ASTM A179 seamless steel tubes yog txias-kos qis- cov pa roj carbon seamless steel raj tsim tshwj xeeb rau cov khoom siv hluav taws xob hloov pauv xws li cov khoom siv hluav taws xob thiab cov condensers raws li American tus qauv system. Vim lawv zoo heev machinability thiab mechanical zog, lawv yog dav siv nyob rau hauv industrial teb. Cov txheej txheem steel hlau no yog tsim los siv cov txheej txheem txias - kos duab, nrog txoj kab uas hla ntawm 3.2 txog 76.2 hli thiab phab ntsa tuab qhov tseeb txog 0.1 hli. Lawv tsis muaj oxide txheej ntawm cov phab ntsa sab hauv lossis sab nrauv, qhov chaw ua tiav siab, tuaj yeem tiv taus siab yam tsis muaj qhov to, thiab tsis deform thaum txias - khoov. Lawv kuj tsis muaj qhov tawg thaum flared los yog flattened, ua tau raws li qhov yuav tsum tau ua ntawm high - khoom siv precision.
Hais txog tshuaj muaj pes tsawg leeg, ASTM A179 nruj me ntsis tswj cov ntsiab lus carbon (0.06%-0.18%), manganese cov ntsiab lus (0.27%-0.63%), thiab sulfur thiab phosphorus impurities tsawg dua los yog sib npaug rau 0.035%, xyuas cov khoom purity.
Hais txog cov khoom siv kho tshuab, nws muaj lub zog tensile Ntau dua lossis sib npaug ntawm 325MPa, tawm lub zog ntau dua lossis sib npaug ntawm 180MPa, elongation Ntau dua lossis sib npaug li 35%, thiab hardness tsawg dua lossis sib npaug rau 72HRB. Nws tuaj yeem ua haujlwm ruaj khov nyob rau hauv qhov ntsuas kub ntawm -50℃txog 450 degree, ua rau nws tshwj xeeb tshaj yog haum rau siab -kub, high-pressure steam systems.
Nyob rau hauv cov nqe lus ntawm kev tsim cov txheej txheem, tom qab qhov kawg txias txias, cov yeeb nkab steel tau txais kev kho cua sov ntawm qhov kub siab tshaj 650℃kom tshem tawm kev ntxhov siab thiab txhim kho microstructure (ferrite + pearlite). Thaum lub sijhawm tsim khoom, nws dhau los ua ntau yam kev sim, suav nrog kev sim flattening, flaring tests, thiab hydrostatic tests, kom ntseeg tau tias txhua cov yeeb nkab ua tau raws li tus qauv yuav tsum tau ua.
Hais txog cov chaw siv, ASTM A179 seamless steel yeeb nkab yog cov khoom siv rau kev lag luam xws li boilers, tshuaj, thiab roj thiab roj. Hauv cov tshuab boiler, nws qhov siab - kub thiab siab - siab ua haujlwm kom ntseeg tau tias muaj kev sib pauv cua sov; nyob rau hauv kev lag luam tshuaj, nws zoo heev corrosion kuj ua rau nws haum rau conveying acids thiab alkalis; nyob rau hauv cov roj thiab roj tsheb thauj mus los, nws txoj kev sealing siab txo qhov kev pheej hmoo ntawm kev xau. Tsis tas li ntawd, cov yeeb nkab steel no tseem tuaj yeem siv los tsim cov khoom siv kho tshuab xws li hydraulic lub tog raj kheej thiab lub tes tsho bearing, ua kom pom tias nws hloov tau mus rau ntau yam xwm txheej.