 Gr50, thiab lwm yam.
Puas yog Q345B thiab Q345 tib yam?
Tsis yog, qhov sib txawv tseem ceeb ntawm ob yog raws li hauv qab no:
|
Cov khoom sib piv |
Q345 (qib theem pib) |
Q345B (qib zoo) |
|
Txuj hauv paus |
GB/T 1591 |
GB/T 1591 |
|
Qib zoo |
Tsis muaj kev faib tawm |
Chav Kawm B (-20℃cuam tshuam) |
|
Tshuaj muaj pes tsawg leeg |
General tswj |
Tsawg phosphorus thiab sulfur (P Tsawg dua lossis sib npaug rau 0.030%, S Tsawg dua lossis sib npaug rau 0.025%) |
|
Kev cuam tshuam lub zog xav tau |
Tsis muaj qhov yuav tsum tau muaj qhov kub thiab txias |
-20℃Akv Ntau dua lossis sib npaug rau 34J |
|
Hom kev siv |
Ordinary structural qhov chaw |
Txuas hniav / nkoj / cryogenic siab hlab ntsha |
Qhov twg zoo dua Q345 lossis Q235 steel?
Q345 muaj kev ua tau zoo dua tab sis tus nqi siab dua, haum rau cov khoom tseem ceeb -cov kabmob, xws li txuas hniav, cov tshuab hnyav, thiab siab - nce steel qauv; Q235 yog kev lag luam thiab tsim nyog rau cov hom phiaj dav dav xws li laj kab thiab cov cuab yeej me me
Dab tsi yog qhov ceev ntawm Q345 steel?
Q345 yog ib qho qis- alloy, siab- lub zog cov qauv hlau, tab sis nws cov alloy muaj pes tsawg leeg tsis tshua muaj kev cuam tshuam rau tag nrho qhov ntom, yog li qhov ceev yog tib yam li cov hlau xws li Q235 thiab Q390, uas yog 7.85 g / cm³ (los yog 7850 kg / m³).
Cov ntaub ntawv twg tuaj yeem hloov Q345?
Thaum Q345 steel hloov los ntawm lwm cov ntaub ntawv, nws yog ib qho tsim nyog yuav tsum tau ua tib zoo xav txog lub zog, toughness, weldability, nqi thiab daim ntawv thov ib puag ncig.
|
Lwm yam khoom siv |
txheem |
Yield zog |
Qhov zoo |
Muaj cov xwm txheej |
|
S355 JR |
TS EN 10025 |
Ntau dua lossis sib npaug li 355 MPa |
Ncaj nraim sib npaug, universal hauv Europe |
Tsev, choj |
|
A572 Qib 50 |
ASTM A572 Cov Lus Qhia Tshwj Xeeb |
Ntau dua lossis sib npaug li 345 MPa |
American standard sib npaug, export project |
Cov cuab yeej siv tshuab, cov hlab ntsha siab |
|
Q390 |
GB/T 1591 |
Ntau dua lossis sib npaug li 390 MPa |
Lub zog ntau dua, hnyav dua |
Cua zog, hnyav machinery |
|
S355 NL |
TS EN 10025 |
Ntau dua lossis sib npaug li 355 MPa |
Tsawg kub toughness (-50 degree) |
Polar thiab cheeb tsam txias |
|
A588 |
ASTM A588 Cov Lus Qhia Tshwj Xeeb |
Ntau dua lossis sib npaug li 345 MPa |
Huab cua tsis kam, tsis tas yuav tsum tau pleev xim |
Sab nraum zoov choj, yees |
