Q235b yog ib qho kev siv roj carbon ntau thiab dav hlau cov qauv hlau hauv Suav teb, teev hauv qab tus qauvGB / T 700-2006Cov. Tus "Q" sawv rau cov txiaj ntsig tau (tawm los lub zog)
Cov kav dej ua los ntawm Q235B yog ib txwm tsim uaWelded Hlau Kav(piv txwv li, erw, lsaw, ssaw kav). Lawv tsis tshua muaj cov kav dej seamless, raws li cov kav dej seamless feem ntau yuav tsum tau nyiaj ntau dua 20 # lossis 16mn.
Cov yam ntxwv tseem ceeb:
Zoo plasticity thiab toughness:Haum rau kev tsim thiab vuam.
Lub zog nruab nrab:Qhov zoo tagnrho rau cov ntawv thov cov ntawv thov uas tsis muaj kev thauj khoom hnyav heev.
Zoo heev Weldability:Yuav muab tau yooj yim welded siv txhua txoj kev txheem.
Tus nqi -}} Ua tau zoo:Ib qho ntawm cov kev xaiv steel feem ntau muaj.
1. Tshuaj lom neeg sib xyaw (GB / T 700-2006)
Cov lus hauv qab no qhia txog qhov feem pua siab tshaj plaws ntawm cov khoom siv los ntawm qhov hnyav:
| Lub ntsiab | Carbon (c) | Silicon (si) | Manganese (mn) | Phosphorus (p) | Sulphur (s) |
|---|---|---|---|---|---|
| Cov ntsiab lus% (Max) | 0.20% | 0.35% | 1.40% | 0.045% | 0.045% |
| Hais txog | Impurity (teeb meem) | Impurity (teeb meem) |
Nco tseg: Cov ntsiab lus ntawm arsenic (li) thiab cov ntsiab lus uas tseem tshuav kuj tseem yuav txwv.
2. Cov Khoom Siv Neeg Kho Tshuab
Cov khoom siv mechanories yog cov tub ntxhais tsis paub meej cov qib kawm no.
| Ntiag tug | Paib lub zog (rov qab) | Lub zog tensile (RM) | Elongation (a) | Kev Cuam Tshuam Lub Zog (KV) @ 20 degree |
|---|---|---|---|---|
| Tus nqi (min) | Ntau dua los yog sib npaug rau 235 MPa | 370 - 500 mpa | Ntau dua los yog sib npaug rau 26% | Ntau dua los yog sib luag rau 27 joules |
| Kuaj Tus Qauv | GB / T 2288.1 | GB / T 2288.1 | GB / T 2288.1 | GB / T 229 |
* Nco tseg: lub tensile lub zog ntau (370-500 mpa) yog ib qhov yuav tsum tau ua. Tus nqi tiag tiag yuav tsum muaj ntau dua 370 MPa tab sis tsawg dua 500 MPA los xyuas kom muaj kev tsim nyog. *
3. Cov lus qhia tshwj xeeb thiab qhov ntev (GB / T 3091-2015, GB / T 21835-2008)
Q235b welded kav yog muaj nyob rau hauv ntau qhov ntau thiab tsawg.
