Hlau yog ib lo lus dav dav rau cov hlau-carbon alloys nrog cov ntsiab lus carbon ntawm nruab nrab ntawm 0.02% thiab 2.11% los ntawm huab hwm coj. Tshuaj lom neeg muaj pes tsawg leeg ntawm cov hlau tuaj yeem sib txawv heev. Cov kauj uas muaj cov roj carbon tsuas yog hu ua carbon steel (carbon steel) lossis steel zoo tib yam. Hauv kev tsim ntau lawm, cov hlau feem ntau muaj cov ntsiab lus sib txawv nyob ntawm daim ntawv thov, xws li manganese, Nickel, vanadium, thiab lwm yam.
Tib neeg muaj keeb kwm ntev ntawm kev thov thiab kev tshawb fawb hauv cov hlau, tab sis txog thaum qhov kev tsim ua tiav ntawm Bayesian steelmaking cov txheej txheem nyob rau xyoo pua puv 19, kev tsim steel yog ib txoj haujlwm kim thiab tsis muaj txiaj ntsig. Niaj hnub no, steel yog ib qho ntawm cov khoom siv thoob plaws ntiaj teb rau nws tus nqi qis thiab kev ua tau zoo. Nws yog qhov tseem ceeb ntawm kev tsim kho hauv kev tsim kho, tsim kev lag luam thiab tib neeg lub neej txhua hnub. Nws tuaj yeem hais tias steel yog cov khoom siv hauv paus ntawm lub neej niaj hnub.
Lub teb chaws tus qauv GB / T 13304-91 "Kev Ntsuas Cov Hlau" ntawm Cov Neeg Sawv Cev ntawm Tuam Tshoj piav qhia: "Cov ntaub ntawv muaj hlau ua lub ntsiab lus thiab muaj cov pa roj carbon tsawg tshaj li 2% thiab muaj lwm cov ntsiab lus." Feem ntau hais lus, tshwj tsis yog rau chromium steel. Rau lwm cov qib steel, cov pa roj carbon cov ntsiab lus ntawm qee cov chrome steels raug tso cai ntau dua 2%. Cov hlau alloy muaj ntau tshaj 2% carbon yog cam khwb cia hlau. Cov lus txhais ntawm cov hlau hauv lwm cov txheej txheem thoob ntiaj teb xws li ISO 4948 lossis EN 10020 zoo sib xws.
Hais lus nruj me ntsis, hlau yog hlau-carbon hlau nrog cov ntsiab lus carbon ntawm 0.0218% thiab 2.11 [1]%. Peb feem ntau xa mus rau nws li hlau thiab hlau. Txhawm rau kom ntseeg tau tias nws cov tawv tawv thiab yas, cov pa roj carbon ntsiab lus feem ntau tsis dhau 1.7%. Ntxiv rau cov hlau thiab carbon, cov ntsiab lus tseem ceeb ntawm cov hlau suav nrog silicon, manganese, sulfur, thiab phosphorus. Lwm cov khoom xyaw tsim kom txawv cov khoom ntawm cov hlau.
Height Musical Instrument Co., Ltd. muaj peev xwm muab cov neeg siv khoom lag luam nrog lub suab paj nruag folding sawv thiab hnab , cov khoom lag luam ntim microphone sawv ntsug, lub suab seev sawv ntsug thiab lwm yam khoom. Peb cov khoom yog ua los ntawm cov hlau.
Kho kom raug los ntawm qhov siab ntsuas cov xov xwm Lub Chaw Haujlwm