31. Many ferrous metal castings are sized to sharpen corners and flatten holes around piercings. 32. Almost all the scientific work on supercooling metal has involved ferrous metals , steel mostly. 33. Whilst on the conveyor, a magnet removes ferrous metal from the ash for recycling. 34. There are several kinds of non-ferrous metal that have been used by ancient people. 35. Protective tariffs on textiles, clothes, ferrous metals , chemical products and electric bulbs will remain. 36. Induction stove tops require flat-bottomed pans made of ferrous metals . 37. Rust is a form of corrosion that affects ferrous metals like iron and steel. 38. When ferrous metals cool after melting, they record the magnetic dominance at that moment. 39. Non-ferrous metal , brokerage, and shipping shares were also big gainers. 40. When ferrous metals cool from a melt, they record the magnetic dominance at that moment.
