Nyob rau hauv industrial sectors xws li cov hlab ntsha siab, boilers, thiab cia tanks,A516 Gr.70yog cov khoom siv feem ntau hais txog qib. Txawm li cas los xij, thaum muaj kev sib tham txog engineering, cov lus nug feem ntau tshwm sim: Puas yog A516 Gr.70 carbon steel lossis stainless hlau?
Qhov tseeb, nws tsis yog stainless hlau tab sis yog carbon-manganese steel tshwj xeeb tsim rau nruab nrab- mus rau - qis- cov hlab ntsha kub siab, ua raws li ASTM / ASME cov qauv. Nrog nws cov tshuaj muaj pes tsawg leeg thiab cov khoom sib npaug, cov khoom siv no tau dhau los ua cov khoom tseem ceeb hauv petrochemical, lub zog, thiab lwm yam lag luam. Nws cov yam ntxwv thiab daim ntawv thov tus nqi yog cov hauv paus hauv paus hauv cov khoom muaj txiaj ntsig ntawm carbon steel.
Cov muaj pes tsawg leeg ntawm A516 GR70 yog raws li hlau thiab carbon, poob nyob rau hauv qeb ntawm cov pa roj carbon steel. Nws tsis muaj cov ntsiab lus siab chromium thiab nickel tseem ceeb rau stainless hlau. Raws li ASTM A516 cov qauv, nws cov ntsiab lus carbon yog capped ntawm 0.27%, thaum cov ntsiab lus manganese tswj ntawm 0.85% thiab 1.20%. Kev phom sij tsis zoo xws li phosphorus (tsawg dua lossis sib npaug li 0.025%) thiab sulfur (tsawg dua lossis sib npaug rau 0.025%) yog nruj me ntsis txwv. Qhov no tsawg-carbon, siab{13}}manganese muaj pes tsawg leeg ua kom zoo weldability thaum txhim kho lub zog thiab tawv los ntawm manganese. Tsis tas li ntawd, cov nyhuv deoxidizing ntawm silicon thiab cov nplej- ua kom zoo ntawm aluminium tsim kom muaj kev sib npaug ntawm lub hauv paus. Nws cov pa roj carbon sib npaug (CEV) tsawg dua lossis sib npaug li 0.45, qis dua qhov siab ntawm -lub zog alloy steels, tshem tawm qhov xav tau rau cov txheej txheem vuam nyuaj los tiv thaiv kev pheej hmoo tawg.
Mechanical Properties
A516 GR 70 nthuav tawm lub zog tensile ntawm 485-620 MPa thiab lub zog tawm los ntawm tsis pub tsawg dua 260 MPa, muab tso rau hauv nruab nrab - mus rau - qib siab zog hauv cov pa roj carbon steel. Nws qhov qis- qhov kub thiab txias yog qhov tseem ceeb tshwj xeeb, ua tiav Charpy V-qhov cuam tshuam lub zog ntawm 27 J ntawm -29℃. Tom qab normalizing kev kho mob, qis - qhov kub thiab txias kev ua haujlwm txuas mus rau -46℃. Cov yam ntxwv no ua rau nws haum rau nruab nrab-rau-tsawg kub daim ntaub ntawv. Thaum tsis muaj kev tiv thaiv corrosion ntawm passivation films pom nyob rau hauv stainless hlau, nws nruj tswj ntawm leej faj thiab phosphorus cov ntsiab lus muab kev tiv thaiv zoo heev rau hydrogen-induced cracking thiab sulfide corrosion, ua tau raws li qhov xav tau ntawm cov tshuaj ua ib puag ncig.
Stainless hlau cia siab rau ntau tshaj 18% chromium thiab 8% npib tsib xee los ua ib zaj duab xis passivation, muab kev tiv thaiv corrosion deb tshaj A516 GR 70. Txawm li cas los xij, nws los nrog cov nqi siab thiab yuav tsum tau muab cov ntaub ntawv tshwj xeeb rau vuam. A516 GR 70, raws li cov pa roj carbon steel, tus nqi tsuas yog ib -thib peb rau ib -ib nrab ntawm 304 stainless hlau. Nws boasts superior weldability, ua rau nws zoo tagnrho rau loj - teev siab nkoj vuam thiab manufacturing. Nyob rau hauv daim ntawv thov scenarios, stainless hlau yog feem ntau siv nyob rau hauv cov sectors xws li cov khoom noj thiab kev kho mob qhov twg stringent huv huv thiab corrosion kuj yog qhov tseem ceeb. A516 GR 70, txawm li cas los xij, tsom rau qhov nruab nrab- mus rau- qhov kub thiab txias, siab - cov xwm txheej siab - xws li LPG cia tso tsheb hlau luam hauv cov nroj tsuag petrochemical, cov cuab yeej pabcuam hauv cov chaw nres tsheb hluav taws xob nuclear, thiab cov khoom sib cais cryogenic -ua tau raws li cov kev xav tau ntawm kev lag luam rau ob qho tib si muaj zog thiab tus nqi.
Cov qauv nruj nruj hauv cov ntawv thov kev lag luam
A516 GR 70 yuav tsum ua raws li ASME BPVC Tshooj VIII Siab Vessel Siv Txoj Cai. Ua ntej ua zaub mov xa tuaj, nws tau txais kev tshuaj ntsuam xyuas tag nrho nrog rau kev kuaj ultrasonic thiab Charpy cuam tshuam kev kuaj. Cov phaj siab tshaj 1.5 nti hauv tuab yuav tsum tau kho kom zoo rau cov qauv nplej. Rau qhov xav tau ib puag ncig xws li kev tsim hluav taws xob sab nrauv thiab cov nroj tsuag thee, cov khoom siv SA516 Gr70 (HIC) hydrogen- cov phaj resistant ntxiv txo cov sulfur thiab phosphorus cov ntsiab lus los txhim kho corrosion kuj thaum khaws cov pa roj carbon steel lub hauv paus thiab cov nqi zoo.
Raws li tus neeg sawv cev ntawm cov pa roj carbon-manganese steel, A516 GR 70 ua tiav qhov kev pom zoo ntawm qhov sib npaug ntawm lub zog, toughness, thiab weldability ntawm lub hauv paus carbon steel. Thaum tsis muaj kev tiv thaiv corrosion ntawm stainless hlau, nws cov kev tswj xyuas muaj pes tsawg leeg thiab cov txheej txheem optimization ua rau nws irreplaceable nyob rau hauv nruab nrab - mus rau - qis - kub siab lub nkoj daim ntawv thov. Paub txog nws cov pa roj carbon steel xwm ua rau cov ntawv thov sib piv, tag nrho leveraging nws kev ruaj ntseg kev ruaj ntseg thiab economic efficiency nyob rau hauv industrial ntau lawm.
Yog tias koj tsis paub yuav ua li cas xaiv cov hlau phaj tsim nyog, thovqhia koj cov kev xav tau. Peb muab cov kev daws teeb meem customized.