| Chaw ua uas tsis tau haus | Cov Khoom Nquag Yog | Cov Qauv Txheej Txheem |
|---|---|---|
| Sab Nraum Incha (OD) | ½ "(21.3mm) rau 96" (~ 2400mm +) | Feem ntau yog los ntawm 20mm txog 2000mm |
| Phab Ntsa Thickness (Wt) | 1.0mm rau 25.4mm (1 ") thiab saum toj no | Sib txawv nrog cov kab uas hla thiab cov txheej txheem |
| Qho ntev | Random (5m-12m) lossis taag ntev (6m, 12m) | Raws li cov neeg siv khoom xav tau |
| Cov txheej txheem tsim khoom | Hlob(Hluav taws xob tiv thaiv welded),Lsaw(Ntev submerged arc welded),Tussaw(Muab kauv submerged arc welded) |
Piv txwv li cov rooj loj (ERW cov yeeb nkab):
| Nominal bore (nps) | Sab Nraum Incha (OD) | Phab Ntsa Thickness Sijhawm (Wt) |
|---|---|---|
| ½ nti | 21.3 hli | 2.0 hli, 2.6 hli, 3.2 hli |
| 1 nti | 33,4 hli | 2.6 hli, 3.2 hli, 4.0 hli |
| 2 nti | 60.3 hli | 2.6 hli, 3.2 hli, 4.0 hli |
| 4 nti | 114.3 hli | 3.2 hli, 4.0 hli, 5.0 hli, 6.3 hli |
| 8 Nti | 219.1 hli | 4.0 hli, 5.0 hli, 6.3 hli, 8.0 hli |
| 12 Nti | 323.9 HLI | 5.0 hli, 6.3 hli, 8.0 hli, 10.0 hli |
4. Cov Qauv thiab Cov Kev Siv
| Daim Ntawv Thov Kev Thov | Cov Qauv Suav Suav | Sib npaug rau cov qauv sib npaug (zoo sib xws) | Thawj siv |
|---|---|---|---|
| Tsawg -} cov kua kub thauj | GB / T 3091 | ASTM A53 Gr. B (ceeb toom 1) | Dej, roj, huab cua, cua sov tshuab |
| Cov qauv dav dav | GB / T 6728(Square / duab plaub) | ASTM A500 GR. B / C (Ceeb Toom 2) | Cov txheej txheem tsim, txhawb nqa qauv, laj kab |
| Fencing, handrails | GB / T 3091, GB / T 6728 | - | Guardrets, Scaffolding (tsis - tseem ceeb) |
Cov ntawv tseem ceeb ntawm cov sib npaug:
NCO TSEG 1:Thaum feem ntau piv,Q235B tsis yog qhov sib npaug rau ASTM A53 Gr. BCov. A53 Gr. B muaj qhov ntau dua cov txiaj ntsig ib lub zog (ntau dua lossis sib npaug nrog 240 MPa vs {}} mpa} mpa mpa} mpa} mpa) thiab cov kev cai sib txawv (piv txwv li, siab dua cu cov ntsiab lus). Lawv yog, txawm li cas los xij, siv nyob rau hauv cov ntawv thov sib xws.
NCO 2: ASTM A500 GR. Byog tus qauv rau cov qauv tubing thiab muaj cov khoom sib txawv cov khoom ntiag tug dua Q235b. Lawv tsis yog ncaj ncaj sib npaug tab sis pab cov hom phiaj zoo sib xws.
5. Kev sib piv nrog lwm cov qib kawm
| Teem nqi | Lub hom phiaj | Min paib zog | Qhov tseem ceeb sib txawv |
|---|---|---|---|
| Q235B | GB / T 700 | 235 MPa | Cov qauv hlau, zoo rau vuam. |
| Q355B | GB / T 1591 | 355 MPa | Lub zog siab dua qis -} allloy steel. Hloov qub Q345b. |
| 20# | GB / T 699 | 245 MPa | "High {{- Zoo" cov pa roj carbon, zoo dua rau kev machining / seamless kav dej. |
| ASTM A53 Gr. B | ASTM A53 | 240 MPa | Int'l Txuj ci rau cov kua tsheb thauj, sib txawv me ntsis chemistry. |
Lub ntsiab
Q235B Steel Yeeb Nkabyog ib qho ntau yam, kev lag luam, thiab yooj yim muaj cov khoom lag luam tsis zoo thiab cov ntawv thov cov kev siv dav dav uas muaj zog tsis yog qhov kev txhawj xeeb tseem ceeb. Nws cov khoom lag luam zoo heev thiab cov qauv tsim ua nws cov khoom siv hauv kev tsim kho thiab cov phiaj xwm hauv Suav teb thiab ntau lub tebchaws. Nco ntsoov paub meej tias cov qauv tshwj xeeb (piv txwv li, GB / T 3091) Thaum xaj kom ntseeg tau qhov tsis zoo thiab kev xeem tau raug kuaj rau koj qhov project.
