Hauv cov ntsiab lus ntawm cov ntaub ntawv steel, "hauv tsev" feem ntau yog hais txog Suav teb chaws tus qauv (GB qauv).
Cov txheej txheem EuropeanS355JR (EN 10025-2)yog feem ntau ncaj qha sib npaug rau Suav tus qauv Q355B raws li GB / T 1591 tus qauv (High zog qis alloy qauv steels).
Nov yog cov ncauj lus kom ntxaws:
1. Thawj qhov sib npaug:Q355B (GB/T 1591)
Qhov no yog qhov ze tshaj plaws thiab feem ntau siv hauv tsev hloov pauv.
Zoo sib xws:
Yam tsawg kawg nkaus Yield Strength: Ob leeg yog txhais los ntawm qhov tsawg kawg nkaus yield zog ntawm 355 MPa ntawm thicknesses tsawg dua los yog sib npaug rau 16 hli.
Daim Ntawv Thov: Ob qho tib si yog dav dav - lub hom phiaj steels siv hauv kev tsim kho, txuas hniav, tshuab, thiab kev tsim vaj tsev dav dav.
Qib Zoo: Cov lus "JR" hauv S355JR qhia txog kev cuam tshuam ntawm 27 J ntawm +20℃. Lub ntsiab lus "B" hauv Q355B qhia txog kev cuam tshuam ntawm qhov hnyav dua lossis sib npaug rau 34 J ntawm +20℃. Yog li, Q355B tiag tiag muaj qhov yuav tsum tau muaj zog dua me ntsis ntawm chav sov dua S355JR. Rau feem ntau cov ntawv thov, qhov no ua rau Q355B tsim nyog thiab feem ntau sib npaug lossis zoo dua hloov.
Ntsiab Standard:GB / T 1591-2018 (hloov tus qauv Q345 qub).
2. Lwm qhov Kaw GB sib npaug (Cov ntsiab lus-nyob ntawm)
Raws li cov kev cai tshwj xeeb (xws li kev xa khoom lossis cov khoom tshwj xeeb), cov no kuj tseem raug txiav txim siab:
Q355C (GB/T 1591): Yuav tsum muaj kev cuam tshuam toughness ntawm ntau dua los yog sib npaug rau 34 J ntawm 0 degree. Qhov no yog ze rau European S355J0 qib. Siv qhov no yog tias koj tus qauv tsim hu kom zoo dua qis -kub toughness dua S355JR.
Q355D (GB/T 1591): Yuav tsum muaj kev cuam tshuam toughness ntawm ntau dua los yog sib npaug rau 34 J ntawm -20℃. Qhov no yog ze rau European S355J2 qib.
Q355E (GB/T 1591): Yuav tsum muaj kev cuam tshuam toughness ntawm ntau dua los yog sib npaug rau 27 J ntawm -40 degree.
3. Rau Steel Phaj, Lwm Yam Khoom Siv: GB / T 3274
Tus qauv GB/T 3274 (Kub-rolled steel phaj, nplooj ntawv thiab strips rau cov qauv dav dav) kuj suav nrog aQ355Bqib, uas feem ntau ua raws li qhov yuav tsum tau ua hauv GB / T 1591. Cov khoom siv feem ntau raug txiav txim lossis siv raws li tus qauv no rau daim hlau.
4. Cov Lus Cim Tseem Ceeb ntawm Cov Qauv Qub: Q345
Ua ntej GB / T 1591-2018 hloov tshiab, qib tseem ceeb yog Q345, uas muaj lub zog tawm los ntawm 345 MPa. Q355 series tshiab tau qhia kom ua raws li cov qauv thoob ntiaj teb (xws li ISO 630 thiab EN 10025) thiab tau hloov tag nrho Q345 hauv kev qhia tshwj xeeb.
Hauv kev ua lag luam, koj tseem yuav hnov cov neeg hais txog "Q345," tab sis rau kev tsim tshiab thiab kev yuav khoom, Q355 yog qhov tseeb, tam sim no. S355JR yog sib npaug rau Q355B, tsis yog Q345 qub.
Sib piv Summary Table
| Property/Designation | S355JR (EN 10025-2) | Cov khoom siv hauv tsev sib npaug |
|---|---|---|
| Thawj qhov sib npaug | Cov qauv hlau | Q355B (GB/T 1591-2018) |
| Yam tsawg kawg nkaus Yield Strength | 355 MPa (t Tsawg dua lossis sib npaug li 16mm) | 355 MPa (t Tsawg dua lossis sib npaug li 16mm) |
| Tensile zog | 470-630 MPa | 470-630 MPa (Tib qhov ntau) |
| Impact Toughness | 27 J @ +20 degree | Ntau dua lossis sib npaug li 34 J @ +20 degree |
| Daim ntawv thov tseem ceeb | Cov qauv siv dav dav | Cov qauv siv dav dav |
Cov lus qhia xaiv:
Rau kev hloov pauv ncaj qha hauv feem ntau: Qhia Q355B raws li GB / T 1591-2018. Cov khoom siv tshuab yog qhov tseem ceeb sib hloov, nrog Q355B muaj qhov yuav tsum tau ua kom nruj dua.
Yog tias tus qauv tsim tshwj xeeb hu rau qhov tseeb tus nqi ntawm S355JR (+20℃cuam tshuam): Q355B tseem txais tau raws li nws ua tau raws li qhov yuav tsum tau ua. Nws yog tus qauv xaiv.
Rau kev yuav khoom:Qhia meej txog tus qauv thiab qib:GB/T 1591-2018 Q355B. Yog tias nws yog rau daim hlau, koj tuaj yeem siv tauGB/T 3274.
Xaus:Cov khoom siv hauv tsev tus qauv sib npaug rau European S355JR yog Q355B raws li tam sim no Suav teb chaws tus qauv GB / T 1591.