Thaum xaiv 400MPa-qib Corten Steel rau cov qauv welded sab nraum zoov, pab pawg engineering feem ntau ntsib ib qho kev sib tw: kev taw qhia ntau qib SMA400 series tau teev tseg hauv JIS G 3114: 2022, thiab nkag siab tias lawv txawv li cas. Thaum txhua qib hauv SMA400 tsev neeg sib faib cov kev faib tawm tseem ceeb xws li kub- dov atmospheric corrosion-resistant welded structural steels, lawv cov ntawv sau npe (BP, A, B, C, W) teeb liab nruj, tus qauv- yuam kom sib txawv ntawm cov tshuaj pleev ib ce, kev ua tau zoo, thiab siv cov xwm txheej. Cov kev sib txawv no cuam tshuam ncaj qha rau qhov project tus nqi them ua ntej, lub neej ua haujlwm ntev -, thiab tsim nyog rau ib puag ncig tshwj xeeb.
1. Chemical Composition: Qhov Sib Txawv Sib Txawv
Qhov cuam tshuam loj tshaj plaws ntawm SMA400BP thiab lwm qib SMA400 series yog nyob rau hauv nws cov alloy formulation, tshwj xeeb tshaj yog nws nyob ze -zero nickel cov ntsiab lus:
SMA400BP: Raws li JIS G 3114: 2022, qib no muaj cov ntsiab lus npib tsib xee siab tshaj plaws ntawm Less tshaj lossis sib npaug li 0.03%, ib qho kev txiav txim siab tsim kom muaj cov nqi siv tau. Nws tso siab rau qhov ruaj khov 0.30-0.50% tooj liab thiab 0.45-0.75% chromium sib xyaw kom xa cov tub ntxhais corrosion kuj rau qhov chaw me me.
Lwm cov qib SMA400: SMA400A/B/C tso cai rau 0.30% npib tsib xee los txhim kho lub zog, thaum lub corrosion-resistant SMA400W (marine/industrial variant) yuav tsum muaj 0.20-0.60% npib tsib xee los txhawb cov tshuaj chloride thiab acidic paug.
Qhov sib txawv no ua rau SMA400BP qis tshaj -up pem hauv ntej- tus nqi qib hauv SMA400 series, thaum siab dua -nickel variants nqa cov khoom hwm rau kev txhim kho hnyav- kev ua haujlwm ib puag ncig.
2. Mechanical Performance & Temperature Limits
Txhua qib SMA400 series sib faib 400–510 MPa tensile lub zog ntau yam, tab sis lawv sib txawv hauv kev cuam tshuam toughness thiab qis -kev ua haujlwm kub, raws li JIS G 3114: 2022:
SMA400BP: Guarantees yam tsawg kawg nkaus 27J Charpy V-notch cuam tshuam toughness ntawm 0 degree, sib piv tus qauv SMA400B qib. Qhov no ua rau nws haum rau cov huab cua sov nrog qee lub sijhawm khov, tab sis tsis yog rau cov xwm txheej tsis tu ncua - xoom.
SMA400A: Tsuas yog yuav tsum tau 27J cuam tshuam qhov tawv ntawm 20 degree, txwv nws kom sov, me me ib puag ncig uas tsis muaj kev pheej hmoo khov.
SMA400C: Muab 27J cuam tshuam rau qhov hnyav ntawm -10 degree, engineered rau cov cheeb tsam nrog lub caij ntuj no ntev.
SMA 400 W: Muab kev sib txuam lossis txhim kho qis -kub toughness, ua ke nrog nws cov alloy- txhawb nqa corrosion.
SMA400BP's thickness- nyob ntawm lub zog tawm los (215–245 MPa) ua raws li qhov dav SMA400 series, ua nws txoj cai- ua raws li cov qauv teeb pom kev zoo- mus rau - nruab nrab load structural designs.
3. Npaj siv Cases & Lifecycle Value
Txhua qib SMA400 series tau ua kom zoo rau cov txheej txheem tshwj xeeb ntawm cov ntawv thov, thiab qhov no yog qhov sib txawv ntawm qhov ua tau zoo tshaj plaws rau pawg haujlwm:
SMA400BP: Tus nqi ntau tshaj -kev xaiv zoo rau tsis yog- siab heev, me me- tej yaam num ib puag ncig, nrog rau cov nyob deb nroog cov neeg taug kev choj railings, suburban architectural framing, toj roob hauv pes qauv, thiab lub teeb muaj lub tsev sab nrauv. Nws muab 25-35 xyoo kev pabcuam lub neej nrog kev saib xyuas tsawg kawg hauv cov chaw no.
SMA400C: Yuav tsum tau ua rau cov dej num hauv cov huab cua txias uas muaj qhov kub thiab txias qis dua -10 degree, qhov twg nws qhov kub tsis tshua muaj zog tiv thaiv kev puas tsuaj.
SMA 400 W: Yuav tsum muaj rau qis- raug cov ntug hiav txwv dej lossis thaj chaw muaj kev lag luam nruab nrab, qhov twg nws cov npib tsib xee- ua kom cov hlau zoo tiv thaiv ntsev thiab kua qaub- tsav corrosion uas yuav ua rau SMA400BP tiv thaiv patina.
SMA400A: Txwv tsis pub -tseem ceeb, sov- kev siv huab cua nrog cov kev xav tau ntawm cov qauv kev ntxhov siab tsawg.
Hauv cov ntsiab lus, SMA400BP sawv tawm ntawm qhov dav SMA400 series raws li tus nqi tshaj plaws - siv tau, dav dav - hom phiaj Corten Steel qib rau cov qauv sab nraum zoov welded, raws li JIS G 3114: 2022. Nws qhov sib npaug, qis-nickel formulation muab kev ntseeg tau zoo rau cov haujlwm uas tsis yog-cov haujlwm hnyav, thaum lwm yam SMA400 qhov sib txawv yog lub hom phiaj- ua rau cov xwm txheej hnyav uas poob sab nraum SMA400BP qhov kev txwv tsim.
