Q355 yog lub siab -zoo qis- alloy siab - lub zog steel qauv. Nws yog lub npe tshiab ntawm cov qauv qub 16Mn thiab q345. Txij li thaum q345 tau teev tseg hauv thawj GB / T 1591-2008 tus qauv tsis tuaj yeem synchronized nrog EU S355, National Standards Committee tau tshaj tawm txoj cai tshiab GB / T 1591-2018, uas tau teev tseg tias q345 hloov mus rau q355, uas yuav raug siv txij Lub Ob Hlis 1, 2019.
Q355 seamless steel yeeb nkab muaj cov khoom zoo heev, suav nrog qis -kub tsis kam, vuam yooj yim, kev ua haujlwm zoo heev, siab zog, zoo heev toughness, zoo hnav tsis kam, qaug zog, thiab corrosion kuj.
Kev siv dav hauv cov choj, tsheb, nkoj, cov tsev, lub nkoj siab, cov khoom siv tshwj xeeb, thiab lwm yam. Ntawm lawv, "Q" txhais tau tias muaj zog yield thiab 355 txhais tau hais tias lub zog tawm los ntawm cov hlau no yog 355MPa, thiab nws cov nqi tawm los yuav txo qis raws li cov thickness ntawm cov khoom nce.
Q355 seamless steel yeeb nkab tau muab faib ua tsib qib: A, B, C, D, thiab E, uas sawv cev rau qhov sib txawv ntawm qhov kub thiab txias:
- Qib Q355a: Tsis muaj qhov ntsuas qhov cuam tshuam.
- Q355b qib: cuam tshuam kev ntsuas ntawm 20 degrees qhov kub thiab txias.
- Q355c qib: 0℃cuam tshuam kuaj.
- Q355d qib: -20℃cuam tshuam kev xeem.
- Q355e qib: -40℃cuam tshuam kev xeem.
Raws li qhov sib txawv ntawm qhov kub thiab txias, qhov cuam tshuam qhov tseem ceeb kuj txawv. Cov tshuaj muaj pes tsawg leeg ntawm Q355 suav nrog C, Si, Mn, P, S, Cr, Ni, thiab Cu. Cov ntsiab lus ntawm C, Si, thiab Mn tau tswj xyuas nruj kom ntseeg tau tias lawv cov khoom siv kho tshuab thiab cov txheej txheem ua tau zoo.
Cov khoom siv kho tshuab ntawm Q355 suav nrog lub zog tawm los, lub zog tensile, thiab elongation. Yield zog yog cov khoom muaj peev xwm tiv thaiv deformation ntawm qhov taw tes tawm los. Rau Q355, nws lub zog tawm los maj mam txo qis thaum cov yeeb nkab phab ntsa thickness nce.
Lub zog tensile yog qhov siab tshaj plaws uas cov khoom tuaj yeem tiv taus ua ntej tensile rupture, thaum elongation yog qib ntawm cov yas deformation uas cov khoom tuaj yeem tiv taus ua ntej tensile rupture. Q355 qhia tau hais tias zoo txhua yam khoom nyob rau hauv cov nqe lus ntawm tensile zog thiab elongation.
Seamless steel kav uas siv Q355 steel yog hu ua Q355 seamless steel kav. Cov qauv siv feem ntau suav nrog GB8162 (seamless steel yeeb nkab rau kev siv cov qauv), GB8163 (seamless steel yeeb nkab rau thauj cov kua), GB6479 (seamless steel yeeb nkab rau cov khoom siv chiv) GB9948 (seamless steel yeeb nkab rau roj av tawg), thiab lwm yam.
