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. ຕ່ໍາ - ໂລຫະປະສົມ - {{{{{{{{{{8. 3. ສູງ {- ແຜ່ນເຫຼັກທີ່ມີຄວາມເຂັ້ມແຂງ 4. Coil ສະແຕນເລດ (ເນື້ອໃນຂອງ Chromium ຫຼາຍກ່ວາຫຼືເທົ່າກັບ 10.5%), ເຊິ່ງທົນທານຕໍ່ອາຊິດແລະ alkali corrosion (ປະຈໍາປີ<0.01mm), is a preferred material for food processing equipment.
