Q: Q355 phaj yog dab tsi?
A: Q355 phaj yog qis- alloy siab- lub zog steel phaj hauv Suav teb tus qauv (GB/T 1591-2018). Tsab ntawv "Q" sawv cev rau lub zog tawm los, thiab "355" txhais tau tias nws lub zog qis kawg nkaus yog 355 MPa. Nws yog dav siv nyob rau hauv engineering lug vim nws zoo heev mechanical zog.
Q: Qhov txawv ntawm Q355 phaj thiab Q235 phaj yog dab tsi?
A: Qhov sib txawv ntawm qhov tseem ceeb yog lub zog tawm los: Q355 (355 MPa) siab dua Q235 (235 MPa). Q355 ntxiv cov ntsiab lus alloy xws li Mn, Si, V, Nb, Ti, muaj zog zoo dua, weldability thiab qis - kub ua haujlwm, thiab tuaj yeem txo qhov hnyav ntawm cov qauv. Q235 yog cov pa roj carbon zoo tib yam, haum rau qis - zog yuav tsum tau.
Q: Lub teb chaws tus qauv twg Q355 phaj ua raws li?
A: Tus qauv tseem ceeb yog GB / T 1591-2018Tsawg- alloy siab - lub zog steels. Rau kev xa khoom, nws ua raws li GB / T 3274-2017Carbon structural steel thiab low alloy structural steel kub- dov daim hlau thiab strips. Rau vuam kev ua tau zoo, nws hais txog GB / T 985-2012Vuam seam npaj rau fusion vuam ntawm steel daim hlau.
Q: Q355 phaj yog dab tsi?
A: Raws li GB / T 1591-2018, Q355 tau muab faib ua 5 qib: Q355A, Q355B, Q355C, Q355D, Q355E. Qhov sib txawv yog nyob rau hauv qhov kev ntsuam xyuas qhov yuav tsum tau ua thiab qhov ntsuas kub A qib tsis muaj qhov ntsuas qhov cuam tshuam; B qib yog 20 degree; Qib C yog 0 degree; Qib D yog -20 degree; Qib E yog -40 degree.
Q: Puas yog Q355 phaj sib npaug rau cov qauv thoob ntiaj teb xws li ASTM, EN, lossis JIS?
A: Yog. Nws yog kwv yees li sib npaug rau:
EN 10025-2: S355JR / S355J0 / S355J2 (suav nrog Q355B / C / D)
ASTM A572 Qib 50
JIS G3106: SM490A/B/CNNote: Qhov sib npaug yog rau kev siv xwb. Rau cov haujlwm tshwj xeeb, cov khoom siv kho tshuab thiab cov kev xav tau ntawm cov qauv sib xws yuav tsum raug sib piv nruj me ntsis.