316H stainless hlauyog qhov siab -kev ua tau zoo sib txawv uas tau tsim los rau kev pabcuam kub siab. Qhov no austenitic stainless hlau, tsim los ntawm UNS S31609, yog kev hloov kho ntawm tus qauv 316 qib nrog cov ntsiab lus carbon ntau ntxiv, feem ntau yog li ntawm 0.04% mus rau 0.10%.
Hauv peb lub Hoobkas, peb tsim 316H hauv ntau hom -bars, phaj, kav, thiab ntawv- xyuas kom ua raws li cov qauv xws li ASTM A240 thiab ASME SA240. Kev nkag siab txog nws cov tshuaj lom neeg, lub cev, thiab cov khoom siv tshuab yog qhov tseem ceeb rau cov neeg yuav khoom nrhiav cov khoom siv tau zoo uas xa cov nqi ntev -.
316H Stainless hlau Chemical Composition
Cov tshuaj muaj pes tsawg leeg ntawm 316H stainless hlau yog meticulously sib npaug los txhim kho kev ua tau zoo hauv corrosive thiab siab - qhov kub thiab txias. Cov ntsiab lus tseem ceeb muaj xws li carbon (C) ntawm 0.04-0.10%, manganese (Mn) mus txog 2.00%, silicon (Si) txog 0.75-1.00%, phosphorus (P) Tsawg dua lossis sib npaug li 0.045%, sulfur (S) Tsawg dua lossis sib npaug li 0.030%, chromium (0.030%). (Ni) 10.00-14.00%, thiab molybdenum (Mo) 2.00-3.00%, nrog hlau (Fe) raws li qhov sib npaug.
Cov pa roj carbon qib siab yog qhov ua kom pom tseeb, txhawb nqa carbide nag lossis daus uas txhawb nqa siab - qhov kub thiab txias tab sis yuav tsum tau ua tib zoo kho cua sov kom tsis txhob muaj kev puas tsuaj. Chromium tsim ib txheej oxide passive, tiv thaiv oxidation, thaum npib tsib xee stabilizes cov qauv austenitic, kom ntseeg tau tias tawv tawv txawm nyob rau theem cryogenic.
Molybdenum txhim khu kev tiv thaiv rau chloride-induced pitting thiab crevice corrosion, outperforming 304 qib hauv acidic media. Hauv peb cov txheej txheem tsim khoom, peb nruj tswj hwm cov ntsiab lus no los ntawm lub tshuab nqus tsev melting thiab spectroscopic tsom xam kom txo qis impurities, ua rau cov khoom uas tiv thaiv degradation nyob rau hauv ib puag ncig uas muaj halides, acids, thiab alkalis.
Hauv cov nroj tsuag tshuaj, 316H tiv taus sulfuric, phosphoric, thiab acetic acids zoo dua li qis dua - molybdenum alloys, txo qis qis thiab hloov zaus. Piv txwv li, phosphorus thiab sulfur yog capped los txhim kho weldability thiab tiv thaiv kub tawg thaum lub sij hawm fabrication.
Zuag qhia tag nrho, cov khoom siv tshuaj lom neeg ntawm 316H tso nws raws li tus nqi - kev xaiv zoo rau cov ntawv thov uas tus qauv 316 yuav ua rau muaj kev ntxhov siab, muab kev sib xyaw ua ke ntawm kev ua haujlwm ntev thiab ntau yam uas peb cov neeg siv khoom hauv Tebchaws Europe thiab North America tsis tu ncua qhuas.
316H Stainless hlau lub cev muaj zog
316H stainless hlau nthuav tawm cov khoom siv lub cev uas txhawb nqa nws txoj kev siv hauv kev xav tau thiab kev siv thermally sib txawv. Nws qhov ceev yog kwv yees li 7.98-8.00 g / cm³. Lub melting ntau spans 1370-1400 degree, cia nws tswj kev ncaj ncees nyob rau hauv furnaces thiab boilers yam tsis softening ntxov ntxov.
Thermal conductivity sawv ntawm txog 16.3 W / m·K ntawm chav tsev kub, ua kom yooj yim hloov cov cua sov hauv cov khoom sib hloov thiab cov kav dej. Lub coefficient ntawm thermal expansion yog 16.0-18.0 × 10⁻⁶ /℃los ntawm 20 mus rau 1000 degree, uas yog ruaj khov thiab minimizes warping thaum lub sij hawm thermal cycling. Hluav taws xob tiv thaiv ntsuas nyob ib ncig ntawm 74 µΩ·cm ntawm 20 degree, pab tau rau cov ntawv thov uas cuam tshuam nrog electromagnetic teb. Lub peev xwm tshwj xeeb kub yog 500 J / kg·K, pab txhawb lub zog nqus tsis muaj qhov kub ceev.
