Stainless Hlau Railings
Stainless hlau yog ib qho ntawm cov khoom siv tshaj plaws rau cov hlau railings, feem ntau muab faib ua 304 thiab 316 qib . 304 stainless hlau muaj 18% chromium thiab 8% npib tsib xee (cov ntaub ntawv qhov chaw: International Stainless Steel Forum ISSF), muaj zog corrosion kuj, thiab yog haum rau sab hauv tsev lossis sab nraum zoov ib puag ncig; 316 stainless hlau ntxiv 2% molybdenum, ua rau nws tiv taus cov tshuaj chloride ion corrosion thiab haum rau cov ntug dej hiav txwv lossis siab - thaj chaw av noo. Stainless hlau railings tuaj yeem ua tiav nrog txhuam, daim iav, lossis cov xuab zeb blasted, ua rau lawv zoo nkauj thiab yooj yim los ntxuav, tab sis kim dua.
Carbon Steel Railings
Cov pa roj carbon steel feem ntau yog tsim los ntawm cov hlau thiab carbon, muaj lub zog siab, thiab pheej yig, feem ntau siv hauv kev lag luam lossis ib ntus laj kab. Nws qhov tsis zoo yog tias nws yooj yim rau xeb, yuav tsum tau kub -dip galvanizing lossis los tiv thaiv- xim pleev xim kom ntev nws txoj sia. Raws li ASTM A36 tus qauv, lub zog tensile ntawm cov pa roj carbon zoo tib yam yog 400-550 MPa (cov ntaub ntawv qhov chaw: American Society for Testing and Materials), haum rau cov ntawv thov uas yuav tsum muaj kev thauj khoom siab, tab sis yuav tsum tau saib xyuas tsis tu ncua.
Aluminium Alloy Railings:
Aluminium alloys yog lub teeb yuag (qhov ceev kwv yees li 2.7 g / cm³, tsuas yog 1/3 qhov ntom ntawm cov hlau), corrosion-resistant, thiab tuaj yeem ua anodized kom ua tiav ntau yam xim. 6061 thiab 6063 feem ntau siv qib, nrog tensile lub zog ntawm 124 MPa thiab 130 MPa raws li peb lub koom haum (AA). Tsim nyog rau cov vaj tsev nyob lossis kev tsim kho vaj tse, tab sis nrog lub zog qis dua cov hlau, lawv tsis haum rau siab - cuam tshuam ib puag ncig.
Cam khwb cia hlau Railings:
Cam khwb cia hlau railings paub txog lawv cov qauv retro. Lawv nyuaj tab sis nkig, nrog lub zog compressive tshaj 200 MPa (Source: American Foundry Society AFS). Feem ntau siv hauv European-style architecture lossis cov laj kab zoo nkauj, lawv xav tau kev kho xeb tsis tu ncua. Cov txheej txheem niaj hnub no feem ntau siv cov hlau nplaum (xws li QT500-7), ua kom nws elongation mus rau 7%, ntsuas lub zog thiab tawv.