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{{2}alloy high coil (hlɔnhlɔn 355{{6}690 MPa), e nɔ na 50% ɖagbe hu 50% bo nɔ hɛn nǔ lɛ ɖó te bo nɔ hɛn nǔ lɛ ɖó te nú agban e nɔ hɛn nǔ lɛ ɖó kpɔ́ é-ɖɛ̀n ɖ’ayǐ ɖi bridges kpodo tɔjihun lɛ kpo; 3. High- nɔ hɛn gan syɛnsyɛn (hlɔnhlɔn hlɔnhlɔn tɔn ɖaxó hú 780 MPa), bɔ è nɔ zán jɛ nukɔn ɖò tɔ̀jíhún lɛ kpo jɔmɛhunkuntɔ́ lɛ kpo mɛ, amɔ̌, é nɔ byɔ ɖɔ è ni zán hlɔnhlɔn ɖaxó ɖé hú 1000 degrés nú ɖiɖó; 4. Gan e nɔ hɛn nǔ gblé dó mɛ wu é (chromium e ɖò mɛ é sukpɔ́ hú 10,5%), bɔ é nɔ ɖí xwi xá acide kpo alkali kpo sín hǔn (é nɔ hɛn nǔ gblé dó mɛ wu ɖò xwè ɖokpo ɖokpo mɛ<0.01mm), is a preferred material for food processing equipment.