Cov tshuaj muaj pes tsawg leeg ntawm Q550D feem ntau suav nrog cov ntsiab lus xws li carbon, silicon, manganese, phosphorus thiab sulfur. Ntawm lawv, cov pa roj carbon yog cov ntsiab lus tseem ceeb cuam tshuam rau lub zog thiab lub zog ntawm cov hlau, silicon thiab manganese tuaj yeem txhim kho lub zog thiab tawv tawv ntawm cov hlau, thaum phosphorus thiab sulfur muaj kev cuam tshuam rau qhov toughness thiab corrosion kuj ntawm hlau.
Q550D siab zog steel phaj muaj cov khoom siv zoo heev, nws lub zog tensile tuaj yeem ncav cuag ntau dua 550MPa, cov ntsiab lus tawm los yog ntau dua 400MPa, elongation yog ntau dua 17%. Nyob rau tib lub sijhawm, nws kuj muaj kev cuam tshuam zoo, thiab tuaj yeem raug stamped, khoov thiab lwm yam kev ua haujlwm ntawm qhov kub thiab txias. Tom qab kev kho cua sov, nws cov khoom siv kho tshuab tuaj yeem txhim kho ntxiv.
Qhov ceev ntawm Q550D high-strength steel phaj yog hais txog 7.85g / cm³, thiab nws muaj ib tug zoo thermal conductivity thiab coefficient ntawm thermal expansion. Nws cov thermal conductivity yog li 15W / (mK), thiab nws cov coefficient ntawm thermal expansion yog li 12 × 10^-6/K, thiab cov khoom no muab nws zoo seem stability ntawm qhov kub thiab txias. Tsis tas li ntawd, Q550D muaj cov hlau nplaum zoo thiab hluav taws xob conductivity, uas tuaj yeem siv los tsim cov khoom siv hluav taws xob siab.
