Lub complexity ntawm cov khoom hloov
Ib qho kev xav tsis zoo yog tias "qhov sib piv lub zog" lav kev pom zoo. Hauv kev muaj tiag, cov txheej txheem xa cov ntaub ntawv yog qhov nruj dua. Regulators thiab thib peb- tog tshuaj ntsuam xyuas (TPI) cov tuam txhab yuav tsis muab qhov sib npaug raws li lub zog tawm los. Lawv qhov kev ntsuam xyuas tsom mus rau:
tsis sib xws ntawm cov qauv khoom;
chemical muaj pes tsawg leeg ua raws;
Charpy V-notch cuam tshuam qhov tseem ceeb;
los ntawm-thickness (Z-direction) cov khoom;
weldability (CEV/Ceq);
traceability ntawm Material Test Certificate (MTC);
kev tso cai ntawm "cov khoom sib npaug" hloov;
xav tau kev pom zoo rau engineer / kws pab tswv yim;
qhov yuav tsum tau rov xa cov qauv kev suav.
Kev ntsuas tseem ceeb rau kev hloov khoom siv
Yield zog
Thickness -nyob ntawm;tshuaj xyuas nominal thickness, thickness intervals, tiag MTC cov qhabnias thiab tsim tawm los Fy, yeej tsis cia siab rau lub npe qeb ib leeg.
Tensile zog
Qee qib sib piv cov txiaj ntsig zoo sib xwstab sis txawv ntawm UTS ntau yam, elongation thiab chemistry.
Elongation
Tseem ceeb rauseismic daim ntaub ntawv, txuas hniav, pej xeem vaj tse, ntev -span lug, dynamic loads thiab qaug zog-sensitive Cheebtsam.
Tshuaj muaj pes tsawg leeg
C, Mn, P, S, Si, CEV and micro-alloyingcuam tshuam weldability, txias dabtsi yog khoov, cuam tshuam toughness, HAZ zog thiab lamellar-tearing txaus ntshai.
CVN cuam tshuam lub zog
Qhov teeb meem tseem ceeb tshaj plawsrau Q235/Q355 sib npaug hauv EN, AS lossis Hong Kong tej yaam num; hla-qhia Q355B/C/D/E tawm tsam S355 sub- qib sib thooj ntawm qhov xav tau qhov kub thiab lub zog.
Los ntawm -thickness Property
Hnyav daim hlau,kem kem, hloov trusses, gusset daim hlau thiab siab -cov pob qij txha nruj feem ntau yuav tsum tau Z15/Z25/Z35; tus qauv Q355B tsis tau txais qhov twg Z- qhov zoo yog teev.
Weldability
Kev hloov pauv yuav tsum tau rov- ntsuas cov ntaub ntawv vuam; kev pom zoo yog khi rau WPS thiab PQR.
MTC & Traceability
Cov ntaub ntawv pov thawj yog yuav tsum tau:MTC, kub tooj, batch naj npawb, phaj tooj, chemistry, mechanical results, Charpy results, EN 10204 3.1/3.2 certification, TPI tim khawv reports and a traceability matrix.
Q235 puas tuaj yeem hloov ASTM A36?
Lub zog muaj zog sib piv tab sis tsis muaj qhov sib npaug: ASTM A36 yam tsawg kawg nkaus tawm los yog 36 ksi (≈250 MPa) thaum Q235 yog 235 MPa - Q235 qis dua me ntsis. Q235B tsis pom zoo los ua tus hloov ncaj qha thaum A36 tau teev meej meej; Kev hloov pauv yuav tsum tau pom zoo los ntawm Tus Kws Lij Choj Cov Ntaub Ntawv (EOR) / tus neeg siv khoom los ntawm kev xa khoom sib npaug.
Tsis pom zoo rau:
- Primary beams/main girders
- Cov kab
- Gusset daim hlau
- Daim phiaj
- Bracing
- Crane girders
- Seismic-force-resisting cov tswv cuab
- Cov tswv cuab nruj
Tej zaum yuav ua tau rau:
- Cov tswv cuab thib ob
- Kev sib txuas me me fittings
- Ib ntus bracings
- Tsis yog -piv txwv load- bearing ntsiab
- Qhov twg qhov sib npaug tau tso cai meej meej thiab cov qauv kuaj xyuas tseem ua raws
Q355 puas tuaj yeem hloov ASTM A572 Qib 50?
Q355 (min yield 355 MPa) yog piv rau A572 Gr. 50 (50 ksi ≈ 345 MPa). Txawm li cas los xij, Q355 tsis tuaj yeem tsuas yog kho raws li qhov sib npaug ncaj qha:
Kev txwv tshuaj lom neeg sib txawv ntawm ASTM thiab GB;
CVN cuam tshuam qhov yuav tsum tau sib txawv;
Qhov yuav tsum tau ua ntawm kev xeem sib txawv;
Tej yaam num yuav tswj tau ASTM- ntawv pov thawj steel;
Lub hauv paus- pawg hlau rau WPS/PQR kev tsim nyog txawv;
Kev lees txais los ntawm PE / EOR yog tswj hwm los ntawm cov phiaj xwm kev qhia tshwj xeeb.
