Cov pa roj carbon (C)
Cov pa roj carbon monoxide yog ib qho tseem ceeb tshaj plaws hauv steel kauj, nrog cov ntsiab lus ntawm 0.08% mus rau 2.2%. Tsawg- carbon steel coil (tsawg C cov ntsiab lus) muaj qhov toughness zoo thiab machinability, ua rau nws haum rau txias-cov khoom kos, tsheb kauj vab, thiab rooj tog zaum. High- carbon steel coil (siab C cov ntsiab lus) muaj cov hardness zoo heev thiab hnav tsis kam, ua rau nws tsim nyog rau kev tsim cov cuab yeej, springs, thiab bearings.
Silicon (Si) thiab Manganese (Mn)
Silicon thiab manganese yog cov ntsiab lus alloying hauv steel kauj. Silicon txhim kho lub zog tensile thiab kub tsis kam ntawm steel kauj, pab kom muaj qhov zoo ntawm qhov chaw. Manganese tsub kom lub hardness thiab lub zog ntawm cov hlau, thaum tseem txhim kho nws cov weldability thiab forgeability, ua rau nws tsim nyog rau tsim mechanical qhov chaw, automotive qhov chaw, thiab lwm yam kev siv.
Sulfur (S) thiab Phosphorus (P)
Sulfur thiab phosphorus yog impurity hais nyob rau hauv steel kauj. Phosphorus txo cov plasticity thiab toughness ntawm steel kauj. Cov qib ntau dhau tuaj yeem ua rau tawg. Yog li ntawd, rau siab - zoo steel kauj, cov ntsiab lus phosphorus yuav tsum nruj me ntsis tswj hauv qab 0.045%. Txawm hais tias leej faj tuaj yeem ua cov hlau coils yooj yim dua los txiav, cov ntsiab lus sulfur siab dhau tuaj yeem ua rau kub brittleness, yog li txo cov khoom siv thiab qhov zoo ntawm cov hlau. Yog li, cov ntsiab lus sulfur feem ntau yuav tsum tau tswj qis dua 0.05%.
