Hauv kev lag luam niaj hnub thiab kev tsim kho engineering, steel profiles yog cov khoom tseem ceeb tau vim lawv lub zog siab, kav ntev, thiab cov yas. Txawm li cas los xij, kev xaiv los ntawm cov khoom siv ncaj qha cuam tshuam ncaj qha cuam tshuam kev nyab xeeb ntawm kev nyab xeeb ntawm cov khoom siv tau, thiab tus nqi hloov kho, thiab tus nqi- ua hauj lwm zoo.
Los ntawm kev pom mechanical, carbon qauv hlau (xws li Q235) yog dav siv nyob rau hauv dav dav txheej txheem vim nws lub zog zoo thiab muaj zog. Low-alloy high-strength steel (such as Q355) can reduce weight by 15%-20% under equivalent conditions by adding elements such as manganese and silicon, making it suitable for long-span bridges and high-rise buildings. Stainless hlau (xws li 304 thiab 316), nrog nws cov tub ntxhais hluav taws xob tsis kam thiab siv cov pa roj hmab zoo nkauj nrog cov tshuaj tsuag cov tshuaj ntsev ntau. Txawm li cas los xij, nws tus nqi yog kwv yees li 3-}}}}}}}} ntawm cov carbon steel, tsim nyog ua lag luam ntawm kev lag luam tu ncua ntev.
Qhov tshwm sim ib puag ncig yog qhov tseem ceeb dua cov khoom lag luam xaiv. Hauv kev xeb huab cua los yog huab cua ua kom huv (xws li Q295Gnh) cov xim sib zog ntawm anti- corrosion txheej. For extremely low-temperature environments (eg, below -40℃), nickel-based steels with excellent low-temperature toughness (such as 16MnDR) are recommended to avoid the risk of brittle cracking.
Tsis tas li ntawd, cov txheej txheem sib xyaw yog qhov tseem ceeb heev. Tej yaam num yuav tsum tau siv tsawg weldability yuav tsum tau siv tsawg {1} Cov ntsiab lus tsawg dua los yog sib npaug Kev xyaum engineering, nws raug nquahu kom simulate loads los ntawm cov qauv finite thiab xa mus rau kev ua tiav qhov kev nyab xeeb thiab tus nqi- ua hauj lwm zoo. Kev xaiv kev tshawb fawb tsis yog tsuas yog txiav txim siab tswv yim; Nws tseem pom lub luag haujlwm thoob plaws txhua qhov project lub neej.