Brass C44300, tseem hu ua admiralty brass lossis naval tooj dag, muaj 60% tooj liab, 40% zinc, thiab tin. Cov ntsiab lus tin, uas muaj li ntawm 0.1% mus rau 0.5%, txhim kho cov hlau tsis kam tiv thaiv corrosion, tshwj xeeb tshaj yog nyob rau hauv marine ib puag ncig. Qhov tseeb muaj pes tsawg leeg ntawm tooj dag C44300 tuaj yeem sib txawv nyob ntawm cov chaw tsim khoom, tab sis nws feem ntau ntog nyob rau hauv ntau yam uas tau hais ua ntej.
| Lub ntsiab | Cov ntsiab lus (%) |
|---|---|
| Cu | 71 |
| Sn | 1 |
| Zn | 28 |
Brass C44300 muaj lub cev zoo thiab txhua yam khoom, suav nrog lub zog siab, hnav tsis kam, thiab machinability. Nws qhov ceev yog nyob ib ncig ntawm 8.53 g / cm3, thiab nws cov ntsiab lus melting yog kwv yees li 890 degree.
| Cov khoom | Metric | Imperial |
|---|---|---|
| Qhov ntom | 8.53 g / cm²3 | 0.308 lb/in³ |
Brass C44300 muaj lub zog tensile ntawm 300 MPa thiab lub zog tawm ntawm 70 MPa. Nws kuj muaj cov coefficient tsawg ntawm thermal expansion thiab siab thermal conductivity.
| Cov khoom | Metric | Imperial |
|---|---|---|
| Thermal expansion co-efficient (@20-300 degree /68-572 degree F) | 20.2 µm / m degree | 11.2 µin / hauv degree F |
| Thermal conductivity (@20 degree / 68 degree F) | 110 W/mK | PEB 763 BTU in/hr.ft². degree F |
Brass C44300 feem ntau yog siv rau hauv marine daim ntaub ntawv vim nws zoo heev corrosion kuj. Nws kuj yog siv nyob rau hauv tshav kub exchangers, condensers, li qub, thiab fittings vim nws siab thermal conductivity thiab machinability. Lwm daim ntawv thov suav nrog cov khoom siv hluav taws xob, kev tsim vaj tsev, thiab cov khoom siv kho kom zoo nkauj.
Ib qho ntawm qhov zoo tshaj plaws ntawm tooj dag C44300 yog nws cov corrosion kuj zoo heev, tshwj xeeb tshaj yog nyob rau hauv marine ib puag ncig. Qhov sib ntxiv ntawm cov tin rau cov alloy pab tiv thaiv dezincification - ib hom corrosion uas tuaj yeem tshwm sim hauv tooj dag nrog cov ntsiab lus zinc siab. Raws li qhov tshwm sim, tooj dag C44300 feem ntau siv rau hauv kev siv dej hiav txwv, xws li cov kiv cua, twj, thiab cov khoom siv hauv hiav txwv.
Brass C44300 tuaj yeem ua kom zoo rau kev ua haujlwm zoo thiab txo qis kev ntxhov siab. Txhawm rau kom tau txais txiaj ntsig zoo, nws yuav tsum tau ua kom sov rau qhov kub ntawm 400-650 degree rau 30 feeb mus rau 1 teev, tom qab ntawd maj mam txias hauv huab cua. Txawm li cas los xij, kev siv tooj dag C44300 mus rau qhov kub siab rau lub sijhawm ntev tsis pom zoo, vim nws yuav ua rau brittleness thiab txo nws cov khoom tag nrho.
Brass C44300 muaj kev ua haujlwm zoo thiab tuaj yeem tig tau yooj yim, drilled, milled, thiab tapped. Carbide-txiav cov cuab yeej raug pom zoo rau machining no alloy. Nws yog ib qho tseem ceeb uas yuav tsum siv cov txheej txheem machining kom raug thiab cov roj nplua nyeem kom tsis txhob muaj cua sov thiab cov cuab yeej hnav.
Brass C44300 tuaj yeem welded siv ntau txoj hauv kev, suav nrog roj tungsten arc vuam (GTAW), roj hlau arc vuam (GMAW), thiab oxyacetylene vuam. Nws yog ib qho tseem ceeb kom tsis txhob muaj porosity thiab tawg thaum lub sij hawm vuam, xws li siv cov hlau muab tub lim thiab preheating lub workpiece.
