Review on GI P 38 Can Opener 5 Pack by Robert Hole

PHYSI CS Why don't magnets work on some stainless steels? Stainless steels are iron-based alloys best known for their excellent resistance to corrosion, largely due to the concentration of chromium in the steel. There are different types of stainless steel. The two main types are austenitic and ferritic, each with a different atomic arrangement. Because of this difference, ferritic stainless steels are typically magnetic while austenitic stainless steels are not. Ferritic stainless steel owes its magnetism to two factors: its high iron content and its basic structure. The metal atoms in austenitic stainless steel are arranged in a face-centered cubic (fcc) lattice. The unit cell of an fcc crystal consists of a cube with one atom in each of the eight corners of the cube and one atom in the center of each of the six faces. However, in ferritic stainless steel, the metal atoms are arranged in a body-centered (bcc) lattice. The unit cell of a bcc crystal is a cube with one atom in each of the eight corners and one atom in the geometric center of the cube. Alloying stainless steel with elements such as nickel, manganese, carbon and nitrogen increases the likelihood that the alloy will have an fcc crystal structure at room temperature. Chromium, molybdenum and silicon increase the likelihood that the alloy will have a bcc crystal structure at room temperature.