Qhov ntom ntom yog qhov ntsuas ntawm qhov hnyav hauv ib lub ntim tshwj xeeb. Qhov ntom yog sib npaug rau qhov loj ntawm ib qho khoom faib los ntawm nws qhov ntim. Nws tuaj yeem sawv cev los ntawm lub cim ρ. Hauv International System of Units thiab suav kev ntsuas kev cai lij choj, chav tsev ntawm qhov ceev yog kilograms ib 'meter'. Qhov ceev qhia txog tus yam ntxwv ntawm cov khoom nws tus kheej. Lub ntsiab lub cev muaj nuj nqis uas cuam tshuam rau qhov ntom ntawm cov khoom yog siab thiab kub.
01. Carbon hlau
Qhov ceev ntawm carbon steel yog 7.85g / cm3.
Cov pa roj carbon steel yog cov hlau-carbon alloy nrog cov ntsiab lus carbon ntawm 0.0218% rau 2.11%. Nws tseem hu ua carbon steel. Nws feem ntau muaj me me ntawm silicon, manganese, sulfur, thiab phosphorus. Feem ntau, qhov siab dua cov ntsiab lus ntawm cov pa roj carbon steel, qhov hardness thiab lub zog ntau dua, tab sis cov yas qis dua.
Cov pa roj carbon steel yog cov hlau-carbon alloy nrog cov ntsiab lus carbon ntawm 0.0218% rau 2.11%. Nws tseem hu ua carbon steel. Nws feem ntau muaj me me ntawm silicon, manganese, sulfur, thiab phosphorus. Feem ntau, qhov siab dua cov ntsiab lus ntawm cov pa roj carbon steel, qhov hardness thiab lub zog ntau dua, tab sis cov yas qis dua.
02. Galvanized hlau
Qhov ceev ntawm galvanized steel yog 7.85g / cm3
03.Stainless hlau
Qhov ceev ntawm stainless hlau yog nyob nruab nrab ntawm 7.70-8.00 g/cm³.
Qhov ceev ntawm cov hlau zoo tib yam xws li 304 thiab 316 yog 7.93g / cm3.
Qhov ceev ntawm cov hlau zoo tib yam xws li 304 thiab 316 yog 7.93g / cm3.
04.Aluminium
Qhov ceev ntawm txhuas yog 2.7 g / cm³
Tus txheeb ze ntom ntom 2.70. Melting point 660 degree. Kub taw tes 2327 degree. Cov ntsiab lus ntawm txhuas nyob rau hauv lub ntiaj teb crust nyob rau hauv qeb thib peb tom qab cov pa oxygen thiab silicon, thiab nws yog cov hlau ntau tshaj plaws nyob rau hauv lub ntiaj teb crust.
Tus txheeb ze ntom ntom 2.70. Melting point 660 degree. Kub taw tes 2327 degree. Cov ntsiab lus ntawm txhuas nyob rau hauv lub ntiaj teb crust nyob rau hauv qeb thib peb tom qab cov pa oxygen thiab silicon, thiab nws yog cov hlau ntau tshaj plaws nyob rau hauv lub ntiaj teb crust.
05.Xov tooj
Qhov ceev ntawm tooj liab yog 8.96g / cm³
Copper yog ib qho kev hloov pauv, nrog rau cov cim tshuaj Cu. Qhov ceev ntawm cov khoom tooj liab yog 8.960g / cm³, thiab qhov ceev ntawm cov kua tooj liab yog 8.920g / cm³.
Copper yog ib qho kev hloov pauv, nrog rau cov cim tshuaj Cu. Qhov ceev ntawm cov khoom tooj liab yog 8.960g / cm³, thiab qhov ceev ntawm cov kua tooj liab yog 8.920g / cm³.
06. Titanium
Qhov ceev ntawm titanium yog 4.506-4.516 g / cm³ (20 degree)
Qhov ceev ntawm titanium yog siab dua li ntawm txhuas, tab sis qis dua cov hlau, tooj liab thiab npib tsib xee. Tab sis nws yog cov hlau uas muaj zog tshaj plaws, 3 npaug zog dua li cov hlau tsis muaj steel thiab 1.3 npaug zog dua txhuas.
Qhov ceev ntawm titanium yog siab dua li ntawm txhuas, tab sis qis dua cov hlau, tooj liab thiab npib tsib xee. Tab sis nws yog cov hlau uas muaj zog tshaj plaws, 3 npaug zog dua li cov hlau tsis muaj steel thiab 1.3 npaug zog dua txhuas.
