Ib qho zoo tagnrho Strength-rau-Weight Ratio
A709 alloy, uas yog tsim los ntawm hlau, manganese, carbon, thiab lwm yam khoom, tuav lub zog zoo-rau-hnyav piv. Qhov no txhais tau hais tias cov hlau me me yuav tsum tau ua kom tau raws li peb cov neeg siv khoom lub zog sib txawv, txhim kho kev ua tau zoo thiab txo qhov hnyav dua.
A709 alloy kuj tseem muaj kev tiv thaiv corrosion zoo heev, tso cai rau nws kom muaj sia nyob ntev - txawm tias thaum huab cua hnyav tshaj plaws. Cov khoom no ua rau A709 zoo tagnrho rau cov ntawv thov xws li txuas hniav, thiab yog cov khoom siv txheem ua haujlwm los ntawm American Association of State Highway and Transportation.
Cov khoom uas sib xyaw muaj zog thiab Weldability
A709 steel tuav lub zog tensile tawm ntawm 50, 000 psi thiab lub zog tensile kawg ntawm 65,300 psi. Nws kuj yog ib qho zoo heev weldable thiab tuaj yeem tsim tau zoo heev welded pob qij txha. Lub zog siab, qis alloy steel tuaj yeem siv rau hauv:
I-Beam
Lub kaum sab xis
Wide Flange Beams
Hlau Phaj
Structural Steel Channels
Kev sib cais
Cov muaj pes tsawg leeg ntawm A709 tuaj yeem sib txawv me ntsis, tab sis feem ntau nyob hauv cov kev txwv hauv qab no:
98% hlau
0.23% Carbon
1.35% Manganese cov ntsiab lus
< 0.040% Phosphorous
< 0.050% Sulfur