Cov Lus Qhia Xaiv Q355 Cov Qib Zoo
|
Daim ntawv thov |
Qib pom zoo |
|---|---|
|
Main rigid thav duab rau standard industrial vaj tse |
Q355B (qis qis qis) |
|
Tsawg- kub lossis cuam tshuam - qhov yuav tsum tau ua kom muaj zog |
Q355C / Q355D |
|
Tseem ceeb welded kev sib txuas / pob qij txha |
Q355C / Q355D |
|
Hnyav / tuab phaj sib txuas |
Q355C / Q355D + Z-kev taw qhia (Z15/Z25/Z35) |
|
Cov choj, pej xeem vaj tse, seismic cov tswv cuab |
nruj me ntsis raws li qhov project specification; qhov chaw thawj ASTM qib yog tias tsim nyog |
Daim Ntawv Qhia Txog Kev Hloov Pauv
|
Cov khoom qub |
Cov neeg sib tw hauv tsev |
Kev pom zoo |
Kev sau ntawv |
|---|---|---|---|
|
ASTM A36 |
Q235B/C |
Cov xwm txheej |
Yield marginal / qis dua; tsis pom zoo rau thawj cov tswv cuab |
|
ASTM A36 |
Q355B/C |
Pom zoo |
Siab dua - zog hloov; qhia meej txog kev sib txuas / thauj khoom-txoj kev cuam tshuam |
|
ASTM A572 Gr 1. |
Q355B/C/D |
Pom zoo (standard) |
Txheeb xyuas CVN thiab rov- tsim nyog WPS/PQR |
|
ASTM A992 Cov Lus Qhia Tshwj Xeeb |
Q355 / Q420 |
ceev faj heev |
nruj AISC kev cai rau cov duab |
|
TS EN S275 |
Q355B/C |
Pom zoo |
Ua raws li CE / UKCA thiab EN 1090 |
|
EN S355JR |
Q355B/C |
Pom zoo |
Tshawb xyuas 20℃Charpy thiab tag nrho MTC traceability |
|
EN S355J0 |
Q355C/D |
Pom zoo |
Yuav tsum tau ua pov thawj ntawm 0℃CVN |
|
EN S355J2 |
Q355D/E |
Pom zoo |
Yuav tsum tau ua pov thawj ntawm -20℃CVN |
|
AS/NZS Qib 300 |
Q355B/C |
Pom zoo |
Rigorous ITP thiab ywj siab TPI ua raws |
|
AS/NZS Qib 350 |
Q355C/D |
Pom zoo |
Tshawb xyuas CVN, cov txheej txheem vuam, cua sov-ntaus traceability |
|
S355 (Hong Kong tej yaam num) |
Q355C/D |
Pom zoo |
Lub Tsev Haujlwm Saib Xyuas Kev Ua raws cai, tus kws pab tswv yim pom zoo, kev xa tawm |
Xaus
Kev hloov steel tsis yog ib qho yooj yim lub zog -raws li kev hloov - nws yog ib tug txheej txheem kev pom zoo. Pib ntsuam xyuas qhov sib npaug thaum ntxov, npaj ua tiav MTC thiab cov ntaub ntawv xeem, thiab tau txais kev pom zoo ntawm tus kws ua haujlwm / tus neeg siv khoom ua ntej tsim khoom. Qhov twg tus qauv tsim ua tus thawj ASTM lossis EN qib thiab kev pom zoo tsis paub meej, qhov chaw qhia qib ncaj qha.
Raws li tus kws tshaj lij cov khoom lag luam steel nrog kev paub dhau los hauv kev pom zoo thoob ntiaj teb cov khoom siv, peb tuaj yeem hloov kho tag nrho cov ntaub ntawv sib npaug ntawm cov ntaub ntawv ntsuam xyuas rau koj, suav nrog cov ntaub ntawv xeem sib piv, MTC cov ntaub ntawv txheeb xyuas, WPS / PQR cov lus qhia sib txuam thiab cov ntaub ntawv xa tawm los pab koj ua haujlwm zoo dhau los ntawm engineer thiab thib peb - tog kev pom zoo. Yog tias koj ntsib kev tsis sib haum xeeb ntawm kev hloov qib steel rau koj qhov project, thov koj xav tiv tauj nrog peb pab neeg ua haujlwm rau ib qho - nres kev txhawb nqa.
Hu rau tam sim no kom tau txais kev sib tham txog kev sib npaug ntawm cov khoom pub dawb
Qhov txawv ntawm Q235 thiab Q355 steel yog dab tsi?
Q235 yog qib qis tshaj ntawm cov hlau thiab yog hom siv ntau tshaj plaws hauv kev tsim kho kev lag luam. Nws feem ntau yog siv rau cov kab teeb lossis cov kab uas tsis raug rau cov kev ntxhov siab loj lossis cov khoom hnyav. Q355 muaj zog dua Q235 thiab tuaj yeem siv rau hauv cov xwm txheej uas muaj kev ntxhov siab ntau dua lossis hnyav hnyav.
Dab tsi yog qhov txawv ntawm A36 thiab S355 steel?
S355JR cov txiaj ntsig siab dua thiab lub zog tensile ua rau nws zoo dua rau kev thov cov ntawv thov, thaum A36 ua tau zoo ntawm tus nqi- siv tau, qis- cov xwm txheej ntxhov siab. S355JR qhov tshwj xeeb cuam tshuam qhov hnyav ua rau nws muaj kev cuam tshuam hauv European qauv, qhov twg A36 yuav xav tau kev sim ntxiv rau qis - siv kub.