Coil is a steel or iron plate of fixed thickness produced through hot or cold rolling. Its structure consists of a surface layer, a hard middle layer, and a soft inner layer. Common materials include: 1. Ordinary carbon steel coil (carbon content 0.05-0.25%), which offers excellent weldability and cold formability (elongation ≥30%) and is suitable for furniture and automotive manufacturing, but also has a relatively high magnetic permeability (>5000μ); 2. Low-}alyaly ga -tang ti ngangu (ngangu ti yield 355-690 MPa), so ayeke na 50% ti nzoni ti ngoi na a leke ni mbilimbili ndali ti charge-}}}0. 3. Ga na -}Testion ti acier (ngangu ti gbungo ye A hon wala a lingbi na 780 MPa), so a sala kusala na ni kozoni kue na yâ ti alege ti tambela na a-avion, me a hunda ti tene a sala kusala na ni na kota wâ ahon 1000 degré ti lekengo ni; 4. Bobine ti wen so ayeke na bongo pëpe (so ayeke na yâ ti chromium A hon wala a lingbi na 10,5%), so ayeke na ngangu ti sara si acide nga na alcali abuba (wungo ti ngu oko oko<0.01mm), is a preferred material for food processing equipment.