Nyob rau hauv peb lub Hoobkas, peb leverage cov cwj pwm no los tsim precision Cheebtsam uas outperform cov neeg sib tw nyob rau hauv thermal stability. Piv txwv li, nws qis magnetic permeability suits nws rau rhiab instrumentation.
316H Stainless Hlau Mechanical Properties
Kev ua haujlwm zoo ntawm 316H stainless hlau yog qhov ua rau nws sib nrug heev, tshwj xeeb tshaj yog nyob rau hauv siab - kev ntxhov siab, siab - qhov kub thiab txias. Nyob rau hauv chav tsev kub, nws boasts ib tug tsawg kawg nkaus tensile zog ntawm 515 MPa (75 ksi) thiab yield zog ntawm 205 MPa (30 ksi), nrog elongation ntawm tawg tshaj 40% thiab hardness mus txog 95 HRB los yog 217 HB. Lub modulus ntawm elasticity yog kwv yees li 200 GPa, qhia zoo heev nruj.
Dab tsi ntxias ntau tus neeg siv khoom yog nws qhov kev nkag siab zoo tshaj plaws thiab lub zog tawg ntawm qhov kub siab tshaj 500 degree. Piv txwv li, ntawm 650 degree, creep lub zog tseem muaj zog vim muaj cov ntsiab lus carbon ntau dua, uas ua rau muaj zog carbides. Qhov no sib piv nrog 316L, qhov twg cov pa roj carbon qis qis siab -kub endurance. Kev qaug zog kuj tseem ceeb, nrog rau kev txwv tsis pub muaj kev txhawb nqa cyclic loading hauv turbines thiab reactors.
Nyob rau hauv cov xwm txheej annealed, 316H muaj qhov sib npaug ntawm ductility thiab lub zog, tso cai rau kev ua haujlwm txias kom ntxiv cov txiaj ntsig tsis muaj brittleness. Peb lub Hoobkas cov txheej txheem kho cua sov- kev daws teeb meem annealing ntawm 1040-1100℃ua raws li sai quenching-optimize cov khoom no, kom ntseeg tau tias cov microstructure zoo ib yam.
Los ntawm kev xaiv 316H, kev lag luam ua tiav cov txiaj ntsig kev nyab xeeb zoo dua, vim tias nws cov khoom siv ruaj khov tiv thaiv kev puas tsuaj loj, txhais rau cov txiaj ntsig kev lag luam zoo li kev ncua sij hawm ntawm kev tshuaj xyuas thiab kho.
316H Stainless hlau Corrosion Resistance
Corrosion kuj yog lub hauv paus pob zeb ntawm 316H, txhim kho los ntawm molybdenum thiab chromium. Nws excels tiv thaiv pitting thiab crevice corrosion nyob rau hauv chloride ib puag ncig, nrog ib tug PREN nyob ib ncig ntawm 25-30, superior rau 304's. Nyob rau hauv acidic media xws li sulfuric acid mus txog 20% concentration, nws tuav passivity mus txog rau boiling ntsiab lus.
Txawm li cas los xij, cov pa roj carbon ntau dua tuaj yeem ua rau rhiab heev yog tias tsis zoo annealed, uas ua rau muaj kev cuam tshuam ntawm intergranular corrosion nyob rau hauv weld aav. Peb qhov kev tsim khoom txo qhov no los ntawm kev tswj kom txias thiab xaiv kom ruaj khov.
Qhov kev tiv thaiv no yaum kom tau txais kev coj ua hauv marine, tshuaj, thiab kev ua zaub mov, qhov twg muaj kev pheej hmoo kis kab mob siab heev . 316H lub peev xwm los tiv thaiv hypochlorites, brine, thiab sulfites yam tsis muaj degradation ua kom lub neej ntev, ua kom pom tseeb, tus nqi -txuag kev txhim kho dua cov hlau tsis muaj zog.
316H Stainless hlau High -Tsub Ua Haujlwm
Ntawm qhov kub siab, 316H cov khoom ci ci, nrog oxidation tsis kam mus txog 900℃hauv kev pabcuam txuas mus ntxiv thiab 925℃tsis tu ncua. Luv -lub sij hawm creep zog tshaj 316, zoo tagnrho rau boilers thiab tso pa system.
Qhov kev ua tau zoo no yog txhawb rau kev tsim hluav taws xob, qhov kev ntseeg siab nyob rau hauv tshav kub tiv thaiv kev tawm tsam.
Raws li tus thawj tswj hwm cov khoom lag luam uas tau saib xyuas ntau txhiab tons ntawm 316H ntau lawm thiab xa mus rau cov neeg siv khoom thoob ntiaj teb, kuv tuaj yeem lees paub tias cov khoom siv no tsis tu ncua ntawm nws cov lus cog tseg thaum ua tiav thiab ua tiav.
